Ceramic composition, preparation method and application of ceramic composition, and ceramic substrate
A technology of ceramic composition and ceramic substrate, applied in the field of ceramics, can solve problems such as poor mechanical properties of aluminum nitride ceramics
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[0048] The preparation method of the ceramic composition of an embodiment, comprises the steps:
[0049] S110: Pre-mix the aluminum source and carbon source according to the molar ratio of aluminum and carbon elements of 1:1.5 to 1:3, and then add the precursor of the auxiliary agent to continue mixing and drying to obtain a mixture, wherein the precursor of the auxiliary agent is mixed with The mass ratio of the aluminum source is 0.001:1-0.005:1.
[0050] Since the amount of the precursor of the auxiliary agent is relatively small, after mixing the aluminum source and the carbon source, and then mixing with the precursor of the auxiliary agent, it is beneficial for the precursor of the auxiliary agent, the aluminum source and the carbon source to be processed faster and more efficiently. Mix well. Of course, it should be noted that the precursor of the auxiliary agent, the aluminum source and the carbon source can also be mixed together, as long as the three can be mixed un...
Embodiment 1
[0081] (1) Pre-mix the aluminum source and carbon source at a molar ratio of aluminum to carbon of 1:1.5, then add the precursor of the auxiliary agent and continue mixing, heat and dry at 90°C for 5 hours to obtain a mixture. Among them, the pre-mixing method and the mixing method are both wet ball milling, the aluminum source is α-alumina, the carbon source is graphite powder, the precursor of the auxiliary agent is strontium carbonate, and the quality of the precursor of the auxiliary agent and the aluminum source The ratio is 0.001:1.
[0082] (2) Place the dried mixture in a graphite crucible, put it into a nitriding furnace, feed 5 L / min of nitrogen gas, and react at 1450° C. for 15 hours to obtain an intermediate.
[0083] (3) Put the intermediate body into a rotary furnace, react at 600°C for 10 hours to obtain a ceramic composition, and vacuum pack the ceramic composition.
[0084] (4) Mix 100g of ceramic composition, 3.5g of yttrium oxide, 0.5g of polyethylene glyco...
Embodiment 2
[0086] (1) Pre-mix the aluminum source and carbon source at a molar ratio of aluminum to carbon of 1:1.5, then add the precursor of the auxiliary agent and continue mixing, heat and dry at 90°C for 5 hours to obtain a mixture. Among them, the pre-mixing method and the mixing method are both wet ball milling, the aluminum source is γ-alumina, the carbon source is sucrose, the precursor of the auxiliary agent is calcium carbonate, and the mass ratio of the precursor of the auxiliary agent to the aluminum source is It is 0.003:1.
[0087] (2) Place the dried mixture in a graphite crucible, put it into a nitriding furnace, feed 30 L / min of nitrogen gas, and react at 1500° C. for 10 hours to obtain an intermediate.
[0088] (3) Put the intermediate into a rotary furnace, react at 670°C for 7 hours to obtain a ceramic composition, and vacuum pack the ceramic composition.
[0089](4) Mix 100g of ceramic composition, 4.5g of yttrium oxide, 0.5g of polyethylene glycol, 1g of polyvinyl...
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