A ceramic composite material and a preparation method thereof

Abstract

The present invention relates to the technical field of ceramic materials, and specifically relates to a ceramic composite material and a preparation method thereof. The ceramic composite material comprises the following raw materials in parts by weight: 30-35 parts of silicon carbide, 15-20 parts of boron nitride, 10-15 parts of silicon dioxide, 8-11 parts of an additive based on a modified filler, and 7-10 parts of a ball milling agent based on a compound adjustment and modification of sodium alginate. The ceramic composite material of the present invention is prepared by mixing and coordinating silicon carbide, boron nitride, silicon dioxide, an additive based on a modified filler, and a ball milling agent based on a compound adjustment and modification of sodium alginate. Through the synergistic effect of the raw materials, the obtained product can achieve coordinated improvement in strength, wear resistance, and thermal conductivity, and has remarkable heat resistance and corrosion resistance stability effects.

Description

Technical Field

[0001] The present invention relates to the technical field of ceramic materials, and particularly relates to a ceramic composite material and a preparation method thereof. Background Art

[0002] Ceramic composite materials are a type of composite materials that are composed of a ceramic matrix and various fibers. The ceramic matrix can be high-temperature structural ceramics such as silicon nitride and silicon carbide. Ceramic matrix composites are widely used in liquid rocket engine nozzles, missile radomes, space shuttle nose cones, aircraft brake discs, high-end automotive brake discs, etc., and have become an important branch of high-tech new materials.

[0003] In order to improve the strength performance of existing ceramic materials, it is easy to cause poor wear resistance and thermal conductivity of the materials. It is difficult for products to achieve coordinated improvement of strength, wear resistance and thermal conductivity, and the heat resistance and corrosion resistance stability of products are poor, which further limits the use efficiency of products. Summary of the Invention

[0004] Aiming at the defects of the prior art, the purpose of the present invention is to provide a ceramic composite material and a preparation method thereof to solve the problems raised in the above background art.

[0005] The present invention solves the technical problems by adopting the following technical solutions:

[0006] The present invention provides a ceramic composite material, and the ceramic composite material comprises the following raw materials in parts by weight:

[0007] 30-35 parts of silicon carbide, 15-20 parts of boron nitride, 10-15 parts of silicon dioxide, 8-11 parts of an additive based on a modified filler, and 7-10 parts of a ball milling agent based on sodium alginate complex adjustment and modification.

[0008] Preferably, the ceramic composite material comprises the following raw materials in parts by weight:

[0009] 32.5 parts of silicon carbide, 17.5 parts of boron nitride, 12.5 parts of silicon dioxide, 9 parts of an additive based on a modified filler, and 8.5 parts of a ball milling agent based on sodium alginate complex adjustment and modification.

[0010] Preferably, the preparation method of the additive based on a modified filler is as follows:

[0011] S01: Stir cordierite sufficiently in a sufficient amount of 10% potassium permanganate solution by mass fraction, then wash with water, filter by suction, and preheat at 55-60 °C for 1 h to obtain a preheated cordierite body;

[0012] S02: Mix double-walled carbon nanotubes and cerium oxide in a weight ratio of 5:2, then sinter at 170-180 °C for 1 h, and finally cool to room temperature to obtain a sintered body;

[0013] Mix 3 - 5 parts by weight of the sintered body, 1 - 3 parts by weight of the silane coupling agent KH550, 5 - 8 parts by weight of the sodium citrate solution, and 2 - 4 parts of aluminosilicate fiber thoroughly to obtain a modified liquid;

[0014] S03: Stir - process the pre - heated cordierite body and the modified liquid in a weight ratio of 3:5. After stirring, a modified liquid doped with cordierite is obtained;

[0015] S04: Mix and ball - mill the modified liquid doped with cordierite and the additive in a weight ratio of 5:3. The ball - milling speed is 1500 r / min, and ball - mill for 1 h. After ball - milling, filter by suction and dry to obtain an additive based on the modified filler.

[0016] The additive based on the modified filler uses cordierite as the matrix, and is improved by potassium permanganate solution in combination with pre - heating to optimize its activity efficiency, making it easier to be improved and optimized by the modified liquid. In the modified liquid, the sintered body is combined with the silane coupling agent KH550, the sodium citrate solution, and aluminosilicate fiber. Through the coordination of raw materials, the needle - like structure of aluminosilicate fiber is combined with the sintered body raw materials. The double - wall carbon nanotubes and cerium oxide in the sintered body are improved through compounding and re - sintering. Through the coordination of raw materials, the coordination and enhancement effect between the cordierite body and the modification are optimized, thereby improving the performance coordination and performance stability of the system. At the same time, the additive uses rectorite as the matrix, and is jointly mixed and improved with dopamine hydrochloride solution, lanthanum oxide, zirconium silicate, and nano - titanium dioxide. Through the coordination of raw materials, the improvement effect of the additive on the modified liquid doped with cordierite is enhanced, and further improvement of the product performance is achieved.

[0017] Preferably, the mass fraction of the sodium citrate solution is 4 - 7%; the diameter of the double - wall carbon nanotubes is 2 - 4 nm, the length is 1 μm, and the specific surface area is 375 - 385 m 2 / g.

[0018] Preferably, the stirring speed of the stirring treatment is 750 - 800 r / min, and the stirring time is 35 - 45 min.

[0019] Preferably, the preparation method of the additive is:

[0020] Add 5 - 8 parts by weight of rectorite to 10 - 15 parts by weight of dopamine hydrochloride solution, then add 2 - 5 parts by weight of lanthanum oxide, 4 - 7 parts by weight of zirconium silicate, and 2 - 3 parts by weight of nano - titanium dioxide, stir thoroughly, and then filter by suction and dry to obtain the additive.

[0021] Preferably, the mass fraction of the dopamine hydrochloride solution is 2 - 5%.

[0022] Preferably, the preparation method of the ball - milling agent based on sodium alginate complex modulation is:

[0023] S11: Stir sodium alginate and 5% hydrogen peroxide solution evenly at a weight ratio of 2:5, then wash with water, filter by suction, and dry.

[0024] Mix the dried sodium alginate powder, chitosan solution, and sodium silicate solution evenly at a weight ratio of 3:5:1 to obtain a sodium alginate compounding solution.

[0025] S12: Add 2 - 4 parts by weight of magnesium oxide, 3 - 5 parts by weight of aluminum oxide, and 1 - 3 parts by weight of hydroxyapatite to 5 - 8 parts by weight of the sodium alginate compounding solution and stir well to obtain a ball milling agent modified based on sodium alginate compounding.

[0026] The ball milling agent modified based on sodium alginate compounding is improved by sodium alginate through oxidation, then coordinated with chitosan solution and sodium silicate solution, and at the same time, magnesium oxide, aluminum oxide, and hydroxyapatite are jointly used for improvement. Through the co - matching and coordination of raw materials, the co - matching effect between the ball milling agent modified based on sodium alginate compounding and the additive based on modified filler is further enhanced, thereby further improving the performance of the product.

[0027] Preferably, the mass fraction of the chitosan solution is 2 - 5%; the mass fraction of the sodium silicate solution is 5 - 8%.

[0028] The present invention also provides a preparation method of a ceramic composite material, including the following steps: co - blend and ball - mill silicon carbide, boron nitride, silicon dioxide, an additive based on modified filler, and a ball milling agent modified based on sodium alginate compounding. The ball - milling speed is 1500 r / min, ball - mill for 1 h. After the ball - milling is completed, mold in a mold, the molding pressure is 80 MPa, and finally sinter at 1150 °C for 1 h. After the sintering is completed, a ceramic composite material is obtained.

[0029] Compared with the prior art, the present invention has the following beneficial effects:

[0030] The ceramic composite material of the present invention is coordinated by silicon carbide, boron nitride, silicon dioxide, an additive based on modified filler, and a ball milling agent modified based on sodium alginate compounding. Through the co - matching and synergistic effect of raw materials, the obtained product can achieve coordinated improvement in strength, wear resistance, and thermal conductivity, and the product has remarkable heat - resistance, corrosion - resistance, and stability effects. Detailed implementation manners

[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with specific embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0032] A ceramic composite material in this embodiment, the ceramic composite material includes the following raw materials in parts by weight:

[0033] 30-35 parts of silicon carbide, 15-20 parts of boron nitride, 10-15 parts of silicon dioxide, 8-11 parts of an additive based on a modified filler, and 7-10 parts of a ball milling agent based on sodium alginate complex modulation modification.

[0034] The ceramic composite material in this embodiment includes the following raw materials in parts by weight:

[0035] 32.5 parts of silicon carbide, 17.5 parts of boron nitride, 12.5 parts of silicon dioxide, 9 parts of an additive based on a modified filler, and 8.5 parts of a ball milling agent based on sodium alginate complex modulation modification.

[0036] The preparation method of the additive based on a modified filler in this embodiment is as follows:

[0037] S01: Stir cordierite sufficiently in a sufficient amount of 10% potassium permanganate solution by mass fraction, then wash with water, filter by suction, and preheat at 55-60 °C for 1 h to obtain a preheated cordierite body;

[0038] S02: Mix double-walled carbon nanotubes and cerium oxide in a weight ratio of 5:2, then sinter at 170-180 °C for 1 h, and finally cool to room temperature to obtain a sintered body;

[0039] Mix 3-5 parts by weight of the sintered body, 1-3 parts by weight of the silane coupling agent KH550, 5-8 parts by weight of the sodium citrate solution, and 2-4 parts of aluminosilicate fiber sufficiently to obtain a modified liquid;

[0040] S03: Stir the preheated cordierite body and the modified liquid in a weight ratio of 3:5, and after stirring, obtain a modified liquid doped with cordierite;

[0041] S04: Mix and ball mill the modified liquid doped with cordierite and the additive in a weight ratio of 5:3, with a ball milling speed of 1500 r / min and ball milling for 1 h. After ball milling, filter by suction and dry to obtain an additive based on a modified filler.

[0042] The mass fraction of the sodium citrate solution in this embodiment is 4-7%; the diameter of the double-walled carbon nanotubes is 2-4 nm, the length is 1 um, and the specific surface area is 375-385 m 2 / g.

[0043] The stirring speed of the stirring treatment in this embodiment is 750 - 800 r / min, and the stirring lasts for 35 - 45 min.

[0044] The preparation method of the additive in this embodiment is as follows:

[0045] Add 5 - 8 parts by weight of rectorite to 10 - 15 parts by weight of hydrochloric acid dopamine solution, then add 2 - 5 parts by weight of lanthanum oxide, 4 - 7 parts by weight of zirconium silicate, and 2 - 3 parts by weight of nano - titanium dioxide, stir well, then filter by suction and dry to obtain the additive.

[0046] The mass fraction of the hydrochloric acid dopamine solution in this embodiment is 2 - 5%.

[0047] The preparation method of the ball - milling agent based on sodium alginate complex - modulation modification in this embodiment is as follows:

[0048] S11: Stir sodium alginate and 5% hydrogen peroxide solution evenly according to a weight ratio of 2:5, then wash with water, filter by suction and dry;

[0049] Mix the dried sodium alginate powder, chitosan solution and sodium silicate solution evenly according to a weight ratio of 3:5:1 to obtain the sodium alginate complex - modulation liquid;

[0050] S12: Add 2 - 4 parts by weight of magnesium oxide, 3 - 5 parts by weight of alumina and 1 - 3 parts by weight of hydroxyapatite to 5 - 8 parts by weight of the sodium alginate complex - modulation liquid and stir well to obtain the ball - milling agent based on sodium alginate complex - modulation modification.

[0051] The mass fraction of the chitosan solution in this embodiment is 2 - 5%; the mass fraction of the sodium silicate solution is 5 - 8%.

[0052] The preparation method of a ceramic composite material in this embodiment includes the following steps: Mix silicon carbide, boron nitride, silicon dioxide, the additive based on modified filler and the ball - milling agent based on sodium alginate complex - modulation modification and perform ball - milling treatment. The ball - milling speed is 1500 r / min, and the ball - milling lasts for 1 h. After the ball - milling is completed, mold in a mold, the molding pressure is 80 MPa, and finally sinter at 1150 °C for 1 h. After the sintering is completed, obtain the ceramic composite material.

[0053] Example 1

[0054] A ceramic composite material in this embodiment, the ceramic composite material includes the following raw materials in parts by weight:

[0055] 30 parts of silicon carbide, 15 parts of boron nitride, 10 parts of silicon dioxide, 8 parts of the additive based on modified filler, 7 parts of the ball - milling agent based on sodium alginate complex - modulation modification.

[0056] The preparation method of the additive based on the modified filler in this embodiment is as follows:

[0057] S01: Stir the cordierite sufficiently in a sufficient amount of 10% potassium permanganate solution by mass fraction, then wash with water, filter by suction, and preheat at 55 °C for 1 h to obtain a preheated cordierite body;

[0058] S02: Mix multi-walled carbon nanotubes and cerium oxide in a weight ratio of 5:2, then sinter at 170 °C for 1 h, and finally cool to room temperature to obtain a sintered body;

[0059] Mix 3 parts by weight of the sintered body, 1 part by weight of silane coupling agent KH550, 5 parts by weight of sodium citrate solution, and 2 parts of aluminum silicate fiber to obtain a modified liquid;

[0060] S03: Stir the preheated cordierite body and the modified liquid in a weight ratio of 3:5, and after stirring, obtain a modified liquid doped with cordierite;

[0061] S04: Mix the modified liquid doped with cordierite and the additive in a weight ratio of 5:3, perform ball milling treatment at a ball milling speed of 1500 r / min for 1 h, and after ball milling, filter by suction and dry to obtain the additive based on the modified filler.

[0062] In this embodiment, the mass fraction of the sodium citrate solution is 4%; the diameter of the multi-walled carbon nanotubes is 2 nm, the length is 1 μm, and the specific surface area is 375 m 2 / g.

[0063] In this embodiment, the stirring speed of the stirring treatment is 750 r / min, and the stirring time is 35 min.

[0064] The preparation method of the additive in this embodiment is as follows:

[0065] Add 5 parts by weight of rectorite to 10 parts by weight of hydrochloric acid dopamine solution, then add 2 parts by weight of lanthanum oxide, 4 parts by weight of zirconium silicate, and 2 parts by weight of nano-titanium dioxide, stir sufficiently, and then filter by suction and dry to obtain the additive.

[0066] In this embodiment, the mass fraction of the hydrochloric acid dopamine solution is 2%.

[0067] The preparation method of the ball milling agent based on sodium alginate complex modulation modification in this embodiment is as follows:

[0068] S11: Stir sodium alginate and 5% hydrogen peroxide solution by mass fraction evenly in a weight ratio of 2:5, then wash with water, filter by suction, and dry;

[0069] Mix the dried sodium alginate powder, chitosan solution, and sodium silicate solution evenly in a weight ratio of 3:5:1 to obtain a sodium alginate complex modulation liquid;

[0070] S12: adding 2 parts by weight of magnesium oxide, 3 parts by weight of aluminum oxide and 1 part by weight of hydroxyapatite to 5 parts by weight of sodium alginate remixing solution and stirring thoroughly to obtain a ball mill modified based on sodium alginate remixing solution.

[0071] The mass fraction of the chitosan solution in this embodiment is 2%; the mass fraction of the sodium silicate solution is 5%.

[0072] A preparation method of a ceramic composite material in this embodiment includes the following steps: mixing silicon carbide, boron nitride, silicon dioxide, an additive based on a modified filler and a ball mill based on a sodium alginate polymodified modified ball mill, the ball milling speed is 1500r / min, the ball milling is for 1h, after the ball milling is completed, molding in a mold, the molding pressure is 80MPa, and finally sintering at 1150°C for 1h, after the sintering is completed, to obtain a ceramic composite material.

[0073] Example 2

[0074] A ceramic composite material of this embodiment includes the following raw materials in parts by weight:

[0075] 35 parts of silicon carbide, 20 parts of boron nitride, 15 parts of silicon dioxide, 11 parts of additives based on modified fillers, and 10 parts of ball mills based on sodium alginate polymodification modification.

[0076] The preparation method of the additive based on the modified filler of this embodiment is:

[0077] S01: stir cordierite in a sufficient amount of 10% by mass potassium permanganate solution, then wash with water, filter, and preheat at 60°C for 1h to obtain a preheated cordierite body;

[0078] S02: mixing double-walled carbon nanotubes and cerium oxide in a weight ratio of 5:2, sintering at 180° C. for 1 h, and finally cooling to room temperature to obtain a sintered body;

[0079] 5 parts by weight of the sintered body, 3 parts by weight of the silane coupling agent KH550, 8 parts by weight of the sodium citrate solution and 4 parts of the aluminum silicate fiber are fully blended to obtain a modified solution;

[0080] S03: stirring the preheated cordierite body and the modified liquid in a weight ratio of 3:5, and completing the stirring to obtain a modified liquid doped with cordierite;

[0081] S04: The modified solution doped with cordierite and the additive are mixed in a weight ratio of 5:3 and ball-milled at a speed of 1500 r / min for 1 h. After the ball milling is completed, the mixture is filtered and dried to obtain an additive based on a modified filler.

[0082] In this embodiment, the mass fraction of the sodium citrate solution is 7%; the diameter of the double-walled carbon nanotubes is 4 nm, the length is 1 μm, and the specific surface area is 385 m 2 / g.

[0083] In this embodiment, the stirring speed of the stirring treatment is 800 r / min, and the stirring is carried out for 45 min.

[0084] The preparation method of the additive in this embodiment is as follows:

[0085] Add 8 parts by weight of rectorite to 15 parts by weight of hydrochloric acid dopamine solution, then add 5 parts by weight of lanthanum oxide, 7 parts by weight of zirconium silicate and 3 parts by weight of nano-titanium dioxide, stir well, then filter and dry to obtain the additive.

[0086] In this embodiment, the mass fraction of the hydrochloric acid dopamine solution is 5%.

[0087] The preparation method of the ball milling agent based on sodium alginate complex modification in this embodiment is as follows:

[0088] S11: Stir sodium alginate and a 5% mass fraction hydrogen peroxide solution evenly according to a weight ratio of 2:5, then wash with water, filter and dry;

[0089] Mix the dried sodium alginate powder, chitosan solution and sodium silicate solution evenly according to a weight ratio of 3:5:1 to obtain a sodium alginate complex solution;

[0090] S12: Add 4 parts by weight of magnesium oxide, 5 parts by weight of aluminum oxide and 3 parts by weight of hydroxyapatite to 8 parts by weight of the sodium alginate complex solution and stir well to obtain a ball milling agent based on sodium alginate complex modification.

[0091] In this embodiment, the mass fraction of the chitosan solution is 5%; the mass fraction of the sodium silicate solution is 8%.

[0092] The preparation method of a ceramic composite material in this embodiment includes the following steps: co-mix and ball mill silicon carbide, boron nitride, silicon dioxide, an additive based on a modified filler and a ball milling agent based on sodium alginate complex modification, the ball milling speed is 1500 r / min, the ball milling is carried out for 1 h, after the ball milling is finished, it is molded in a mold, the molding pressure is 80 MPa, and finally it is sintered at 1150 °C for 1 h. After the sintering is finished, a ceramic composite material is obtained.

[0093] Example 3

[0094] A ceramic composite material in this embodiment, the ceramic composite material includes the following raw materials in parts by weight:

[0095] 32.5 parts of silicon carbide, 17.5 parts of boron nitride, 12.5 parts of silicon dioxide, 9 parts of an additive based on a modified filler, and 8.5 parts of a ball milling agent based on sodium alginate compound modulation modification.

[0096] The preparation method of the additive based on the modified filler in this embodiment is as follows:

[0097] S01: Stir cordierite sufficiently in a sufficient amount of 10% potassium permanganate solution by mass fraction, then wash with water, filter by suction, and preheat at 57.5 °C for 1 h to obtain a preheated cordierite body;

[0098] S02: Mix double-walled carbon nanotubes and cerium oxide in a weight ratio of 5:2, then sinter at 175 °C for 1 h, and finally cool to room temperature to obtain a sintered body;

[0099] Mix 4 parts by weight of the sintered body, 2 parts by weight of the silane coupling agent KH550, 6 parts by weight of the sodium citrate solution, and 3 parts of aluminum silicate fiber sufficiently to obtain a modified liquid;

[0100] S03: Stir and process the preheated cordierite body and the modified liquid in a weight ratio of 3:5. After stirring, obtain a modified liquid doped with cordierite;

[0101] S04: Mix and ball mill the modified liquid doped with cordierite and the additive in a weight ratio of 5:3. The ball milling speed is 1500 r / min, and ball mill for 1 h. After ball milling, filter by suction and dry to obtain an additive based on a modified filler.

[0102] The mass fraction of the sodium citrate solution in this embodiment is 5.5%; the diameter of the double-walled carbon nanotubes is 3 nm, the length is 1 um, and the specific surface area is 380 m 2 / g.

[0103] The stirring speed of the stirring process in this embodiment is 770 r / min, and stir for 40 min.

[0104] The preparation method of the additive in this embodiment is as follows:

[0105] Add 6.5 parts by weight of rectorite to 12.5 parts by weight of the hydrochloric acid dopamine solution, then add 3.5 parts by weight of lanthanum oxide, 5.5 parts by weight of zirconium silicate, and 2.5 parts by weight of nano-titanium dioxide, stir sufficiently, and then filter by suction and dry to obtain an additive.

[0106] The mass fraction of the hydrochloric acid dopamine solution in this embodiment is 3.5%.

[0107] The preparation method of the ball milling agent based on sodium alginate compound modulation modification in this embodiment is as follows:

[0108] S11: mixing sodium alginate and 5% by mass hydrogen peroxide solution in a weight ratio of 2:5, then washing, filtering and drying;

[0109] The dried sodium alginate powder, chitosan solution and sodium silicate solution are mixed in a weight ratio of 3:5:1 to obtain a sodium alginate compound solution;

[0110] S12: adding 3 parts by weight of magnesium oxide, 4 parts by weight of aluminum oxide and 2 parts by weight of hydroxyapatite to 6.5 parts by weight of sodium alginate remixing solution and stirring thoroughly to obtain a ball mill based on sodium alginate remixing modification.

[0111] The mass fraction of the chitosan solution in this embodiment is 3.5%; the mass fraction of the sodium silicate solution is 6.5%.

[0112] A preparation method of a ceramic composite material in this embodiment includes the following steps: mixing silicon carbide, boron nitride, silicon dioxide, an additive based on a modified filler and a ball mill based on a sodium alginate polymodified modified ball mill, the ball milling speed is 1500r / min, the ball milling is for 1h, after the ball milling is completed, molding in a mold, the molding pressure is 80MPa, and finally sintering at 1150°C for 1h, after the sintering is completed, to obtain a ceramic composite material.

[0113] Comparative Example 1

[0114] The difference from Example 3 is that no additive based on modified filler is added.

[0115] Comparative Example 2

[0116] The difference from Example 3 is that no cordierite-doped modifying liquid is added in the preparation of the additive based on the modified filler.

[0117] Comparative Example 3

[0118] The difference from Example 3 is that no preheated cordierite body is added in the preparation of the cordierite-doped modifying liquid.

[0119] Comparative Example 4

[0120] The difference from Example 3 is that no modifying liquid treatment is added in the preparation of the modifying liquid doped with cordierite.

[0121] Comparative Example 5

[0122] The difference from Example 3 is that no sintered body is added to the modified liquid.

[0123] Comparative Example 6

[0124] The difference from Example 3 is that aluminum silicate fiber and silane coupling agent KH550 are not added to the modified liquid.

[0125] Comparative Example 7

[0126] It is different from Example 3 in that no additive is added during the preparation of the additive based on the modified filler.

[0127] Comparative Example 8

[0128] It is different from Example 3 in that the ball milling agent based on the complex modulation and modification of sodium alginate is not added.

[0129] Comparative Example 9

[0130] It is different from Example 3 in that dry sodium alginate powder and sodium silicate solution are not added during the preparation of the ball milling agent based on the complex modulation and modification of sodium alginate.

[0131] Comparative Example 10

[0132] It is different from Example 3 in that alumina and hydroxyapatite are not added during the preparation of the ball milling agent based on the complex modulation and modification of sodium alginate.

[0133] The products of Examples 1 to 3 and Comparative Examples 1 to 10 were routinely subjected to performance tests. At the same time, the products were placed at 110 °C for 24 h, then placed in a 5% hydrochloric acid solution for 24 h and in a 2% sodium hydroxide solution for 24 h. The above is one cycle, and the cycle was repeated 10 times to test the heat resistance and corrosion resistance stability of the products. The test results are shown in Table 1 below. Table 1 is the performance test table of the product strength, wear resistance and thermal conductivity;

[0134] Table 1:

[0135]

[0136] It can be seen from Comparative Examples 1 to 10 and Examples 1 to 3 that;

[0137] The product of Example 3 has excellent flexural strength, thermal conductivity and wear resistance. The strength, thermal conductivity and wear resistance of the product can be coordinately improved, and the heat resistance and corrosion resistance stability of the product are remarkable;

[0138] If one of the additive based on the modified filler and the ball milling agent based on the complex modulation and modification of sodium alginate is not added to the product, the performance of the product deteriorates significantly. By using the two in coordination and synergistic effect, the performance effect of the product is the most remarkable;

[0139] If the modified liquid doped with cordierite is not added during the preparation of the additive based on the modified filler, the preheated cordierite body is not added during the preparation of the modified liquid doped with cordierite, the modified liquid treatment is not carried out during the preparation of the modified liquid doped with cordierite, the sintered body is not added to the modified liquid, the aluminosilicate fiber and silane coupling agent KH550 are not added to the modified liquid, and no additive is added during the preparation of the additive based on the modified filler, the performance of the product shows a trend of varying degrees of deterioration;

[0140] The modified liquid obtained by the specific method of the present invention and the preheated cordierite body to obtain the modified liquid doped with cordierite, and the additive based on the modified filler prepared by the additive of the present invention, have the most significant performance effect. At the same time, the inventors of the present invention also found that when the additive is not added in the preparation of the additive based on the modified filler, the performance of the product also shows a more obvious trend of deterioration;

[0141] In the preparation of the ball mill based on sodium alginate multiple modification, no dry sodium alginate powder and sodium silicate solution, no alumina and hydroxyapatite are added, and the performance of the product has a tendency to deteriorate to varying degrees. The ball mill based on sodium alginate multiple modification obtained by the method of the present invention has the most significant product performance effect.

[0142] Since additives can significantly change the performance of products, further research is needed:

[0143] The preparation method of the additive is:

[0144] 6.5 parts by weight of rectorite are added to 12.5 parts by weight of dopamine hydrochloride solution, followed by adding 3.5 parts by weight of lanthanum oxide, 5.5 parts by weight of zirconium silicate and 2.5 parts by weight of nano titanium dioxide, stirring thoroughly, filtering and drying to obtain an additive.

[0145] Experimental Example 1

[0146] The only difference from Example 3 is that no lanthanum oxide is added to the additive.

[0147] Experimental Example 2

[0148] The only difference from Example 3 is that no nano titanium dioxide is added to the additive.

[0149] Experimental Example 3

[0150] The only difference from Example 3 is that zirconium silicate is not added to the additive.

[0151] Experimental Example 4

[0152] The only difference from Example 3 is that the dopamine hydrochloride solution is replaced by water.

[0153] Experimental Example 5

[0154] The only difference from Example 3 is that no rectorite is added in the additive.

[0155] The test results of the effect of additives on the performance of the product are shown in Table 2 below. Table 2 is a test table of the effect of additives on the performance of the product;

[0156] Table 2:

[0157]

[0158] As can be seen from Experimental Examples 1-5, when rectorite is not added to the additive, the performance change trend of the product is relatively large. At the same time, when zirconium silicate or nano-titanium dioxide is not added to the additive, the performance of the product shows a deteriorating trend. In addition, when lanthanum oxide is not added to the additive and water is used instead of hydrochloric acid dopamine solution, the performance of the product also shows a deteriorating trend to varying degrees. The performance effect of the product is the most significant when the additive is obtained by combining rectorite and zirconium silicate with specific raw materials. Only the performance effect of the product prepared with the specific raw materials of the present invention is the most significant, and the effects of using other methods to replace are not as obvious as that of the present invention.

[0159] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention.

[0160] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A ceramic composite material, characterized in that: The ceramic composite material comprises the following raw materials in parts by weight: 30-35 parts of silicon carbide, 15-20 parts of boron nitride, 10-15 parts of silicon dioxide, 8-11 parts of additives based on modified fillers, and 7-10 parts of ball mills based on sodium alginate polymodification; The preparation method of the ball mill based on sodium alginate polymodification modification is as follows: S11: mixing sodium alginate and 5% by mass hydrogen peroxide solution in a weight ratio of 2:5, then washing, filtering and drying; The dried sodium alginate powder, chitosan solution and sodium silicate solution are mixed in a weight ratio of 3:5:1 to obtain a sodium alginate compound solution; S12: adding 2 to 4 parts by weight of magnesium oxide, 3 to 5 parts by weight of aluminum oxide and 1 to 3 parts by weight of hydroxyapatite to 5 to 8 parts by weight of sodium alginate remixing solution and stirring sufficiently to obtain a ball mill based on sodium alginate remixing modification; The preparation method of the additive based on the modified filler is: S01: stir cordierite in a sufficient amount of 10% by mass potassium permanganate solution, then wash with water, filter, and preheat at 55-60°C for 1h to obtain a preheated cordierite body; S02: mixing double-walled carbon nanotubes and cerium oxide in a weight ratio of 5:2, sintering at 170-180° C. for 1 h, and finally cooling to room temperature to obtain a sintered body; 3-5 parts by weight of the sintered body, 1-3 parts by weight of the silane coupling agent KH550, 5-8 parts by weight of the sodium citrate solution and 2-4 parts of the aluminum silicate fiber are fully blended to obtain a modified solution; S03: stirring the preheated cordierite body and the modified liquid in a weight ratio of 3:5, and completing the stirring to obtain a modified liquid doped with cordierite; S04: The modified solution doped with cordierite and the additive are mixed in a weight ratio of 5:3 and ball-milled at a ball-milling speed of 1500 r / min for 1 h. After the ball-milling is completed, the mixture is filtered and dried to obtain an additive based on a modified filler; The preparation method of the additive is: 5-8 parts by weight of rectorite are added to 10-15 parts by weight of dopamine hydrochloride solution, followed by adding 2-5 parts by weight of lanthanum oxide, 4-7 parts by weight of zirconium silicate and 2-3 parts by weight of nano titanium dioxide, stirring sufficiently, then filtering and drying to obtain an additive.

2. A ceramic composite material according to claim 1, characterized in that: The ceramic composite material comprises the following raw materials in parts by weight: 32.5 parts of silicon carbide, 17.5 parts of boron nitride, 12.5 parts of silicon dioxide, 9 parts of additives based on modified fillers, and 8.5 parts of ball mills based on sodium alginate polymodification modification.

3. A ceramic composite material according to claim 1, characterized in that: The mass fraction of sodium citrate solution is 4~7%; the diameter of double-walled carbon nanotubes is 2~4nm, the length is 1µm, and the specific surface area is 375~385m / g.

4. A ceramic composite material according to claim 1, characterized in that: The stirring speed of the stirring treatment is 750~800r / min, and the stirring time is 35~45min.

5. A ceramic composite material according to claim 1, characterized in that: The mass fraction of dopamine hydrochloride solution is 2~5%.

6. A ceramic composite material according to claim 1, characterized in that: The mass fraction of the chitosan solution is 2~5%; the mass fraction of the sodium silicate solution is 5~8%.

7. A method for preparing the ceramic composite material according to any one of claims 1 to 6, characterized in that: The method comprises the following steps: mixing silicon carbide, boron nitride, silicon dioxide, an additive based on a modified filler and a ball mill based on a sodium alginate polymodified modification, ball milling at a ball milling speed of 1500 r / min for 1 hour, forming in a mold at a molding pressure of 80 MPa, and finally sintering at 1150° C. for 1 hour to obtain a ceramic composite material.

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