Flame synthesis preparation system and method of yttrium-stabilized zirconia nano powder material

Abstract

The invention discloses a flame synthesis preparation system and method for a yttrium-stabilized zirconia nano-powder material. The system comprises a flame synthesis module, a raw material conveying module and a powder collecting module, the method comprises the following steps: 1, preparing a precursor solution synthesized by atomizing zirconium oxide nano powder; 2, preparing a precursor solution synthesized by atomizing yttrium oxide nano powder; and step 3, performing atomization synthesis to obtain the yttrium-stabilized zirconia powder material. According to the flame synthesis preparation system and method for the yttrium-stabilized zirconia nano-powder material, the high-performance nano-powder material is synthesized by adopting an atomized flame synthesis method, and the flame synthesis preparation system and method have the advantage that zirconia and yttrium oxide are uniformly doped.

Description

Technical Field

[0001] The present invention belongs to the technical field of preparing high-performance yttrium-stabilized zirconia nanopowder materials by flame synthesis method, and particularly relates to a flame synthesis preparation system and method for yttrium-stabilized zirconia nanopowder materials. Background Art

[0002] Yttrium-stabilized zirconia (YSZ) nanopowder materials have excellent thermal stability, high ionic conductivity and mechanical strength, especially outstanding at high temperatures, and are widely used in the fields of electrolytes of solid oxide fuel cells, oxygen sensors, thermal barrier coatings and biomedical materials. The technologies for preparing yttrium-stabilized zirconia nanopowders mainly include co-precipitation method, sol-gel method, hydrothermal method, spray pyrolysis method and flame synthesis method, etc. Among them, the flame synthesis method has the advantages of fast reaction speed, small and uniform particle size, high purity, simple process and wide applicability, and can complete the synthesis in one step and realize continuous production, and is particularly suitable for large-scale preparation of high-performance YSZ nanopowders.

[0003] However, there are still important challenges in preparing yttrium-stabilized zirconia nanopowder materials by flame synthesis method: the doping uniformity of yttrium element is crucial for the performance of yttrium-stabilized zirconia nanopowders, but in flame synthesis, the difference in reaction rates of yttrium and zirconium precursors easily leads to uneven doping, affecting the stability and conductivity of the materials.

[0004] To solve the above problems, the present invention proposes a flame synthesis preparation system and method for yttrium-stabilized zirconia nanopowder materials. Summary of the Invention

[0005] The main object of the present invention is to provide a flame synthesis preparation system and method for yttrium-stabilized zirconia nanopowder materials, to realize the synthesis of high-performance nanopowder materials by atomized flame synthesis method, and has the advantage of uniform doping of zirconia and yttrium oxide.

[0006] To achieve the above object, a flame synthesis preparation system for yttrium-stabilized zirconia nanopowder materials includes a flame synthesis module, a raw material delivery module and a powder collection module, wherein:

[0007] The flame synthesis module includes a flame controller (1), a data transmission line (2), a flame synthesis chamber (3), a high-temperature observation window (4), an infrared detection camera (5), a thermocouple (6), a temperature-adjustable fuel gas pipe (7), a temperature-adjustable air pipe (8), a temperature-adjustable burner (9) and an air flow discharge pipe (10), and the flame synthesis module is used to form a high-temperature flame and provide a synthesis preparation environment;

[0008] The raw material conveying module includes a zirconia synthesizer (13), a zirconia atomizing nozzle (14), a yttria synthesizer (15), a yttria atomizing nozzle (16), a zirconia air pipe (21), a zirconia precursor pipe (22), a zirconia combustible gas pipe (23), a liquid flow pump (25), a zirconia precursor tank (26), a yttria air pipe (28), an air compression storage tank (29), a yttria precursor pipe (30), a yttria combustible gas pipe (31), a combustible gas cylinder (32), an attached wall air branch pipe (33), a yttria precursor tank (34), and a valve (35). The raw material conveying module is used to transfer each raw material to the flame synthesis chamber (3) and provide a corresponding atomized synthesis flame;

[0009] The powder collection module includes a powder collector (11) and an induced draft fan (12). The powder collection module is used to collect the yttria-stabilized zirconia nanopowder material contained in the air flow.

[0010] As a further preferred technical solution of the above technical solution, the flame synthesis chamber (3) is a closed chamber for accommodating the atomized synthesis flame; the upper end of the flame synthesis chamber (3) is the outlet of the air flow containing the yttria-stabilized zirconia nanopowder material, which is connected and communicated with the air flow discharge pipe (10); the powder collector (11) is connected to the middle of the air flow discharge pipe (10); the powder collector (11) is used to collect the yttria-stabilized zirconia nanopowder material discharged from the air flow discharge pipe (10);

[0011] The lower part of the flame synthesis chamber (3) is semi-cylindrical, forming a semi-circular chamber (19); the semi-circular chamber (19) facilitates the flow and guiding effect of the air flow inside;

[0012] At one end of the air flow discharge pipe (10) that is not connected to the flame synthesis chamber (3), the induced draft fan (12) is connected; the induced draft fan (12) plays a suction role, and while sucking the air flow containing the yttria-stabilized zirconia nanopowder material, it plays a role in constructing the negative pressure inside the flame synthesis chamber (3).

[0013] As a further preferred technical solution of the above technical solution, the high-temperature observation window (4) is installed on the upper part of the left side wall of the flame synthesis chamber (3);

[0014] On the outside of the high-temperature observation window (4), the infrared detection camera (5) is provided; the infrared detection camera (5) is used to observe the flame morphology characteristics and flame stability inside the flame synthesis chamber (3) through the high-temperature observation window (4);

[0015] The infrared detection camera (5) is connected to the flame controller (1) through the data transmission line (2); in the middle of the left side wall of the flame synthesis chamber (3), the thermocouple (6) is installed; the thermocouple (6) is used to monitor the temperature inside the flame synthesis chamber (3); the thermocouple (6) is connected to the flame controller (1) through the data transmission line (2);

[0016] The infrared detection camera (5) transmits the flame data to the flame controller (1); the infrared detection camera (5) transmits the flame data to the flame controller (1); the flame controller (1) analyzes the flame observation and temperature measurement data, and feeds back to each flow regulating valve to automatically adjust the flame shape, temperature distribution and flame stability;

[0017] In the middle of the left side wall of the flame synthesis chamber (3), near the position of the thermocouple (6), the temperature regulating burner (9) is installed; the temperature regulating burner (9) is used to form a high-temperature flame, so as to adjust the mixing and sintering temperature environment of zirconia powder and yttria powder.

[0018] As a further preferred technical solution of the above technical solution, on the right side wall of the flame synthesis chamber (3), the upper inclined arch (24) and the lower inclined arch (27) are arranged adjacent to each other from top to bottom;

[0019] The shapes and sizes of the upper inclined arch (24) and the lower inclined arch (27) are the same, and both are inclined single-step structures;

[0020] On the upper inclined wall of the upper inclined arch (24), the zirconia synthesizer (13) is vertically installed; at the central position of the zirconia synthesizer (13), the zirconia atomizing nozzle (14) is coaxially arranged;

[0021] On the upper inclined wall of the lower inclined arch (27), the yttria synthesizer (15) is vertically installed; at the central position of the yttria synthesizer (15), the yttria atomizing nozzle (16) is coaxially arranged;

[0022] At the lower part of the right side wall of the flame synthesis chamber (3), near the lower edge of the lower inclined arch (27), perpendicular to the right side wall of the flame synthesis chamber (3), the wall-attached air inlet pipe (20) is installed;

[0023] On the lower inclined wall of the lower inclined arch (27), the igniter (17) is vertically installed through the middle of the wall, and the igniter (17) is used to ignite the flame inside the flame synthesis chamber (3);

[0024] Inside the flame synthesis chamber (3), opposite to the outlet of the wall-attached air inlet pipe (20), a flow guide plate (18) is provided; the flow guide plate (18) is in the shape of an inverted capital L and covers the outlet area of the wall-attached air inlet pipe (20).

[0025] As a further preferred technical solution of the above technical solution, the yttrium oxide precursor tank (34) is used to store the precursor solution for yttrium oxide atomized flame synthesis; the zirconium oxide precursor tank (26) is used to store the precursor solution for zirconium oxide atomized flame synthesis; the air compression storage tank (29) is used to store compressed air; the combustible gas cylinder (32) is used to store fuel gas;

[0026] One end of the temperature-adjustable fuel gas pipe (7) is connected to the fuel gas port at the center of the temperature-adjustable burner (9); the other end of the temperature-adjustable fuel gas pipe (7) is connected to the combustible gas cylinder (32); a valve (35) is provided on the temperature-adjustable fuel gas pipe (7) for adjusting the air flow rate; the temperature-adjustable fuel gas pipe (7) is used for circulating combustible gas;

[0027] One end of the temperature-adjustable air pipe (8) is connected to the air port on the outer ring of the temperature-adjustable burner (9); the other end of the temperature-adjustable air pipe (8) is connected to the air compression storage tank (29); a valve (35) is provided on the temperature-adjustable air pipe (8) for adjusting the air flow rate; the temperature-adjustable air pipe (8) is used for circulating air;

[0028] One end of the wall-attached air branch pipe (33) is connected to the wall-attached air inlet pipe (20); the other end of the wall-attached air branch pipe (33) is connected to the temperature-adjustable air pipe (8); a valve (35) is provided on the wall-attached air branch pipe (33) for adjusting the air flow rate; the wall-attached air branch pipe (33) is used for circulating air;

[0029] One end of the yttrium oxide precursor pipe (30) is connected to the yttrium oxide atomizing nozzle (16); the other end of the yttrium oxide precursor pipe (30) is connected to the yttrium oxide precursor tank (34); a valve (35) is provided on the yttrium oxide precursor pipe (30) for adjusting the liquid flow rate; the yttrium oxide precursor pipe (30) is used for circulating the yttrium oxide precursor solution; a liquid flow pump (25) is provided on the yttrium oxide precursor pipe (30) for boosting the liquid flow.

[0030] One end of the zirconia precursor tube (22) is connected to the zirconia atomizing nozzle (14); the other end of the zirconia precursor tube (22) is connected to the zirconia precursor tank (26); a valve (35) is provided on the zirconia precursor tube (22) for regulating the liquid flow rate; the zirconia precursor tube (22) is used for circulating the zirconia precursor solution; a liquid flow pump (25) is provided on the zirconia precursor tube (22) for boosting the liquid flow.

[0031] As a further preferred technical solution of the above technical solution, one end of the zirconia air tube (21) is connected to the outer annular air port of the zirconia synthesizer (13); the other end of the zirconia air tube (21) is connected to the air compression storage tank (29); a valve (35) is provided on the zirconia air tube (21) for regulating the air flow rate; the zirconia air tube (21) is used for circulating air;

[0032] One end of the zirconia combustible gas tube (23) is connected to the outer annular fuel gas port of the zirconia synthesizer (13); the other end of the zirconia combustible gas tube (23) is connected to the combustible gas cylinder (32); a valve (35) is provided on the zirconia combustible gas tube (23) for regulating the gas flow rate; the zirconia combustible gas tube (23) is used for circulating fuel gas;

[0033] One end of the yttria air tube (28) is connected to the outer annular air port of the yttria synthesizer (15); the other end of the yttria air tube (28) is connected to the air compression storage tank (29); a valve (35) is provided on the yttria air tube (28) for regulating the air flow rate; the yttria air tube (28) is used for circulating air;

[0034] One end of the yttria combustible gas tube (31) is connected to the outer annular fuel gas port of the yttria synthesizer (15); the other end of the yttria combustible gas tube (31) is connected to the combustible gas cylinder (32); a valve (35) is provided on the yttria combustible gas tube (31) for regulating the gas flow rate; the yttria combustible gas tube (31) is used for circulating fuel gas.

[0035] To achieve the above object, the present invention also provides a flame synthesis preparation method of yttria-stabilized zirconia nanopowder material, comprising the following steps:

[0036] Step 1: Prepare a precursor solution for the atomization synthesis of zirconia nanopowder;

[0037] Step 2: Prepare a precursor solution for the atomization synthesis of yttria nanopowder;

[0038] Step 3: Atomize and synthesize yttrium-stabilized zirconia powder material.

[0039] As a further preferred technical solution of the above technical solution, Step 1 is specifically implemented as follows:

[0040] Step S1.1: Select a zirconium source;

[0041] Step S1.2: Dissolve the zirconium source in a solvent to ensure complete dissolution;

[0042] Step S1.3: Add an organic dispersant to improve the solution stability and powder dispersibility;

[0043] Step S1.4: Add a small amount of ammonia water solution to the solution to adjust the pH value to make the solution acidic, so as to control the hydrolysis and polycondensation reactions in the solution.

[0044] As a further preferred technical solution of the above technical solution, Step 2 is specifically implemented as follows:

[0045] Step S2.1: Select a yttrium source;

[0046] Step S2.2: Dissolve the yttrium source in a solvent to ensure complete dissolution;

[0047] Step S2.3: Add an organic dispersant to improve the solution stability and powder dispersibility;

[0048] Step S2.4: Add a small amount of ammonia water solution to the solution to adjust the pH value to make the solution acidic, so as to control the hydrolysis and polycondensation reactions in the solution.

[0049] As a further preferred technical solution of the above technical solution, Step 3 is specifically implemented as follows:

[0050] Step S3.1: Open the zirconia air pipe (21) and zirconia combustible gas pipe (23) connected to the zirconia synthesizer (13), and at the same time open the yttrium combustible gas pipe (31) and yttrium air pipe (28) connected to the yttrium synthesizer (15);

[0051] Step S3.2: Start the igniter (17) to ignite the combustible gas and form a standby flame at the outlet of the zirconia synthesizer (13) and a standby flame at the outlet of the yttrium synthesizer (15);

[0052] Step S3.3: Turn on the zirconia precursor tube (22) and the zirconia atomizing nozzle (14), and at the same time turn on the yttrium oxide precursor tube (30) and the yttrium oxide atomizing nozzle (16), so as to respectively form a zirconia precursor atomizing jet and a yttrium oxide precursor atomizing jet at the outlets of the zirconia atomizing nozzle (14) and the yttrium oxide atomizing nozzle (16); thus, an atomizing synthesis flame for synthesizing zirconia powder is constructed at the outlet of the zirconia synthesizer (13), and an atomizing synthesis flame for synthesizing yttrium oxide powder is constructed at the outlet of the yttrium oxide synthesizer (15);

[0053] Step S3.4: Open the valve (35) on the wall-attached air branch pipe (33), so that a part of the air flows through the wall-attached air inlet pipe (20), and under the downward guiding action of the guiding plate (18), it flows vertically downward, and a layer of air film is constructed at the near-wall surface of the semi-circular cavity (19) and the lower near-wall area of the left vertical wall surface of the flame synthesis cavity (3), which helps the wall adhesion and consolidation of the wall high-temperature nano powder material;

[0054] Step S3.5: Under the suction action of the induced draft fan (12) on the inside of the flame synthesis cavity (3), the zirconia atomizing synthesis flame at the outlet of the zirconia synthesizer (13) and the yttrium oxide atomizing synthesis flame at the outlet of the yttrium oxide synthesizer (15) will turn upward and mix with each other, and then flow out from the upper outlet; during the mixing process of the high-temperature gas flow containing zirconia and yttrium oxide nano powder, the doping uniformity of yttrium and zirconium elements will be improved;

[0055] Step S3.6: At the same time, by adjusting the flame temperature at the outlet of the temperature-adjusting burner (9), the temperature of the mixing and sintering links of zirconia and yttrium oxide nano powder can be adjusted, further achieving the purpose of optimizing and improving the performance of the finally produced yttrium-stabilized zirconia nano powder material;

[0056] Step S3.7: The finally synthesized yttrium-stabilized zirconia nano powder material will be collected by the powder collector (11).

[0057] The beneficial effects of the present invention are as follows:

[0058] (1) Uniform doping and excellent product performance

[0059] In the present invention, the zirconia atomizing synthesis flame at the outlet of the zirconia synthesizer (13) and the yttrium oxide atomizing synthesis flame at the outlet of the yttrium oxide synthesizer (15) turn upward and mix with each other, and then flow out from the upper outlet. During the mixing process of the high-temperature gas flow containing zirconia and yttrium oxide nano powder materials, the doping uniformity of yttrium and zirconium elements will be improved, and the comprehensive performance of the yttrium-stabilized zirconia nano powder material will be improved.

[0060] (2) Simple process and suitable for large-scale continuous production

[0061] The present invention has the characteristics of simple process, fast reaction speed and continuous production, and is suitable for large-scale industrial preparation of yttrium-stabilized zirconia nanopowder materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0062] Figure 1 is a schematic structural diagram of the system of the present invention.

[0063] Figure 2 is a schematic structural diagram of the system of the present invention.

[0064] Figure 3 is a schematic structural diagram of the system of the present invention.

[0065] Figure 4 is a schematic diagram of the flame distribution and gas flow inside the flame synthesis chamber of the present invention.

[0066] Figure 5 is a schematic flow diagram of the method of the present invention.

[0067] Reference numerals include: 1 - flame controller; 2 - data transmission line; 3 - flame synthesis chamber; 4 - high-temperature observation window; 5 - infrared detection camera; 6 - thermocouple; 7 - temperature-adjustable fuel gas pipe; 8 - temperature-adjustable air pipe; 9 - temperature-adjustable burner; 10 - gas flow discharge pipe; 11 - powder collector; 12 - induced draft fan; 13 - zirconia synthesizer; 14 - zirconia atomizing nozzle; 15 - yttrium oxide synthesizer; 16 - yttrium oxide atomizing nozzle; 17 - igniter; 18 - deflector; 19 - semi-circular chamber; 20 - wall-attached air inlet pipe; 21 - zirconia air pipe; 22 - zirconia precursor pipe; 23 - zirconia combustible gas pipe; 24 - upper inclined arch; 25 - liquid flow pump; 26 - zirconia precursor tank; 27 - lower inclined arch; 28 - yttrium oxide air pipe; 29 - air compression storage tank; 30 - yttrium oxide precursor pipe; 31 - yttrium oxide combustible gas pipe; 32 - combustible gas cylinder; 33 - wall-attached air branch pipe; 34 - yttrium oxide precursor tank; 35 - valve. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0068] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments in the following description are only examples, and those skilled in the art can think of other obvious variations. The basic principles defined in the following description of the present invention can be applied to other embodiments, variations, improvements, equivalent embodiments, and other technical solutions without departing from the spirit and scope of the present invention.

[0069] In the preferred embodiments of the present invention, those skilled in the art should note that the raw materials and the like involved in the present invention can be regarded as prior art.

[0070] Preferred embodiments.

[0071] As Figures 1-3 shown, the present invention discloses a flame synthesis preparation system for yttrium-stabilized zirconia nanopowder materials, including a flame synthesis module, a raw material conveying module, and a powder collecting module, wherein:

[0072] The flame synthesis module includes a flame controller (1), a data transmission line (2), a flame synthesis chamber (3), a high-temperature observation window (4), an infrared detection camera (5), a thermocouple (6), a temperature-adjustable fuel gas pipe (7), a temperature-adjustable air pipe (8), a temperature-adjustable burner (9), and an air flow discharge pipe (10). The flame synthesis module is used to form a high-temperature flame and provide a synthesis preparation environment;

[0073] The raw material conveying module includes a zirconia synthesizer (13), a zirconia atomizing nozzle (14), a yttrium oxide synthesizer (15), a yttrium oxide atomizing nozzle (16), a zirconia air pipe (21), a zirconia precursor pipe (22), a zirconia combustible gas pipe (23), a liquid flow pump (25), a zirconia precursor tank (26), a yttrium oxide air pipe (28), an air compression storage tank (29), a yttrium oxide precursor pipe (30), a yttrium oxide combustible gas pipe (31), a combustible gas cylinder (32), an adhering wall air branch pipe (33), a yttrium oxide precursor tank (34), and a valve (35). The raw material conveying module is used to transfer each raw material to the flame synthesis chamber (3) and provide a corresponding atomized synthesis flame;

[0074] The powder collecting module includes a powder collector (11) and an induced draft fan (12). The powder collecting module is used to collect the yttrium-stabilized zirconia nanopowder materials contained in the air flow.

[0075] Specifically, the flame synthesis chamber (3) is a closed cavity for accommodating the atomized synthesis flame; the upper end of the flame synthesis chamber (3) is the outlet of the air flow containing yttrium-stabilized zirconia nanopowder materials, which is connected and communicated with the air flow discharge pipe (10); the powder collector (11) is connected to the middle of the air flow discharge pipe (10); the powder collector (11) is used to collect the yttrium-stabilized zirconia nanopowder materials discharged from the air flow discharge pipe (10);

[0076] The lower part of the flame synthesis chamber (3) is semi-cylindrical, forming a semi-cavity (19); the semi-cavity (19) facilitates the flow and guiding of the air flow inside;

[0077] One end of the air flow discharge pipe (10) that is not connected to the flame synthesis chamber (3) is connected with the induced draft fan (12); the induced draft fan (12) plays a suction role, and while sucking the air flow containing yttrium-stabilized zirconia nanopowder materials, it plays a role in constructing the negative pressure inside the flame synthesis chamber (3).

[0078] More specifically, at the upper part of the left side wall of the flame synthesis chamber (3), the high-temperature observation window (4) is installed; the high-temperature observation window (4) is rectangular, and the material is high-temperature resistant transparent quartz glass with a certain thickness;

[0079] On the outer side of the high-temperature observation window (4), the infrared detection camera (5) is provided; the infrared detection camera (5) is used to observe the flame morphology characteristics and flame stability inside the flame synthesis chamber (3) through the high-temperature observation window (4);

[0080] The infrared detection camera (5) is connected to the flame controller (1) through the data transmission line (2); at the middle part of the left side wall of the flame synthesis chamber (3), the thermocouple (6) is installed; the thermocouple (6) is used to monitor the temperature inside the flame synthesis chamber (3); the thermocouple (6) is connected to the flame controller (1) through the data transmission line (2);

[0081] The infrared detection camera (5) transmits the flame data to the flame controller (1); the infrared detection camera (5) transmits the flame data to the flame controller (1); the flame controller (1) analyzes the flame observation and temperature measurement data, and feeds back to each flow regulating valve, and automatically adjusts the flame shape, temperature distribution and flame stability;

[0082] At the middle part of the left side wall of the flame synthesis chamber (3), near the position of the thermocouple (6), the temperature regulating burner (9) is installed; the temperature regulating burner (9) is used to form a high-temperature flame, so as to adjust the mixing and sintering temperature environment of zirconia powder and yttria powder.

[0083] Furthermore, on the right side wall of the flame synthesis chamber (3), the upper inclined arch (24) and the lower inclined arch (27) are arranged adjacent to each other from top to bottom;

[0084] The upper inclined arch (24) and the lower inclined arch (27) have the same shape and size, and are both inclined single-step type structures;

[0085] On the upper inclined wall surface of the upper inclined arch (24), the zirconia synthesizer (13) is vertically installed; at the central position of the zirconia synthesizer (13), the zirconia atomizing nozzle (14) is coaxially arranged;

[0086] On the upper inclined wall surface of the lower inclined arch (27), the yttria synthesizer (15) is vertically installed; at the central position of the yttria synthesizer (15), the yttria atomizing nozzle (16) is coaxially arranged;

[0087] At the lower part of the right side wall of the flame synthesis chamber (3), near the lower edge of the lower inclined arch (27), a wall-attached air inlet pipe (20) is installed perpendicular to the right side wall of the flame synthesis chamber (3);

[0088] On the lower inclined wall surface of the lower inclined arch (27), an igniter (17) is vertically installed through the middle of the wall surface. The igniter (17) is used to ignite the flame inside the flame synthesis chamber (3);

[0089] Inside the flame synthesis chamber (3), at the outlet of the wall-attached air inlet pipe (20), a flow guide plate (18) is provided; the flow guide plate (18) is in the shape of an inverted capital L and covers the outlet area of the wall-attached air inlet pipe (20).

[0090] Furthermore, the yttrium oxide precursor tank (34) is used to store the precursor solution for yttrium oxide atomization flame synthesis; the zirconium oxide precursor tank (26) is used to store the precursor solution for zirconium oxide atomization flame synthesis; the air compression storage tank (29) is used to store compressed air; the combustible gas cylinder (32) is used to store fuel gas, and the fuel gas can be combustible gases such as methane and propane;

[0091] One end of the temperature-controlled fuel gas pipe (7) is connected to the fuel gas port at the center of the temperature-controlled burner (9); the other end of the temperature-controlled fuel gas pipe (7) is connected to the combustible gas cylinder (32); a valve (35) is provided on the temperature-controlled fuel gas pipe (7) for adjusting the air flow rate; the temperature-controlled fuel gas pipe (7) is used for circulating combustible gas;

[0092] One end of the temperature-controlled air pipe (8) is connected to the air port on the outer ring of the temperature-controlled burner (9); the other end of the temperature-controlled air pipe (8) is connected to the air compression storage tank (29); a valve (35) is provided on the temperature-controlled air pipe (8) for adjusting the air flow rate; the temperature-controlled air pipe (8) is used for circulating air;

[0093] One end of the wall-attached air branch pipe (33) is connected to the wall-attached air inlet pipe (20); the other end of the wall-attached air branch pipe (33) is connected to the temperature-controlled air pipe (8); a valve (35) is provided on the wall-attached air branch pipe (33) for adjusting the air flow rate; the wall-attached air branch pipe (33) is used for circulating air;

[0094] One end of the yttrium oxide precursor tube (30) is connected to the yttrium oxide atomizing nozzle (16); the other end of the yttrium oxide precursor tube (30) is connected to the yttrium oxide precursor tank (34); a valve (35) is provided on the yttrium oxide precursor tube (30) for regulating the liquid flow rate; the yttrium oxide precursor tube (30) is used for circulating the yttrium oxide precursor solution; a liquid flow pump (25) is provided on the yttrium oxide precursor tube (30) for boosting the liquid flow.

[0095] One end of the zirconium oxide precursor tube (22) is connected to the zirconium oxide atomizing nozzle (14); the other end of the zirconium oxide precursor tube (22) is connected to the zirconium oxide precursor tank (26); a valve (35) is provided on the zirconium oxide precursor tube (22) for regulating the liquid flow rate; the zirconium oxide precursor tube (22) is used for circulating the zirconium oxide precursor solution; a liquid flow pump (25) is provided on the zirconium oxide precursor tube (22) for boosting the liquid flow.

[0096] Preferably, one end of the zirconium oxide air tube (21) is connected to the outer annular air port of the zirconium oxide synthesizer (13); the other end of the zirconium oxide air tube (21) is connected to the air compression storage tank (29); a valve (35) is provided on the zirconium oxide air tube (21) for regulating the air flow rate; the zirconium oxide air tube (21) is used for circulating air.

[0097] One end of the zirconium oxide combustible gas tube (23) is connected to the outer annular fuel gas port of the zirconium oxide synthesizer (13); the other end of the zirconium oxide combustible gas tube (23) is connected to the combustible gas cylinder (32); a valve (35) is provided on the zirconium oxide combustible gas tube (23) for regulating the gas flow rate; the zirconium oxide combustible gas tube (23) is used for circulating fuel gas.

[0098] One end of the yttrium oxide air tube (28) is connected to the outer annular air port of the yttrium oxide synthesizer (15); the other end of the yttrium oxide air tube (28) is connected to the air compression storage tank (29); a valve (35) is provided on the yttrium oxide air tube (28) for regulating the air flow rate; the yttrium oxide air tube (28) is used for circulating air.

[0099] One end of the yttrium oxide combustible gas pipe (31) is connected to the outer annular fuel gas port located on the yttrium oxide synthesizer (15); the other end of the yttrium oxide combustible gas pipe (31) is connected to the combustible gas cylinder (32); a valve (35) is provided on the yttrium oxide combustible gas pipe (31) for regulating the gas flow rate; the yttrium oxide combustible gas pipe (31) is used for circulating fuel gas.

[0100] As Figures 4-5 shown, the present invention also discloses a flame synthesis preparation method for yttria-stabilized zirconia nanopowder materials, including the following steps:

[0101] Step 1: Prepare a precursor solution for the atomization synthesis of zirconia nanopowder;

[0102] Step 2: Prepare a precursor solution for the atomization synthesis of yttrium oxide nanopowder;

[0103] Step 3: Atomize and synthesize yttria-stabilized zirconia powder materials.

[0104] Specifically, Step 1 is specifically implemented as follows:

[0105] Step S1.1: Select a zirconium source, which includes but is not limited to zirconium oxychloride, zirconium chloride, zirconium nitrate, zirconium isopropoxide, etc.;

[0106] Step S1.2: Dissolve the zirconium source in a solvent (including but not limited to ethanol, propanol, acetic acid, butyric acid, caprylic acid, etc.) to ensure complete dissolution;

[0107] Step S1.3: Add organic dispersants such as polyvinylpyrrolidone and oleic acid amide to improve the solution stability and powder dispersibility;

[0108] Step S1.4: Add a small amount of ammonia water solution to the solution to adjust the pH value to make the solution acidic, with the pH value between 1 and 5, to control the hydrolysis and polycondensation reactions in the solution.

[0109] More specifically, Step 2 is specifically implemented as follows:

[0110] Step S2.1: Select a yttrium source, which includes but is not limited to yttrium nitrate or yttrium chloride;

[0111] Step S2.2: Dissolve the yttrium source in a solvent (including but not limited to ethanol, propanol, acetic acid, butyric acid, caprylic acid, etc.) to ensure complete dissolution;

[0112] Step S2.3: Add organic dispersants such as polyvinylpyrrolidone and oleic acid amide to improve the solution stability and powder dispersibility;

[0113] Step S2.4: Add a small amount of ammonia water solution into the solution to adjust the pH value to make the solution acidic, with the pH value between 1 and 5, so as to control the hydrolysis and polycondensation reactions in the solution.

[0114] Furthermore, the specific implementation of step three is as follows:

[0115] Step S3.1: Open the zirconia air pipe (21) and zirconia combustible gas pipe (23) connected to the zirconia synthesizer (13), and at the same time, open the yttria combustible gas pipe (31) and yttria air pipe (28) connected to the yttria synthesizer (15);

[0116] Step S3.2: Start the igniter (17) to ignite the combustible gas and construct a duty flame at the outlet of the zirconia synthesizer (13) and a duty flame at the outlet of the yttria synthesizer (15);

[0117] Step S3.3: Open the zirconia precursor pipe (22) and zirconia atomizing nozzle (14), and at the same time, open the yttria precursor pipe (30) and yttria atomizing nozzle (16), so as to form a zirconia precursor atomizing jet and a yttria precursor atomizing jet at the outlets of the zirconia atomizing nozzle (14) and the yttria atomizing nozzle (16) respectively; thus, an atomizing synthesis flame for synthesizing zirconia powder is constructed at the outlet of the zirconia synthesizer (13), and an atomizing synthesis flame for synthesizing yttria powder is constructed at the outlet of the yttria synthesizer (15);

[0118] Step S3.4: Open the valve (35) on the wall-attached air branch pipe (33) to allow a part of the air to flow through the wall-attached air inlet pipe (20). Under the downward guiding action of the guide plate (18), it flows vertically downward, and a layer of air film is constructed near the wall surface of the semi-circular cavity (19) and in the near-wall area at the lower part of the left vertical wall surface of the flame synthesis cavity (3), which helps the wall adhesion and consolidation of the wall surface high-temperature nano powder material;

[0119] Step S3.5: Under the suction action of the induced draft fan (12) on the inside of the flame synthesis cavity (3), the zirconia atomizing synthesis flame at the outlet of the zirconia synthesizer (13) and the yttria atomizing synthesis flame at the outlet of the yttria synthesizer (15) will turn upward and mix with each other, and then flow out from the upper outlet; during the mixing process of the high-temperature gas flow containing zirconia and yttria nano powder, the doping uniformity of yttrium and zirconium elements will be improved;

[0120] Step S3.6: At the same time, by adjusting the flame temperature at the outlet of the temperature-adjusting burner (9), the temperature of the mixing and sintering links of the zirconia and yttria nano powder can be adjusted, further achieving the purpose of optimizing and improving the performance of the finally generated yttrium-stabilized zirconia nano powder material;

[0121] Step S3.7: The finally synthesized yttrium-stabilized zirconia nanopowder material will be collected by the powder collector (11).

[0122] It is worth mentioning that the technical features such as the raw materials involved in this invention patent application should be regarded as the prior art. The specific structures, working principles, and possible control methods and spatial arrangement methods of these technical features can be selected conventionally in the art and should not be regarded as the inventive points of this invention patent. This invention patent will not be further specifically elaborated.

[0123] For those skilled in the art, it is still possible to modify the technical solutions described in the foregoing embodiments or perform equivalent replacements on some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A flame synthesis preparation system for yttrium-stabilized zirconia nanopowder materials, characterized in that, It includes a flame synthesis module, a raw material delivery module, and a powder collection module, where: The flame synthesis module includes a flame controller (1), a data transmission line (2), a flame synthesis chamber (3), a high-temperature observation window (4), an infrared detection camera (5), a thermocouple (6), a temperature-adjustable fuel gas pipe (7), a temperature-adjustable air pipe (8), a temperature-adjustable burner (9), and an air flow discharge pipe (10). The flame synthesis module is used to form a high-temperature flame and provide a synthesis preparation environment; The raw material delivery module includes a zirconia synthesizer (13), a zirconia atomizing nozzle (14), a yttria synthesizer (15), a yttria atomizing nozzle (16), a zirconia air pipe (21), a zirconia precursor pipe (22), a zirconia combustible gas pipe (23), a liquid flow pump (25), a zirconia precursor tank (26), a yttria air pipe (28), an air compression storage tank (29), a yttria precursor pipe (30), a yttria combustible gas pipe (31), a combustible gas cylinder (32), an attached wall air branch pipe (33), a yttria precursor tank (34), and a valve (35). The raw material delivery module is used to transport each raw material to the flame synthesis chamber (3) and provide a corresponding atomized synthesis flame; The powder collection module includes a powder collector (11) and an induced draft fan (12). The powder collection module is used to collect the yttria-stabilized zirconia nanopowder material contained in the air flow.

2. The flame synthesis preparation system of a yttrium-stabilized zirconia nanopowder material according to claim 1, characterized in that, The flame synthesis chamber (3) is a closed cavity for accommodating the atomized synthesis flame; the upper end of the flame synthesis chamber (3) is the outlet of the air flow containing the yttria-stabilized zirconia nanopowder material, which is connected and communicated with the air flow discharge pipe (10); the powder collector (11) is connected to the middle of the air flow discharge pipe (10); the powder collector (11) is used to collect the yttria-stabilized zirconia nanopowder material discharged from the air flow discharge pipe (10); The lower part of the flame synthesis chamber (3) is semi-cylindrical, forming a semi-cavity (19); the semi-cavity (19) facilitates the flow and guiding of the air flow inside; One end of the air flow discharge pipe (10) that is not connected to the flame synthesis chamber (3) is connected to the induced draft fan (12); the induced draft fan (12) plays a suction role, and while sucking the air flow containing the yttria-stabilized zirconia nanopowder material, it plays a role in constructing the negative pressure inside the flame synthesis chamber (3).

3. The flame synthesis preparation system of a yttrium-stabilized zirconia nanopowder material according to claim 2, characterized in that, The high-temperature observation window (4) is installed on the upper part of the left side wall of the flame synthesis chamber (3); The infrared detection camera (5) is arranged outside the high-temperature observation window (4); the infrared detection camera (5) is used to observe the flame morphology characteristics and flame stability inside the flame synthesis chamber (3) through the high-temperature observation window (4); The infrared detection camera (5) is connected to the flame controller (1) through the data transmission line (2); in the middle of the left side wall surface of the flame synthesis chamber (3), the thermocouple (6) is installed; the thermocouple (6) is used to monitor the temperature inside the flame synthesis chamber (3); the thermocouple (6) is connected to the flame controller (1) through the data transmission line (2); The infrared detection camera (5) transmits the flame data to the flame controller (1); the infrared detection camera (5) transmits the flame data to the flame controller (1); the flame controller (1) analyzes the flame observation and temperature measurement data and feeds it back to each flow regulating valve to automatically adjust the flame shape, temperature distribution and flame stability; On the middle of the left side wall surface of the flame synthesis chamber (3), near the position of the thermocouple (6), the temperature regulating burner (9) is installed; the temperature regulating burner (9) is used to form a high-temperature flame, so as to adjust the mixing and sintering temperature environment of zirconia powder and yttria powder.

4. The flame synthesis preparation system of a yttrium-stabilized zirconia nano-powder material according to claim 3, characterized in that, On the right side wall surface of the flame synthesis chamber (3), the upper inclined arch (24) and the lower inclined arch (27) are arranged adjacent to each other from top to bottom; The upper inclined arch (24) and the lower inclined arch (27) have the same shape and size, and are both inclined single-step structures; On the upper inclined wall surface of the upper inclined arch (24), the zirconia synthesizer (13) is vertically installed; at the central position of the zirconia synthesizer (13), the zirconia atomizing nozzle (14) is coaxially arranged; On the upper inclined wall surface of the lower inclined arch (27), the yttria synthesizer (15) is vertically installed; at the central position of the yttria synthesizer (15), the yttria atomizing nozzle (16) is coaxially arranged; At the lower part of the right side wall surface of the flame synthesis chamber (3), near the lower edge position of the lower inclined arch (27), perpendicular to the right side wall surface of the flame synthesis chamber (3), the wall-attached air inlet pipe (20) is installed; On the lower inclined wall surface of the lower inclined arch (27), the igniter (17) is vertically installed through the middle of the wall surface, and the igniter (17) is used to ignite the flame inside the flame synthesis chamber (3); Inside the flame synthesis chamber (3), right in front of the outlet of the wall-attached air inlet pipe (20), the guide plate (18) is arranged; the guide plate (18) is in an inverted capital L shape and covers the outlet area of the wall-attached air inlet pipe (20).

5. The flame synthesis preparation system of a yttrium-stabilized zirconia nanopowder material according to claim 4, characterized in that, The yttria precursor tank (34) is used to store the precursor solution for yttria atomized flame synthesis; the zirconia precursor tank (26) is used to store the precursor solution for zirconia atomized flame synthesis; the air compression storage tank (29) is used to store compressed air; the combustible gas cylinder (32) is used to store fuel gas; One end of the temperature-adjusting fuel gas pipe (7) is connected to the fuel gas port located at the center of the temperature-adjusting burner (9); the other end of the temperature-adjusting fuel gas pipe (7) is connected to the combustible gas cylinder (32); a valve (35) is provided on the temperature-adjusting fuel gas pipe (7) for adjusting the air flow rate; the temperature-adjusting fuel gas pipe (7) is used for circulating combustible gas; One end of the temperature-adjusting air pipe (8) is connected to the air port in an annular shape outside the temperature-adjusting burner (9); the other end of the temperature-adjusting air pipe (8) is connected to the air compression storage tank (29); a valve (35) is provided on the temperature-adjusting air pipe (8) for adjusting the air flow rate; the temperature-adjusting air pipe (8) is used for circulating air; One end of the wall-attached air branch pipe (33) is connected to the wall-attached air inlet pipe (20); the other end of the wall-attached air branch pipe (33) is connected to the temperature-adjusting air pipe (8); a valve (35) is provided on the wall-attached air branch pipe (33) for adjusting the air flow rate; the wall-attached air branch pipe (33) is used for circulating air; One end of the yttrium oxide precursor pipe (30) is connected to the yttrium oxide atomizing nozzle (16); the other end of the yttrium oxide precursor pipe (30) is connected to the yttrium oxide precursor tank (34); a valve (35) is provided on the yttrium oxide precursor pipe (30) for adjusting the liquid flow rate; the yttrium oxide precursor pipe (30) is used for circulating the yttrium oxide precursor solution; a liquid flow pump (25) is provided on the yttrium oxide precursor pipe (30) for boosting the liquid flow; One end of the zirconium oxide precursor pipe (22) is connected to the zirconium oxide atomizing nozzle (14); the other end of the zirconium oxide precursor pipe (22) is connected to the zirconium oxide precursor tank (26); a valve (35) is provided on the zirconium oxide precursor pipe (22) for adjusting the liquid flow rate; the zirconium oxide precursor pipe (22) is used for circulating the zirconium oxide precursor solution; a liquid flow pump (25) is provided on the zirconium oxide precursor pipe (22) for boosting the liquid flow.

6. The flame synthesis preparation system of a yttrium-stabilized zirconia nanopowder material according to claim 5, characterized in that, One end of the zirconium oxide air pipe (21) is connected to the air port in an annular shape outside the zirconium oxide synthesizer (13); the other end of the zirconium oxide air pipe (21) is connected to the air compression storage tank (29); a valve (35) is provided on the zirconium oxide air pipe (21) for adjusting the air flow rate; the zirconium oxide air pipe (21) is used for circulating air; One end of the zirconium oxide combustible gas pipe (23) is connected to the fuel gas port in an annular shape outside the zirconium oxide synthesizer (13); the other end of the zirconium oxide combustible gas pipe (23) is connected to the combustible gas cylinder (32); a valve (35) is provided on the zirconium oxide combustible gas pipe (23) for adjusting the air flow rate; the zirconium oxide combustible gas pipe (23) is used for circulating fuel gas; One end of the yttrium oxide air pipe (28) is connected to the outer annular air port of the yttrium oxide synthesizer (15); the other end of the yttrium oxide air pipe (28) is connected to the air compression storage tank (29); a valve (35) is provided on the yttrium oxide air pipe (28) for regulating the air flow; the yttrium oxide air pipe (28) is used for air circulation; One end of the yttrium oxide combustible gas pipe (31) is connected to the outer annular fuel gas port of the yttrium oxide synthesizer (15); the other end of the yttrium oxide combustible gas pipe (31) is connected to the combustible gas cylinder (32); a valve (35) is provided on the yttrium oxide combustible gas pipe (31) for regulating the gas flow; the yttrium oxide combustible gas pipe (31) is used for fuel gas circulation.

7. A flame synthesis preparation method of yttrium-stabilized zirconia nanopowder material, applied to a flame synthesis preparation system of a yttrium-stabilized zirconia nanopowder material according to any one of claims 1-6, characterized in that, It includes the following steps: Step 1: Configure the precursor solution for the atomization synthesis of zirconia nanopowder; Step 2: Configure the precursor solution for the atomization synthesis of yttrium oxide nanopowder; Step 3: Atomize and synthesize the yttrium-stabilized zirconia powder material.

8. The flame synthesis preparation method of a yttrium-stabilized zirconia nano-powder material according to claim 7, characterized in that, Step 1 is specifically implemented as: Step S1.1: Select a zirconium source; Step S1.2: Dissolve the zirconium source in a solvent to ensure complete dissolution; Step S1.3: Add an organic dispersant to improve the solution stability and powder dispersibility; Step S1.4: Add a small amount of ammonia water solution to the solution to adjust the pH value to make the solution acidic, so as to control the hydrolysis and polycondensation reactions in the solution.

9. The flame synthesis preparation method of a yttrium-stabilized zirconia nanopowder material according to claim 8, characterized in that, Step 2 is specifically implemented as: Step S2.1: Select a yttrium source; Step S2.2: Dissolve the yttrium source in a solvent to ensure complete dissolution; Step S2.3: Add an organic dispersant to improve the solution stability and powder dispersibility; Step S2.4: Add a small amount of ammonia water solution to the solution to adjust the pH value to make the solution acidic, so as to control the hydrolysis and polycondensation reactions in the solution.

10. The flame synthesis preparation method of a yttrium-stabilized zirconia nanopowder material according to claim 9, characterized in that, Step 3 is specifically implemented as: Step S3.1: Open the zirconia air pipe (21) and zirconia combustible gas pipe (23) connected to the zirconia synthesizer (13), and at the same time open the yttrium oxide combustible gas pipe (31) and yttrium oxide air pipe (28) connected to the yttrium oxide synthesizer (15); Step S3.2: Start the igniter (17) to ignite the combustible gas, and construct a pilot flame at the outlet of the zirconia synthesizer (13) and a pilot flame at the outlet of the yttrium oxide synthesizer (15); Step S3.3: Open the zirconia precursor pipe (22) and zirconia atomizing nozzle (14), and at the same time open the yttrium oxide precursor pipe (30) and yttrium oxide atomizing nozzle (16), so as to respectively form a zirconia precursor atomizing jet and a yttrium oxide precursor atomizing jet at the outlets of the zirconia atomizing nozzle (14) and the yttrium oxide atomizing nozzle (16); thus, an atomizing synthesis flame for synthesizing zirconia powder is constructed at the outlet of the zirconia synthesizer (13), and an atomizing synthesis flame for synthesizing yttrium oxide powder is constructed at the outlet of the yttrium oxide synthesizer (15); Step S3.4: Open the valve (35) located on the wall-attached air branch pipe (33) to allow a part of the air to flow through the wall-attached air inlet pipe (20). Under the downward diversion of the deflector (18), it flows vertically downward and forms an air film near the wall surface of the semi-circular cavity (19) and in the near-wall area at the lower part of the left vertical wall surface of the flame synthesis cavity (3), which helps the wall adhesion and consolidation of the wall high-temperature nano powder material; Step S3.5: Under the suction of the induced draft fan (12) on the inside of the flame synthesis cavity (3), the zirconia atomization synthesis flame at the outlet of the zirconia synthesizer (13) and the yttria atomization synthesis flame at the outlet of the yttrium synthesizer (15) will turn upward and mix with each other, and then flow out from the upper outlet; during the mixing process of the high-temperature gas flow containing zirconia and yttria nano powder, the doping uniformity of yttrium and zirconium elements will be improved; Step S3.6: At the same time, by adjusting the flame temperature at the outlet of the temperature-regulating burner (9), the temperature of the mixing and sintering links of zirconia and yttria nano powder can be adjusted, further achieving the purpose of optimizing and improving the performance of the finally generated yttrium-stabilized zirconia nano powder material; Step S3.7: The finally synthesized yttrium-stabilized zirconia nano powder material will be collected by the powder collector (11).

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