Method for producing a refractory material and refractory material

Abstract

The application discloses a preparation method of refractory material and the refractory material, and relates to the technical field of refractory material. The application solves the technical problems of the existing technology, such as the complex process for obtaining the refractory material suitable for titanium-zirconium and its alloy precision casting, high cost, and difficulty in cleaning the ceramic core when titanium-zirconium and its alloy is cast in some narrow gaps, runners, cavities, air passages and other spaces. The preparation method of the refractory material comprises the following steps: uniformly mixing calcium carbonate and yttrium trioxide into a mixture according to a molar ratio of 1:2-4; drying the mixture to form a powder; wet ball milling the powder, and then constant-temperature drying to form a powder, wherein the powder drying time is greater than or equal to 48 hours; adding 5% of polyvinyl alcohol binder by weight into the powder to granulate and sieve to form a green material, and then drying the green material after being pressed to form a green body; and high-temperature sintering the green body. The refractory material has excellent stability, high refractoriness and strength, and the kerosene has a self-collapse characteristic.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of refractory materials, and particularly relates to a preparation method of a refractory material and the refractory material. BACKGROUND

[0002] Refractory materials are important basic materials for high-temperature industries and are widely used in the fields of steel, non-ferrous metals, glass, ceramics, and chemical industry. With the continuous development of high-temperature industries, the requirements for refractory materials are becoming higher and higher.

[0003] The existing refractory material suitable for titanium-zirconium and its alloy precision casting is high-purity yttria and high-purity zirconia after stabilization treatment. However, the high-purity yttria and high-purity zirconia have a complex and difficult acquisition process and a high cost. In addition, when titanium-zirconium and its alloy are cast in some narrow gaps, runners, cavities, and air passages, yttria or zirconia ceramic cores are usually used. However, it is difficult to clean the yttria or zirconia ceramic cores, and even the castings may be scrapped, thereby increasing the cost and wasting resources. SUMMARY

[0004] The embodiments of the present application provide a preparation method of a refractory material and the refractory material, and solve the technical problems of a complex acquisition process and a high cost of the existing refractory material suitable for titanium-zirconium and its alloy precision casting and the difficulty in cleaning ceramic cores when titanium-zirconium and its alloy are cast in some narrow gaps, runners, cavities, and air passages.

[0005] In a first aspect, the embodiments of the present application provide a preparation method of a refractory material, comprising:

[0006] The calcium carbonate and diyttrium trioxide are mixed in a molar ratio of 1:2-4 to form a mixture; the mixture is dried to form a powder; the powder is wet ball milled, and then constant-temperature dried to form a powder, and the powder is dried for more than or equal to 48 hours; 5% of polyvinyl alcohol binder by weight is added to the powder to form granules, and the granules are sieved to form a green material, and the green material is dried after being pressed to form a green body; and the green body is high-temperature sintered.

[0007] In combination with the first aspect, in a possible implementation manner, the green body is high-temperature sintered, including: heating the green body to a temperature of 1350 DEG C, and keeping the temperature of 1350 DEG C for 2 hours; heating the green body from the temperature of 1350 DEG C to a temperature of 1450 DEG C, and keeping the temperature of 1450 DEG C for 3 hours; and cooling to 0 DEG C with the furnace after power-off.

[0008] In combination with the first aspect, in a possible implementation manner, the calcium carbonate and diyttrium trioxide are mixed in a molar ratio of 1:2 to form a mixture.

[0009] In combination with the first aspect, in a possible implementation manner, the drying temperature of the mixture is 80-120 DEG C.

[0010] With reference to the first aspect, in a possible implementation manner, the powder is wet ball milled by adding deionized water.

[0011] With reference to the first aspect, in a possible implementation manner, the powder drying temperature is 80-125 DEG C.

[0012] With reference to the first aspect, in a possible implementation manner, the green compact is formed by pressing at a pressure of 50 MPa, and is demolded after pressure maintaining for 45 s and dried for more than 24 hours.

[0013] The second aspect, the application provides a kind of refractory material prepared using the preparation method of refractory material described in the first aspect or any one of the possible implementation manners of the first aspect, refractory material is applied to the ceramic core of titanium, zirconium metal vacuum casting.

[0014] The one or more technical solutions provided in the embodiments of the application have at least the following technical effects:

[0015] The preparation method of the refractory material provided in the embodiments of the application includes uniformly mixing calcium carbonate and yttrium trioxide in a molar ratio of 1:2-4 to form a mixture; drying the mixture to form a powder; wet ball milling the powder, and constant temperature drying after wet ball milling to form a powder, and the powder is dried for more than 48 hours; adding 5% by weight of polyvinyl alcohol binder into the powder to granulate and sieve to form a green compact, and the green compact is dried after pressing to form a green body; and high temperature sintering the green body. The refractory material prepared by the preparation method of the refractory material has excellent stability, the refractory material of the embodiments of the application has high refractoriness and strength, and has self-collapse characteristics. The refractory material of the application can be better applied to the ceramic core of titanium, zirconium metal vacuum casting, which is beneficial to improve production efficiency and casting quality, the preparation method is simple and easy to industrial production. At the same time, the refractory material has low impurity content, obvious economic benefit and easy operation. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the application, the following will briefly introduce the drawings needed to be used in the description of the embodiments of the application. Obviously, the drawings in the following description are some embodiments of the application, and other drawings can also be obtained by those skilled in the art without creating laborious work.

[0017] Figure 1 The flow chart of the preparation method of the refractory material provided in the embodiments of the application is shown in the figure.

[0018] Figure 2 The process diagram of high temperature sintering the green body provided in the embodiments of the application is shown in the figure.

[0019] Figure 3The sample blocks prepared in Example 1 to Example 6 provided for the embodiments of the present application;

[0020] Figure 4a The hydration test graphs of the sample blocks prepared in Example 1 to Example 4 provided for the embodiments of the present application;

[0021] Figure 4b The hydration test graphs of the sample blocks prepared in Example 5 and Example 6 provided for the embodiments of the present application;

[0022] Figure 5a and Figure 5b The test graphs of the sample blocks prepared in Example 5 provided for the embodiments of the present application soaked in kerosene;

[0023] Figure 6 The SEM graphs of the micro-morphology of the sample prepared by casting the refractory material prepared in Example 5 provided for the embodiments of the present application after casting titanium at different magnifications;

[0024] Figure 7a , Figure 7b and Figure 7c The SEM graphs of the point scanning element analysis of the interface between the sample prepared by casting the refractory material prepared in Example 5 provided for the embodiments of the present application after casting titanium and the titanium matrix at different regions;

[0025] Figure 8a , Figure 8b and Figure 8c The SEM graphs of the surface scanning element distribution of the interface between the sample prepared by casting the refractory material prepared in Example 5 provided for the embodiments of the present application after casting titanium and the titanium matrix at different positions;

[0026] Figure 9 The SEM graphs of the micro-morphology of the interface between the sample prepared by casting the refractory material prepared in Example 6 provided for the embodiments of the present application after casting titanium and the titanium matrix at different magnifications;

[0027] Figure 10a and Figure 10b The SEM graphs of the point scanning element analysis of the interface between the sample prepared by casting the refractory material prepared in Example 6 provided for the embodiments of the present application after casting titanium and the titanium matrix at different regions;

[0028] Figure 11a and Figure 11b The SEM graphs of the surface scanning element distribution of the interface between the sample prepared by casting the refractory material prepared in Example 6 provided for the embodiments of the present application after casting titanium and the titanium matrix at different positions;

[0029] Figure 12a and Figure 12b The linear distribution SEM graphs of the interface between the sample prepared by casting the refractory material prepared in Example 5 provided for the embodiments of the present application after casting titanium and the titanium matrix. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of the present application.

[0031] In the description of the embodiments of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. The terms "first", "second", "third" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance. In addition, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication between two elements inside. For those of ordinary skill in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0032] The embodiments of the present application provide a preparation method of a refractory material, as shown in the formula, the method comprises S101 to S105: Figure 1

[0033] S101: uniformly mixing calcium carbonate and yttrium trioxide according to a molar ratio of 1:2-4 to form a mixture;

[0034] S102: drying the mixture to form a powder;

[0035] S103: wet ball milling the powder, and constant temperature drying after wet ball milling to form a powder, and the powder drying is ≥48 hours;

[0036] S104: adding 5% by weight of polyvinyl alcohol binder into the powder to granulate, sieve to form a green material, and drying after pressing the green material to form a green body;

[0037] S105: high temperature sintering the green body.

[0038] It should be noted that the purity of calcium carbonate in the embodiments of the present application needs to be more than 99%. Calcium carbonate reacts to generate carbon dioxide, which is more beneficial to the reaction. Of course, calcium carbonate in the embodiments of the present application can be replaced by calcium oxide, and the molar ratio is the same as that of calcium carbonate.​

[0039] In the embodiment of the present application, the embryo is sintered at high temperature, comprising:

[0040] The embryo is heated to 1350 DEG C, and kept at 1350 DEG C for 2 hours;

[0041] The embryo is heated from 1350 DEG C to 1450 DEG C, and kept at 1450 DEG C for 3 hours;

[0042] Power off and cool to 0 DEG C.

[0043] In the embodiment of the present application, calcium carbonate and yttrium trioxide are mixed in a molar ratio of 1:2 to form a mixture. The impurity content of the heat-resistant material prepared according to the molar ratio of 1:2 of calcium carbonate and yttrium trioxide is low, and the prepared sample has a smooth morphology.

[0044] In the embodiment of the present application, the drying temperature of the mixture is 80-120 DEG C. It should be noted that the drying temperature of the mixture is usually 100 DEG C.

[0045] In the embodiment of the present application, deionized water is added when the powder is wet ball milled. The deionized water is pure water after removing ionic impurities, so that the purity of the refractory material is high.

[0046] In the embodiment of the present application, the drying temperature of the powder is 80-125 DEG C. The general drying temperature of the powder is 100 DEG C.

[0047] In the embodiment of the present application, the pressure for pressing the embryo into shape is 50 Mpa, and the pressure is kept for 45 S before demolding and drying for ≥24 hours. It should be noted that the drying time of the embodiment of the present application is 24 hours.

[0048] In the embodiment of the present application, the refractory material prepared by the preparation method of the refractory material is applied to the ceramic core of titanium and zirconium metal vacuum casting.

[0049] Further, the refractory material of the embodiment of the present application can also be applied to the shell material, and the refractory material has high-temperature oxidation resistance and high-temperature creep resistance.

[0050] It should be noted that the refractory material prepared by the preparation method of the refractory material has excellent stability, high refractoriness and strength, and has self-collapse characteristics. Therefore, the refractory material of the present application can be better applied to the ceramic core of titanium and zirconium metal vacuum casting, which is beneficial to improve the production efficiency and casting quality, and the preparation method is simple and easy to industrial production. In addition, the refractory material has low impurity content, obvious economic benefit, easy operation, and extremely weak reaction with titanium, zirconium and their alloy metals at high temperature.

[0051] The technical solutions of the embodiments of the present application will be described in detail below with specific examples.

[0052] Embodiment one:

[0053] (1) 84.6 g of calcium carbonate and 152.62 g of yttrium trioxide are mixed and stirred uniformly to form a mixture;

[0054] (2) The mixture is dried at 100°C to form a powder;

[0055] (3) Deionized water is added to the powder and wet ball milling is performed, and then constant temperature drying is performed to form a powder, wherein the powder drying temperature is 100°C, and the powder drying time is 48 hours;

[0056] (4) 5% by weight of polyvinyl alcohol binder is added to the powder to perform granulation and sieving to form a green material, and the green material is dried after being pressed to form a green body, wherein the pressure for forming the green material is 50 MPa, the pressure is maintained for 45 seconds before demolding, and the green material is dried for 24 hours;

[0057] (5) The green body is heated to 1350°C, and maintained at 1350°C for 2 hours; the green body is heated from 1350°C to 1450°C, and maintained at 1450°C for 3 hours; and the power is turned off and the furnace is cooled to 0°C to obtain the refractory material.

[0058] Embodiment two:

[0059] (1) 56.1 g of calcium carbonate and 168.6 g of yttrium trioxide are mixed and stirred uniformly to form a mixture;

[0060] (2) The mixture is dried at 100°C to form a powder;

[0061] (3) Deionized water is added to the powder and wet ball milling is performed, and then constant temperature drying is performed to form a powder, wherein the powder drying temperature is 100°C, and the powder drying time is 48 hours;

[0062] (4) 5% by weight of polyvinyl alcohol binder is added to the powder to perform granulation and sieving to form a green material, and the green material is dried after being pressed to form a green body, wherein the pressure for forming the green material is 50 MPa, the pressure is maintained for 45 seconds before demolding, and the green material is dried for 24 hours;

[0063] (5) The green body is heated to 1350°C, and maintained at 1350°C for 2 hours; the green body is heated from 1350°C to 1450°C, and maintained at 1450°C for 3 hours; and the power is turned off and the furnace is cooled to 0°C to obtain the refractory material.

[0064] Embodiment three:

[0065] (1) 71.1 g of calcium carbonate and 160.2 g of yttrium trioxide are mixed and stirred uniformly to form a mixture;

[0066] (2) The mixture is dried at 100°C to form a powder;

[0067] (3) Deionized water is added to the powder and wet ball milling is performed, and after wet ball milling, constant temperature drying is performed to form a powder, the powder drying temperature is 100°C, and the powder drying time is 48 hours;

[0068] (4) 5% by weight of polyvinyl alcohol binder is added to the powder to form granules, and the granules are sieved to form a green material, the green material is dried after being pressed to form a green body, wherein the pressure for forming the green material is 50 MPa, the pressure is maintained for 45 seconds before demolding, and the green body is dried for 24 hours;

[0069] (5) The green body is heated to 1350°C and held at 1350°C for 2 hours; the green body is heated from 1350°C to 1450°C and held at 1450°C for 3 hours; the power is turned off and the furnace is cooled to 0°C to obtain the refractory material.

[0070] Example Four:

[0071] (1) 97g of calcium carbonate and 145.7g of yttrium trioxide are mixed and stirred uniformly to form a mixture;

[0072] (2) The mixture is dried at 100°C to form a powder;

[0073] (3) Deionized water is added to the powder and wet ball milling is performed, and after wet ball milling, constant temperature drying is performed to form a powder, the powder drying temperature is 100°C, and the powder drying time is 48 hours;

[0074] (4) 5% by weight of polyvinyl alcohol binder is added to the powder to form granules, and the granules are sieved to form a green material, the green material is dried after being pressed to form a green body, wherein the pressure for forming the green material is 50 MPa, the pressure is maintained for 45 seconds before demolding, and the green body is dried for 24 hours;

[0075] (5) The green body is heated to 1350°C and held at 1350°C for 2 hours; the green body is heated from 1350°C to 1450°C and held at 1450°C for 3 hours; the power is turned off and the furnace is cooled to 0°C to obtain the refractory material.

[0076] Example Five:

[0077] (1) 20.9g of calcium carbonate and 188.3g of yttrium trioxide are mixed and stirred uniformly to form a mixture;

[0078] (2) The mixture is dried at 100°C to form a powder;

[0079] (3) adding deionized water into the powder and wet ball milling, constant temperature drying after wet ball milling to form powder, the powder drying temperature is 100℃, the powder drying is 48 hours;

[0080] (4) adding 5% polyvinyl alcohol binder by weight into the powder to granulate, sieving to form green material, drying after green material pressing to form green body, wherein the pressure of green material forming is 50MPa, demolding after 45 seconds of pressure maintaining, and drying for 24 hours;

[0081] (5) heating the green body to 1350℃, and maintaining at 1350℃ for 2 hours; heating the green body from 1350℃ to 1450℃, and maintaining at 1450℃ for 3 hours; power off and cooling to 0℃ in the furnace to obtain the refractory material.

[0082] Example Six:

[0083] (1) mixing 39.5g calcium carbonate and 177.9g yttrium trioxide, and stirring uniformly to form a mixture;

[0084] (2) drying the mixture at 100℃ to form a powder;

[0085] (3) adding deionized water into the powder and wet ball milling, constant temperature drying after wet ball milling to form powder, the powder drying temperature is 100℃, the powder drying is 48 hours;

[0086] (4) adding 5% polyvinyl alcohol binder by weight into the powder to granulate, sieving to form green material, drying after green material pressing to form green body, wherein the pressure of green material forming is 50MPa, demolding after 45 seconds of pressure maintaining, and drying for 24 hours;

[0087] (5) heating the green body to 1350℃, and maintaining at 1350℃ for 2 hours; heating the green body from 1350℃ to 1450℃, and maintaining at 1450℃ for 3 hours; power off and cooling to 0℃ in the furnace to obtain the refractory material.

[0088] As shown in Table 1, the sample blocks of the refractory materials prepared in Examples One to Six have clear edges and corners. The sample blocks prepared in Examples One to Four have darker appearance, and the sample blocks prepared in Examples Five and Six have brighter appearance. Figure 3 The sample blocks prepared in Examples One to Six are respectively placed in water for 72 hours. As can be seen from Table 2, the sample blocks prepared in Examples One to Four dissolve to different degrees after being placed in water; as can be seen from Table 3, the sample blocks prepared in Examples Five and Six do not dissolve.

[0089] Figure 4a Figure 4b

[0090] ​​​Table 1 is a comparison of the weight before and after immersion of the samples prepared in Example 1, Example 2, Example 3, Example 4, Example 5 and Example 6.

[0091] Table 1 - Comparison of the weight of the samples before and after immersion

[0092]

[0093] Therefore, it can be seen that the samples prepared in Example 5 and Example 6 have excellent hydration resistance and can be used as refractory materials.

[0094] Figure 5a Figure 2 is a test diagram of the sample prepared in Example 5 just after being immersed in kerosene, Figure 5b Figure 3 is a test diagram of the sample prepared in Example 5 after 72 hours of kerosene invasion.

[0095] In the prior art, when titanium-zirconium and its alloys are cast into certain narrow gaps, flow channels, cavities, air passages and the like, yttrium oxide or zirconium oxide ceramic cores are usually used, but it is difficult to clean the cores by mechanical or chemical corrosion methods, and even the castings may be scrapped, thereby increasing the cost and wasting resources. Figure 5a and Figure 5b It can be seen that the sample prepared in Example 5 can self-collapse in kerosene, which can be better applied to ceramic cores, thereby making it easy to clean the cores of the castings and being conducive to improving the production efficiency and the quality of the castings, and being easy to industrialize production.

[0096] Figure 6 Figure 4 is an SEM diagram of the microstructure of the sample prepared in Example 5 of the embodiments provided by the present application after casting titanium at different magnifications. From Figure 6 It can be seen that the microstructure of the surface layer of the sample is porous, the local morphology is uniform, and the shape is smooth.

[0097] Figure 7a , Figure 7b and Figure 7c Figure 5 is an SEM diagram of the point scanning element analysis of the interface between the sample prepared in Example 5 of the embodiments provided by the present application after casting titanium and the titanium matrix in different regions. From Figure 7a , Figure 7b and Figure 7c It can be seen that the surface contamination layer of the sample is very thin, and the matrix Ti element can be detected. Among them, Figure 7a and 7c The surface contamination layer at the positions of and is very thin, and there is no Si element, Figure 7b The proportion of the Si element at the position of is also very small. Therefore, it can be concluded that the Si element of the sample prepared in Example 5 of the embodiments provided by the present application after casting titanium is almost nonexistent, and from Figure 7a , Figure 7b andFigure 7c As can be seen, the refractory material prepared in Example 5, after being cast into titanium, did not react with Ti and did not penetrate into the Ti matrix. Therefore, the embodiments of this application are applicable to refractory materials of titanium, zirconium, and their alloy metals.

[0098] Figure 8a , Figure 8b and Figure 8c The image shows the surface scan elemental distribution (SEM) images at different locations of the interface between the refractory material prepared in Example 5 of this application and the titanium matrix after casting. Figure 8a , Figure 8b and Figure 8c As can be seen, Ca and Y elements are evenly distributed.

[0099] Figure 9 SEM images of the interface between the refractory material prepared in Example 6 of this application and the titanium matrix, taken at different magnifications, showing the microstructure of the interface. Figure 9 It can be seen that the microstructure of the sample surface exhibits a porous distribution, with a porosity lower than that of the sample surface. Figure 6 The sample showed uniform local morphology, but the overall coating thickness was uneven and there was some peeling.

[0100] Figure 10a and Figure 10b This document presents SEM images of the interface between the refractory material prepared in Example 6 of this application, after casting titanium, and the titanium matrix in different regions, showing elemental analysis. Figure 10a and Figure 10b It can be seen that the contamination layer on the sample surface is very thin, and the matrix Ti element can be detected. However, the thickness of the contamination layer on the sample surface is greater than the thickness of the contamination layer on the sample surface obtained after casting titanium into the refractory material prepared in Example 5. Among these, Figure 10a No Si element at this location. Figure 10b The proportion of Si element at the location is very small. Therefore, it can be concluded that the sample obtained after casting titanium into the refractory material prepared in Example Six of this application contains almost no Si element, and its Ca element content is lower than that of the sample obtained after casting titanium into the refractory material prepared in Example Five. Meanwhile, from... Figure 10a and Figure 10b As can be seen, the refractory material prepared in Example 6, after being cast into titanium, did not react with Ti and did not penetrate into the titanium matrix. Therefore, the embodiments of this application are applicable to refractory materials made of titanium, zirconium, and their alloy metals.

[0101] Figure 11a and Figure 11b The image shows the surface scan elemental distribution (SEM) images at different locations of the interface between the refractory material prepared in Example 6 of this application and the titanium matrix after casting. Figure 11a andFigure 11b It can be seen that the Ca element and the Y element are uniformly distributed.

[0102] Therefore, it can be known that the refractory materials prepared in the fifth and sixth embodiments of the present application are both suitable for the ceramic cores of titanium and zirconium metal vacuum casting. Relatively speaking, the refractory material prepared in the fifth embodiment is better, which has low impurity content, obvious economic benefits, easy operation, and no reaction with titanium, zirconium and their alloy metals at high temperature.

[0103] Figure 12a and Figure 12b The linear distribution SEM diagram of the sample obtained after the refractory material prepared in the fifth embodiment of the present application is cast with titanium and the interface with the titanium matrix is provided. From the diagram, it can be seen that the Ca element and the Y element are uniformly distributed, and there is no other element. Figure 12a and Figure 12b It can be seen that the Ca element and the Y element are uniformly distributed, and there is no other element. It is illustrated that the refractory material of the present application does not penetrate into the titanium matrix and does not react with it.

[0104] Each embodiment in the specification is described in a progressive manner, and the same or similar parts between each embodiment can be referred to each other, and each embodiment mainly illustrates the difference from other embodiments.

[0105] The above embodiments are only used to illustrate the technical solutions of the present application, and are not limited to the present application; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the present application.

Claims

1. A method for the production of a refractory material, characterized in that, The application relates to a refractory material for ceramic core of titanium and zirconium vacuum casting. Mixing calcium carbonate and yttrium trioxide in a molar ratio of 1:2 to form a mixture; Drying the mixture to form powder; the drying temperature of the mixture is 80-120 DEG C; Wet ball milling the powder, adding deionized water when the powder is wet ball milled; constant temperature drying after the wet ball milling to form powder, the drying temperature of the powder is 80-125 DEG C; the powder drying time is greater than or equal to 48 hours; Adding 5% polyvinyl alcohol binder to the powder to granulate, sieve to form green material, and drying the green material after being pressed to form a green body; the pressure of the green material during the pressing is 50Mpa, the pressure is kept for 45S, then the green material is demolded and dried for more than or equal to 24 hours; High-temperature sintering the green body; the high-temperature sintering of the green body comprises the following steps: heating the green body to 1350 DEG C, and keeping the temperature for 2 hours at 1350 DEG C; Heating the green body from 1350 DEG C to 1450 DEG C, and keeping the temperature for 3 hours at 1450 DEG C; Power-off cooling to 0 DEG C.

2. A refractory material prepared using the method of preparing a refractory material according to claim 1, characterized by, The refractory material is applied to the ceramic core of titanium and zirconium vacuum casting.

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