Silicon nitride whisker combined silicon carbide porous ceramic and production method thereof
A technology of silicon nitride whiskers and porous ceramics, applied in the field of porous ceramics, can solve the problems of being unsuitable for large-scale production, endangering the health of operators, and causing great harm to people and the environment, achieving low production costs, improving overall performance, and reducing pollution small effect
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[0037] Example 1
[0038] A silicon nitride whisker combined with silicon carbide porous ceramics and a preparation method thereof. The steps of the preparation method are:
[0039] Step 1. According to the mass ratio of foam stabilizer: deionized water (0.001~0.005):1, add the foam stabilizer to the deionized water, and magnetically stir for 12-24 hours to prepare a foam stabilizer solution.
[0040] Step 2. According to the mass ratio of catalyst: isobutylene-maleic anhydride copolymer: ceramic powder: the deionized water is (0.001~0.04): (0.01~0.015): (2.34~3.10):1, the catalyst, Isobutylene-maleic anhydride copolymer and ceramic powder are added to the foam stabilizer solution, and mechanically stirred for 5-15 minutes to prepare silicon nitride / silicon carbide ceramic slurry.
[0041] Step 3. Add the foaming agent to the silicon nitride / silicon carbide ceramic slurry according to the volume ratio of the foaming agent: the silicon nitride / silicon carbide ceramic slurry as (0.005~...
Example Embodiment
[0045] Example 2
[0046] A silicon nitride whisker combined with silicon carbide porous ceramics and a preparation method thereof. The steps of the preparation method are:
[0047] Step 1. According to the mass ratio of foam stabilizer: deionized water (0.001~0.005):1, add the foam stabilizer to the deionized water, and magnetically stir for 12-24 hours to prepare a foam stabilizer solution.
[0048] Step 2: According to the mass ratio of catalyst: isobutylene-maleic anhydride copolymer: ceramic powder: the deionized water is (0.04~0.08): (0.004~0.01): (2.26~2.99):1, the catalyst, Isobutylene-maleic anhydride copolymer and ceramic powder are added to the foam stabilizer solution, and mechanically stirred for 5-15 minutes to prepare silicon nitride / silicon carbide ceramic slurry.
[0049] Step 3. Add the foaming agent to the silicon nitride / silicon carbide ceramic slurry according to the volume ratio of the foaming agent: the silicon nitride / silicon carbide ceramic slurry as (0.005~0...
Example Embodiment
[0053] Example 3
[0054] A silicon nitride whisker combined with silicon carbide porous ceramics and a preparation method thereof. The steps of the preparation method are:
[0055] Step 1. According to the mass ratio of foam stabilizer: deionized water (0.005~0.01):1, add the foam stabilizer to the deionized water, and magnetically stir for 12-24 hours to prepare a foam stabilizer solution.
[0056] Step 2. According to the mass ratio of catalyst: isobutylene-maleic anhydride copolymer: ceramic powder: the deionized water is (0.001~0.04): (0.004~0.01): (2.19~2.89):1, the catalyst, Isobutylene-maleic anhydride copolymer and ceramic powder are added to the foam stabilizer solution, and mechanically stirred for 5-15 minutes to prepare silicon nitride / silicon carbide ceramic slurry.
[0057] Step 3. Add the foaming agent to the silicon nitride / silicon carbide ceramic slurry according to the volume ratio of the foaming agent: the silicon nitride / silicon carbide ceramic slurry as (0.01~0....
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