A continuous high-temperature reaction device and method for synthesizing strontium titanate powder

Abstract

This invention discloses a continuous high-temperature reaction apparatus and method for the synthesis of strontium titanate powder. It effectively improves the purity and performance of the synthesized strontium titanate powder, while achieving precise control of multiple temperature zones. This allows for gradual temperature increase and holding during synthesis, and separates the heating and holding processes for simultaneous operation. It also enables continuous feeding and quantitative delivery of raw materials, effectively ensuring continuous synthesis capabilities. Furthermore, the invention is equipped with an atmosphere protection system to effectively control oxygen partial pressure, significantly improving product purity. Each main heating rod and auxiliary heating rod on each heating block is connected to a unit controller, improving the uniformity and stability of heating and achieving precise temperature control.

Description

Technical Field

[0001] Specifically, this invention relates to a continuous high-temperature reaction apparatus and method for the synthesis of strontium titanate powder, and is situated in the field of auxiliary equipment for the synthesis of strontium titanate powder. Background Technology

[0002] Strontium titanate (SrTiO3), as an electronic functional material with a perovskite structure, possesses excellent application properties such as high dielectric constant, low loss, and outstanding thermal stability. It demonstrates superior market prospects compared to traditional materials in multiple fields, including electronics, optoelectronics, and magnetic materials. However, the physical properties of strontium titanate powder, including chemical composition, structure, shape, size, and crystallinity, significantly impact its final application performance. With the increasing demand for high-performance strontium titanate functional materials across various industries, the preparation of uniform, high-purity, and stoichiometric perovskite strontium titanate powder has become a key focus of research. This process requires in-depth exploration and optimization of the preparation process to obtain high-quality strontium titanate powder and promote its application in electronics, optoelectronics, and magnetic materials.

[0003] Currently, the mainstream preparation methods for strontium titanate include liquid-phase precipitation, hydrothermal methods, and sol-gel methods. Among these, the sol-gel method is currently the most widely used. For example, patent CN1472169A discloses a process for preparing nanoscale high-purity strontium titanate powder. This process involves adding a strontium source to a prepared orthotitanate gel to form a mixture. The mixture is then placed in a reaction vessel and heated until it reaches a constant temperature (e.g., 220-270℃). The pressure and protective gas atmosphere are controlled, and the temperature is maintained for 10-15 hours to ensure a complete reaction. The heating rate is strictly controlled during the heating process. However, in actual production, the heating rate (…) For example, excessively rapid heating can affect the purity, shape, structure, and other properties of the final strontium titanate. Moreover, it is difficult to achieve continuous preparation and reaction using ordinary heating equipment, thus making continuous production impossible. At the same time, due to the long holding time at the same temperature, the reaction rate is uneven. Prolonged excessively high or insufficient temperatures will lead to a decrease in the performance of the prepared strontium titanate. In addition, the utilization rate of the equipment is low due to the long holding time. Furthermore, precise temperature control plays an important role in the preparation of high-purity, high-performance strontium titanate. Summary of the Invention

[0004] Therefore, in order to overcome the above-mentioned shortcomings, the present invention provides a continuous high-temperature reaction apparatus for the synthesis of strontium titanate powder.

[0005] This invention is implemented by constructing a continuous high-temperature reaction device for the synthesis of strontium titanate powder, comprising a first-end heating chamber assembly, an intermediate heating chamber assembly, a last-end heating chamber assembly, a quantitative feeding assembly, and a connecting pipe assembly. The output end of the quantitative feeding assembly is connected to the initial input pipe of the first-end heating chamber assembly via a feeding pipeline. The invention is characterized in that at least one intermediate heating chamber assembly is provided between the first-end heating chamber assembly and the last-end heating chamber assembly. The heating temperature in the first-end heating chamber assembly, the intermediate heating chamber assembly, and the last-end heating chamber assembly increases sequentially. The first-end heating chamber assembly is connected to the uppermost intermediate heating chamber assembly via a connecting pipe assembly, adjacent intermediate heating chamber assemblies are connected via connecting pipe assemblies, and the lowermost intermediate heating chamber assembly is connected to the last-end heating chamber assembly via a connecting pipe assembly. The connecting pipe assembly enables quantitative delivery of the heated material. The last-end heating chamber assembly is also provided with a discharge pipe assembly. Furthermore, a protective atmosphere supply pipeline is connected to each of the first-end heating chamber assembly, intermediate heating chamber assembly, and last-end heating chamber assembly.

[0006] Furthermore, as a preferred embodiment, the first heating box assembly, the middle heating box assembly, and the last heating box assembly have the same structure and are stacked vertically. Each of the first heating box assembly, the middle heating box assembly, and the last heating box assembly includes a heating buffer chamber and a temperature holding chamber. The heating buffer chamber and the temperature holding chamber are arranged vertically at intervals. The heating buffer chamber is also connected to the adjacent temperature holding chamber below it by a connecting pipe assembly. The temperature in the heating buffer chamber is designed to heat up at a uniform rate and cool down rapidly. The temperature in the temperature holding chamber is equal to the temperature of the heating buffer chamber located above it after heating. The heating rate of the uniform heating is no more than 10°C per minute.

[0007] Furthermore, as a preferred embodiment, each of the heating buffer chambers and temperature holding chambers is provided with a heating assembly on its peripheral wall. Each heating assembly includes multiple heating units arranged in an array. Each heating unit of each heating assembly is individually controlled by a unit controller, and each unit controller is controlled by a master controller. Each heating unit is provided with a temperature sensor, and the temperature sensor is connected to the unit controller for feedback control.

[0008] Furthermore, preferably, each heating unit includes a heat-conducting actuator plate, a heating block, and a heat insulation plate. The heat-conducting actuator plate is disposed facing the heating buffer chamber and the temperature holding chamber. The heating block is fitted and abutted against the end of the heat-conducting actuator plate away from the heating buffer chamber and the temperature holding chamber. The heat insulation plate is fixedly disposed on the side of the heating block away from the heat-conducting actuator plate. An electric heating component is disposed inside the heating block. The temperature sensor is arranged inside the heat-conducting actuator plate and / or the heating block.

[0009] Furthermore, preferably, the electric heating assembly includes multiple main heating rods and multiple auxiliary heating rods. Multiple perforations are spaced along the length of the heating block, with one main heating rod arranged in each perforation. Multiple auxiliary holes are arranged along the thickness of the heating block, with one auxiliary heating rod inserted into each auxiliary hole. The number of auxiliary heating rods is at least five times the number of main heating rods. The thickness direction is from the heating block towards the insulation plate. Each main heating rod and each auxiliary heating rod on each heating block is connected to a unit controller.

[0010] Furthermore, preferably, the connecting pipe assembly includes a U-shaped connecting pipe, a first switching valve, a second switching valve, and a first protective gas connector. The upper end of the U-shaped connecting pipe is connected to the output end of the heating buffer chamber or the output end of the temperature holding chamber, and the lower end of the U-shaped connecting pipe is connected to the input end of the heating buffer chamber or the input end of the temperature holding chamber. The first switching valve is provided at the upper end of the U-shaped connecting pipe, and the second switching valve is provided at the lower end of the U-shaped connecting pipe. A first protective gas connector arranged on the U-shaped connecting pipe is provided between the first switching valve and the second switching valve.

[0011] Furthermore, as a preferred embodiment, the connecting pipe assembly further includes a second protective gas connector, which is connected to the U-shaped connecting pipe and arranged between the first switching valve and the second switching valve. The second protective gas connector is arranged near the second switching valve, and the first protective gas connector is arranged near the first switching valve.

[0012] Furthermore, as a preferred embodiment, a spare connector is also provided on the U-shaped connecting pipe between the first protective gas connector and the second protective gas connector. The spare connector is equipped with an on / off valve. The spare connector, the first protective gas connector, and the second protective gas connector are arranged in parallel on the U-shaped connecting pipe.

[0013] Furthermore, as a preferred embodiment, the housings of the first heating box assembly, the middle heating box assembly, and the last heating box assembly are provided with inlet holes and outlet holes. The inlet holes and outlet holes are connected to the heating buffer chamber or the temperature holding chamber. The heating buffer chamber and the temperature holding chamber are both conical structures with a larger upper end and a smaller lower end. The inlet holes are arranged horizontally, and the outlet holes are arranged inclined downwards.

[0014] Furthermore, the present invention also provides a reaction method for a continuous high-temperature reaction apparatus for the synthesis of strontium titanate powder, characterized in that: it employs the continuous high-temperature reaction apparatus for the synthesis of strontium titanate powder described in the present invention, and includes the following steps:

[0015] (1) Protective gas filling: Evacuate the heating buffer heating chamber and temperature holding chamber of the first heating box assembly, the middle heating box assembly and the end heating box assembly, and fill them with protective gas, which is nitrogen or inert gas.

[0016] (2) Feeding: Connect the output end of the quantitative feeding component to the initial input pipe of the first heating box component through the feeding pipeline, and add a quantitative amount of material into the heating buffer heating chamber of the first heating box component using the quantitative feeding component;

[0017] (3) Start heating: Start the heating components of the first heating box assembly, the middle heating box assembly, and the end heating box assembly to heat them to their respective target temperatures;

[0018] (4) Gradual heating: After the temperature in the heating buffer heating chamber of the first heating box assembly reaches the target temperature, the target temperature in the heating buffer heating chamber is equal to the holding temperature in the adjacent temperature holding chamber below it. Open the first switch valve and the second switch valve so that the material in the heating buffer heating chamber of the first heating box assembly automatically flows into the temperature holding chamber of the first heating box assembly. At the same time, the opening and closing of the first switch valve and the second switch valve, as well as the first protective gas connector and the second protective gas connector, are used to press the remaining material in the connecting pipe assembly into the temperature holding chamber of the first heating box assembly.

[0019] (5) Heating and material discharge: The temperature in the heating buffer heating chamber is reduced to the holding temperature in the adjacent temperature holding chamber above it. Steps (2)-(4) are repeated so that the material is discharged after passing through the heating buffer heating chamber of each intermediate heating box assembly, the temperature holding chamber of the intermediate heating box assembly, the heating buffer heating chamber of the end heating box assembly, and the temperature holding chamber of the end heating box assembly.

[0020] The present invention has the following advantages: The continuous high-temperature reaction equipment for the synthesis of strontium titanate powder provided by the present invention has the following advantages compared with similar equipment:

[0021] (1) The continuous high-temperature reaction equipment for the synthesis of strontium titanate powder described in this invention can effectively improve the purity and performance of the synthesized strontium titanate powder. At the same time, it realizes precise control of multiple temperature zones, realizes the gradual increase and heat preservation of temperature during synthesis, and sets the heating and heat preservation separately so that the heating and heat preservation can be carried out simultaneously. It can realize the continuous feeding and quantitative delivery of raw materials, effectively ensuring the ability of continuous synthesis preparation. In addition, this invention is equipped with an atmosphere protection system to effectively control the oxygen partial pressure, which can significantly improve the purity of the product.

[0022] (2) The temperature of the present invention can effectively ensure the control accuracy. The heating component includes multiple heating units arranged in a row. Each heating unit of each heating component is controlled by a unit controller. Each unit controller is controlled by a master controller. Each heating unit is equipped with a temperature sensor. The temperature sensor is connected to the unit controller for feedback control, which improves the control accuracy and reliability. In addition, the heating block is equipped with multiple main heating rods and multiple auxiliary heating rods. The number of auxiliary heating rods is at least five times the number of main heating rods. The thickness direction is from the heating block toward the insulation plate. Each main heating rod and each auxiliary heating rod on each heating block is connected to the unit controller for control, which can improve the uniformity and stability of heating of the heating block and realize precise control of heating temperature.

[0023] (3) By setting up a connecting pipe assembly, the present invention allows the material to pass through the heating step of the heating buffer heating chamber of the first heating box assembly, the temperature holding step of the temperature holding chamber of the first heating box assembly, the heating step of the heating buffer heating chamber of the middle heating box assembly, the temperature holding step of the temperature holding chamber of the middle heating box assembly, the heating step of the heating buffer heating chamber of the end heating box assembly, and the temperature holding step of the temperature holding chamber of the end heating box assembly before being discharged. This achieves multi-segment temperature control, effectively realizes continuous feeding and quantitative conveying, and improves the synthesis and preparation capabilities. Attached Figure Description

[0024] Figure 1 This is a top-view schematic diagram of the overall structure of the present invention;

[0025] Figure 2 This is a schematic diagram of the structure of the front heating box assembly of the present invention;

[0026] Figure 3 This is a partial structural schematic diagram of the heating assembly of the present invention;

[0027] Figure 4 This is a schematic diagram of the disassembled structure of the heating unit of the present invention;

[0028] Figure 5 This is a schematic diagram of the heating block of the present invention;

[0029] Figure 6 This is a schematic diagram of the connecting pipe assembly of the present invention;

[0030] Figure 7 This is a cross-sectional view of the heating chamber or temperature holding chamber of the present invention.

[0031] The components are as follows: 1. First heating box assembly; 2. Connecting pipe assembly; 3. Initial input pipe; 4. Feed line; 5. Quantitative feeding assembly; 6. Intermediate heating box assembly; 7. End heating box assembly; 8. Discharge pipe assembly; 9. Protective atmosphere supply line; 10. Heating buffer chamber; 11. Temperature holding chamber; 12. Secondary hole; 13. Arrangement perforation; 14. Secondary protective gas connector; 15. On / off valve; 16. Thermally conductive actuator plate; 17. Secondary heating rod; 18. Heating block; 19. Main heating rod; 20. Insulation plate; 21. Heating unit; 22. First switching valve; 23. First protective gas connector; 24. U-shaped connecting pipe; 25. Spare connector; 26. Secondary switching valve; 27. Box body; 28. Feed port; 29. ​​Heating assembly; 30. Chamber; 31. Discharge port. Detailed Implementation

[0032] The following will be combined with the appendix Figure 1-7 This invention will be described in detail, and the technical solutions in the embodiments of this invention will be clearly and completely described. Obviously, the described embodiments are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0033] This invention provides an improved continuous high-temperature reaction apparatus for the synthesis of strontium titanate powder, comprising a first-end heating chamber assembly 1, an intermediate heating chamber assembly 6, a last-end heating chamber assembly 7, a metering feed assembly 5, and a connecting pipe assembly 2. The output end of the metering feed assembly 5 is connected to the initial input pipe of the first-end heating chamber assembly 1 via a feed pipeline 4. The invention is characterized in that at least one intermediate heating chamber assembly 6 is disposed between the first-end heating chamber assembly 1 and the last-end heating chamber assembly 7. The heating temperature within the first-end heating chamber assembly 1 and the heating temperature within the intermediate heating chamber assembly 6 are specified. The heating temperature in the end heating box assembly 7 increases sequentially. The first end heating box assembly 1 and the uppermost intermediate heating box assembly 6 are connected by a connecting pipe assembly 2. Adjacent intermediate heating box assemblies are connected by a connecting pipe assembly 2. The lowermost intermediate heating box assembly and the end heating box assembly are connected by a connecting pipe assembly 2. The connecting pipe assembly 2 can quantitatively convey the heated material. The end heating box assembly 7 is also equipped with a discharge pipe assembly 8. Furthermore, the first end heating box assembly, intermediate heating box assembly, and end heating box assembly are all connected to a protective atmosphere supply pipeline.

[0034] In this embodiment, the first heating box assembly 1, the middle heating box assembly 6, and the last heating box assembly 7 have the same structure and are stacked vertically. Each of the first heating box assembly, the middle heating box assembly, and the last heating box assembly includes a heating buffer chamber 10 and a temperature holding chamber 11. The heating buffer chamber 10 and the temperature holding chamber 11 are arranged vertically at intervals. The heating buffer chamber 10 and the adjacent temperature holding chamber 11 below it are also connected by a connecting pipe assembly 2. The temperature in the heating buffer chamber is designed to heat up at a uniform rate and cool down quickly. The temperature in the temperature holding chamber is equal to the temperature of the heating buffer chamber above it after heating. The heating rate of the uniform heating is no more than 10°C per minute.

[0035] In a preferred embodiment, each of the heating buffer chamber 10 and the temperature holding chamber 11 is provided with a heating assembly 29 on its peripheral wall. Each heating assembly 29 includes a plurality of heating units 21 arranged in a row. Each heating unit 21 of each heating assembly is individually controlled by a unit controller. Each unit controller is controlled by a master controller. Each heating unit is provided with a temperature sensor, and the temperature sensor is connected to the unit controller for feedback control.

[0036] Each heating unit includes a heat-conducting actuator plate 16, a heating block 18, and a heat insulation plate 20. The heat-conducting actuator plate 16 is disposed facing the heating buffer chamber and the temperature holding chamber. The heating block 18 is fitted and abutted against the end of the heat-conducting actuator plate 16 away from the heating buffer chamber and the temperature holding chamber. The heat insulation plate 20 is fixedly disposed on the side of the heating block 18 away from the heat-conducting actuator plate. An electric heating component is disposed inside the heating block 18. The temperature sensor is arranged inside the heat-conducting actuator plate and / or the heating block.

[0037] In this invention, the electric heating assembly includes multiple main heating rods 19 and multiple auxiliary heating rods 17. The heating block 18 has multiple perforations spaced along its length, and each perforation houses a main heating rod 19. The heating block has multiple secondary holes along its thickness, and each secondary hole houses a secondary heating rod 17. The number of secondary heating rods is at least five times the number of main heating rods. The thickness direction is from the heating block toward the insulation plate. Each main heating rod and each secondary heating rod on each heating block is connected to a unit controller.

[0038] In a preferred embodiment, the connecting pipe assembly includes a U-shaped connecting pipe 24, a first switching valve 22, a second switching valve 26, and a first protective gas connector 23. The upper end of the U-shaped connecting pipe 24 is connected to the output end of the heating buffer chamber or the output end of the temperature holding chamber, and the lower end of the U-shaped connecting pipe 24 is connected to the input end of the heating buffer chamber or the input end of the temperature holding chamber. The first switching valve 22 is provided at the upper end of the U-shaped connecting pipe, and the second switching valve 26 is provided at the lower end of the U-shaped connecting pipe. The first protective gas connector 23, which is arranged on the U-shaped connecting pipe, is provided between the first switching valve and the second switching valve.

[0039] The connecting pipe assembly further includes a second protective gas connector 14, which is connected to the U-shaped connecting pipe and arranged between the first switching valve and the second switching valve. The second protective gas connector is arranged near the second switching valve, and the first protective gas connector is arranged near the first switching valve.

[0040] In this invention, a spare connector 25 is also provided on the U-shaped connecting pipe between the first protective gas connector and the second protective gas connector. The spare connector 25 is provided with an on / off valve 15. The spare connector, the first protective gas connector and the second protective gas connector are arranged in parallel on the U-shaped connecting pipe.

[0041] In a preferred embodiment, the housings of the first heating box assembly, the middle heating box assembly, and the last heating box assembly are provided with a feed hole 28 and a discharge hole 31. The feed hole and the discharge hole are connected to the cavity 30 of the heating buffer heating chamber or the temperature holding chamber. The heating buffer heating chamber and the temperature holding chamber are both conical structures with a larger upper end and a smaller lower end. The feed hole extends horizontally, and the discharge hole extends downward at an angle.

[0042] Furthermore, the present invention also provides a reaction method for a continuous high-temperature reaction apparatus for the synthesis of strontium titanate powder, characterized in that: it employs the continuous high-temperature reaction apparatus for the synthesis of strontium titanate powder described in the present invention, and includes the following steps:

[0043] (1) Filling with protective gas: Evacuate the heating buffer heating chamber and temperature holding chamber of the first heating box assembly 1, the middle heating box assembly 6 and the end heating box assembly 7, and fill with protective gas, which is nitrogen or inert gas.

[0044] (2) Feeding: Connect the output end of the quantitative feeding component 5 to the initial input pipe of the first heating box component through the feeding pipeline, and add a quantitative amount of material into the heating buffer heating chamber of the first heating box component using the quantitative feeding component 5;

[0045] (3) Start heating: Start the heating components of the first heating box assembly, the middle heating box assembly, and the end heating box assembly to heat them to their respective target temperatures;

[0046] (4) Gradual heating: After the temperature in the heating buffer heating chamber of the first heating box assembly reaches the target temperature, the target temperature in the heating buffer heating chamber is equal to the holding temperature in the adjacent temperature holding chamber below it. Open the first switch valve and the second switch valve so that the material in the heating buffer heating chamber of the first heating box assembly automatically flows into the temperature holding chamber of the first heating box assembly. At the same time, the opening and closing of the first switch valve 22 and the second switch valve 26 and the first protective gas connector 23 and the second protective gas connector are used to press the remaining material in the connecting pipe assembly into the temperature holding chamber of the first heating box assembly.

[0047] (5) Heating and material discharge: The temperature in the heating buffer heating chamber is reduced to the holding temperature in the adjacent temperature holding chamber above it. Steps (2)-(4) are repeated so that the material is discharged after passing through the heating buffer heating chamber of each intermediate heating box assembly, the temperature holding chamber of the intermediate heating box assembly, the heating buffer heating chamber of the end heating box assembly, and the temperature holding chamber of the end heating box assembly.

[0048] This invention discloses a continuous high-temperature reaction apparatus for the synthesis of strontium titanate powder. It effectively improves the purity and performance of the synthesized strontium titanate powder, while achieving precise control of multiple temperature zones. This allows for gradual temperature increase and holding during synthesis, and separates the heating and holding processes for simultaneous operation. It also enables continuous feeding and quantitative delivery of raw materials, effectively ensuring continuous synthesis capabilities. Furthermore, the invention is equipped with an atmosphere protection system to effectively control oxygen partial pressure, significantly improving product purity. The temperature control accuracy is effectively guaranteed. The heating assembly includes multiple arranged heating units, each individually controlled by a unit controller, which in turn is controlled by a central controller. Each heating unit is equipped with a temperature sensor, which is connected to the unit controller for feedback control, improving control accuracy and reliability. Additionally, the heating block contains… The device is equipped with multiple main heating rods and multiple auxiliary heating rods, with the number of auxiliary heating rods being at least five times the number of main heating rods. The thickness direction is from the heating block towards the insulation plate. Each main heating rod and each auxiliary heating rod on each heating block is connected to a unit controller, which can improve the uniformity and stability of heating and achieve precise control of the heating temperature. By setting up a connecting pipe assembly, the invention allows the material to pass through the heating buffer heating chamber of the first heating box assembly, the temperature holding chamber of the first heating box assembly, the heating buffer heating chamber of the middle heating box assembly, the temperature holding chamber of the middle heating box assembly, the heating buffer heating chamber of the end heating box assembly, and the temperature holding chamber of the end heating box assembly before being discharged. This achieves multi-segment temperature control, effectively realizes continuous feeding and quantitative conveying, and improves the synthesis and preparation capacity.

[0049] The above description shows and illustrates the basic principles, main features, and advantages of the present invention. Standard parts used in the present invention can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts, and equipment adopt conventional models in the prior art, and the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here.

[0050] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A continuous high-temperature reaction apparatus for the synthesis of strontium titanate powder, comprising a first-end heating chamber assembly (1), an intermediate heating chamber assembly (6), a last-end heating chamber assembly (7), a quantitative feeding assembly (5), and a connecting pipe assembly (2), wherein the output end of the quantitative feeding assembly (5) is connected to the initial input pipe (3) of the first-end heating chamber assembly (1) via a feed pipeline (4), characterized in that, At least one intermediate heating box assembly (6) is provided between the first heating box assembly (1) and the last heating box assembly (7). The heating temperature in the first heating box assembly (1), the heating temperature in the intermediate heating box assembly (6), and the heating temperature in the last heating box assembly (7) increase sequentially. The first heating box assembly (1) and the uppermost intermediate heating box assembly (6) are connected by a connecting pipe assembly (2). Adjacent intermediate heating box assemblies are connected by a connecting pipe assembly (2). The lowermost intermediate heating box assembly and the last heating box assembly are connected by a connecting pipe assembly (2). The connecting pipe assembly (2) can quantitatively convey the heated material. The last heating box assembly (7) is also provided with a discharge pipe assembly (8). Furthermore, the first heating box assembly, the intermediate heating box assembly, and the last heating box assembly are all connected with protective atmosphere supply pipelines (9).

2. The continuous high-temperature reaction equipment for the synthesis of strontium titanate powder according to claim 1, characterized in that: The first heating box assembly (1), the middle heating box assembly (6), and the last heating box assembly (7) have the same structure and are stacked on top of each other. The first heating box assembly, the middle heating box assembly, and the last heating box assembly all include a heating buffer chamber (10) and a temperature holding chamber (11). The heating buffer chamber (10) and the temperature holding chamber (11) are arranged vertically at intervals. The heating buffer chamber (10) and the temperature holding chamber (11) below it are also connected by a connecting pipe assembly (2). The temperature in the heating buffer chamber is set to be able to heat up at a uniform rate and cool down quickly. The temperature in the temperature holding chamber is equal to the temperature of the heating buffer chamber above it after heating. The heating rate of the uniform heating is no more than 10°C per minute.

3. The continuous high-temperature reaction equipment for the synthesis of strontium titanate powder according to claim 2, characterized in that: Each of the heating buffer heating chambers (10) and temperature holding chambers (11) is provided with a heating assembly (29) on its peripheral wall. Each heating assembly (29) includes a plurality of heating units (21) arranged in a row. Each heating unit (21) of each heating assembly is individually controlled by a unit controller. Each unit controller is controlled by a master controller. Each heating unit is provided with a temperature sensor, and the temperature sensor is connected to the unit controller for feedback control.

4. The continuous high-temperature reaction equipment for the synthesis of strontium titanate powder according to claim 3, characterized in that: Each of the heating units includes a heat-conducting actuator plate (16), a heating block (18), and a heat insulation plate (20). The heat-conducting actuator plate (16) is disposed facing the heating buffer chamber and the temperature holding chamber. The heating block (18) is fitted and abutted at one end of the heat-conducting actuator plate (16) away from the heating buffer chamber and the temperature holding chamber. The heat insulation plate (20) is fixedly disposed on the side of the heating block (18) away from the heat-conducting actuator plate. An electric heating component is disposed inside the heating block (18). The temperature sensor is arranged inside the heat-conducting actuator plate and / or the heating block.

5. The continuous high-temperature reaction equipment for the synthesis of strontium titanate powder according to claim 1, characterized in that: The electric heating assembly includes multiple main heating rods (19) and multiple auxiliary heating rods (17). The heating block (18) has multiple arrangement holes (13) spaced apart along its length direction. Each arrangement hole contains a main heating rod (19). The heating block has multiple auxiliary holes (12) arranged along its thickness direction. Each auxiliary hole contains an auxiliary heating rod (17). The number of auxiliary heating rods is at least five times the number of main heating rods. The thickness direction is from the heating block toward the insulation plate. Each main heating rod and each auxiliary heating rod on each heating block is connected to the unit controller.

6. The continuous high-temperature reaction equipment for the synthesis of strontium titanate powder according to claim 1, characterized in that: The connecting pipe assembly includes a U-shaped connecting pipe (24), a first switching valve (22), a second switching valve (26), and a first protective gas connector (23). The upper end of the U-shaped connecting pipe (24) is connected to the output end of the heating buffer chamber or the output end of the temperature holding chamber, and the lower end of the U-shaped connecting pipe (24) is connected to the input end of the heating buffer chamber or the input end of the temperature holding chamber. The first switching valve (22) is provided at the upper end of the U-shaped connecting pipe, and the second switching valve (26) is provided at the lower end of the U-shaped connecting pipe. The first protective gas connector (23) arranged on the U-shaped connecting pipe is provided between the first switching valve and the second switching valve.

7. The continuous high-temperature reaction equipment for the synthesis of strontium titanate powder according to claim 1, characterized in that: The connecting pipe assembly also includes a second protective gas connector (14), which is connected to the U-shaped connecting pipe and is arranged between the first switching valve and the second switching valve. The second protective gas connector is arranged near the second switching valve, and the first protective gas connector is arranged near the first switching valve.

8. The continuous high-temperature reaction equipment for the synthesis of strontium titanate powder according to claim 1, characterized in that: A spare connector (25) is also provided on the U-shaped connecting pipe between the first protective gas connector and the second protective gas connector. An on / off valve (15) is provided on the spare connector (25). The spare connector, the first protective gas connector and the second protective gas connector are arranged in parallel on the U-shaped connecting pipe.

9. The continuous high-temperature reaction equipment for the synthesis of strontium titanate powder according to claim 1, characterized in that: The first heating box assembly, the middle heating box assembly, and the last heating box assembly are provided with a feed hole (28) and a discharge hole (31) on their boxes. The feed hole and the discharge hole are connected to the cavity (30) of the heating buffer heating cavity or the temperature holding cavity. The heating buffer heating cavity and the temperature holding cavity are both conical structures with a larger upper end and a smaller lower end. The feed hole is arranged horizontally, and the discharge hole is arranged inclined downward.

10. A reaction method for a continuous high-temperature reaction apparatus for the synthesis of strontium titanate powder, characterized in that: It employs a continuous high-temperature reaction apparatus for the synthesis of strontium titanate powder as described in any one of claims 1-9, comprising the following steps: (1) Filling with protective gas: Evacuate the heating buffer heating chamber and temperature holding chamber of the first heating box assembly (1), the middle heating box assembly (6), and the end heating box assembly (7), and fill with protective gas, which is nitrogen or inert gas. (2) Feeding: Connect the output end of the quantitative feeding component (5) to the initial input pipe of the first heating box component through the feeding pipeline, and add a quantitative amount of material into the heating buffer heating chamber of the first heating box component using the quantitative feeding component (5); (3) Start heating: Start the heating components of the first heating box assembly, the middle heating box assembly, and the end heating box assembly to heat them to their respective target temperatures; (4) Gradual heating: After the temperature in the heating buffer heating chamber of the first heating box assembly reaches the target temperature, the target temperature in the heating buffer heating chamber is equal to the holding temperature in the adjacent temperature holding chamber below it. Open the first switch valve and the second switch valve so that the material in the heating buffer heating chamber of the first heating box assembly automatically flows into the temperature holding chamber of the first heating box assembly. At the same time, the opening and closing of the first switch valve (22) and the second switch valve (26) and the first protective gas connector (23) and the second protective gas connector are used to press the remaining material in the connecting pipe assembly into the temperature holding chamber of the first heating box assembly. (5) Heating and material discharge: The temperature in the heating buffer heating chamber is reduced to the holding temperature in the adjacent temperature holding chamber above it. Steps (2)-(4) are repeated so that the material is discharged after passing through the heating buffer heating chamber of each intermediate heating box assembly, the temperature holding chamber of the intermediate heating box assembly, the heating buffer heating chamber of the end heating box assembly, and the temperature holding chamber of the end heating box assembly.

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