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Silicon nitride ceramic and preparation method thereof
The invention discloses silicon nitride ceramic and a preparation method thereof, and relates to the technical field of ceramic preparation. The ceramic is prepared from the following raw materials: modified aluminum oxide, magnesium fluoride, silicon nitride powder, a sintering aid and a toughening agent, the sintering aid is yttrium oxide; the flexibilizer is silicon carbide; the modified aluminum oxide is prepared from the following raw materials: aluminum oxide, ammonia water, a coupling agent, polyethylene glycol, phenolic resin and a nitrogen source. Wherein in the sintering process, a nitrogen source, aluminum oxide and a carbon source in the modified aluminum oxide react to be converted into aluminum nitride, aluminum nitride and silicon nitride form a silicon aluminum nitride phase in the sintering process, magnesium elements can be diffused to the surface of silicon aluminum nitride due to addition of magnesium fluoride, silicon aluminum magnesium nitride is formed in situ, and therefore the oxygen content in the sintering phase is effectively reduced; the formation of lattice oxygen is hindered, so that the heat conductivity of the silicon nitride ceramic is further improved.
本申请公开了一种氮化硅陶瓷及其制备方法，涉及陶瓷制备技术领域；该陶瓷包括以下制备原料：改性氧化铝、氟化镁、氮化硅粉、助烧剂和增韧剂；所述助烧剂为氧化钇；所述增韧剂为碳化硅；所述改性氧化铝包括以下制备原料：氧化铝、氨水、偶联剂、聚乙二醇、酚醛树脂和氮源。其中，在烧结过程中改性氧化铝中氮源、氧化铝和碳源反应转化为氮化铝，而氮化铝和氮化硅在烧结过程中形成氮化硅铝相，而氟化镁的添加还会使镁元素扩散至氮化硅铝的表面，原位形成氮化硅铝镁，从而有效降低烧结相中氧含量，阻碍晶格氧的形成，从而进一步提升氮化硅陶瓷的热导率。
Silicon nitride ceramic and preparation method thereof
The invention discloses silicon nitride ceramic and a preparation method thereof, and relates to the technical field of ceramic preparation. The ceramic is prepared from the following raw materials: modified aluminum oxide, magnesium fluoride, silicon nitride powder, a sintering aid and a toughening agent, the sintering aid is yttrium oxide; the flexibilizer is silicon carbide; the modified aluminum oxide is prepared from the following raw materials: aluminum oxide, ammonia water, a coupling agent, polyethylene glycol, phenolic resin and a nitrogen source. Wherein in the sintering process, a nitrogen source, aluminum oxide and a carbon source in the modified aluminum oxide react to be converted into aluminum nitride, aluminum nitride and silicon nitride form a silicon aluminum nitride phase in the sintering process, magnesium elements can be diffused to the surface of silicon aluminum nitride due to addition of magnesium fluoride, silicon aluminum magnesium nitride is formed in situ, and therefore the oxygen content in the sintering phase is effectively reduced; the formation of lattice oxygen is hindered, so that the heat conductivity of the silicon nitride ceramic is further improved.
本申请公开了一种氮化硅陶瓷及其制备方法，涉及陶瓷制备技术领域；该陶瓷包括以下制备原料：改性氧化铝、氟化镁、氮化硅粉、助烧剂和增韧剂；所述助烧剂为氧化钇；所述增韧剂为碳化硅；所述改性氧化铝包括以下制备原料：氧化铝、氨水、偶联剂、聚乙二醇、酚醛树脂和氮源。其中，在烧结过程中改性氧化铝中氮源、氧化铝和碳源反应转化为氮化铝，而氮化铝和氮化硅在烧结过程中形成氮化硅铝相，而氟化镁的添加还会使镁元素扩散至氮化硅铝的表面，原位形成氮化硅铝镁，从而有效降低烧结相中氧含量，阻碍晶格氧的形成，从而进一步提升氮化硅陶瓷的热导率。
Silicon nitride ceramic and preparation method thereof
一种氮化硅陶瓷及其制备方法
LIU QIUSHENG (author) / YE XU (author) / WANG CAN (author)
2024-11-05
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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