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Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Porous silicon nitride ceramic and preparation method thereof
The invention relates to a porous silicon nitride ceramic and a preparation method thereof, and belongs to the technical field of ceramic materials, the silicon nitride ceramic is prepared from pure silicon nitride powder through powder burying and sintering, a microstructure in which long rod-like crystal grains are mutually lapped is formed, the long rod-like crystal grains are composed of beta-Si3N4, the total porosity of the silicon nitride ceramic is 30-70%, and the porosity of the silicon nitride ceramic is 30-70%. The bending strength is 40-600 MPa, and the linear shrinkage rate is 0.2%-1%. Compared with the prior art, the porous silicon nitride ceramic disclosed by the invention has the advantages of no grain boundary impure phase, perfect grain development, small product shrinkage, excellent performance and the like.
本发明涉及一种多孔氮化硅陶瓷及其制备方法，属于陶瓷材料技术领域，所述氮化硅陶瓷由纯氮化硅粉制成，经埋粉烧结而得，形成了长棒状晶粒相互搭接的微结构，所述长棒状晶粒由β‑Si3N4组成，所述氮化硅陶瓷的总气孔率为30％～70％，弯曲强度为40～600MPa，线收缩率为0.2％～1％。与现有技术相比，本发明的多孔氮化硅陶瓷无晶界杂相及晶粒发育完善，具有产品收缩小和性能出色等优点。
Porous silicon nitride ceramic and preparation method thereof
The invention relates to a porous silicon nitride ceramic and a preparation method thereof, and belongs to the technical field of ceramic materials, the silicon nitride ceramic is prepared from pure silicon nitride powder through powder burying and sintering, a microstructure in which long rod-like crystal grains are mutually lapped is formed, the long rod-like crystal grains are composed of beta-Si3N4, the total porosity of the silicon nitride ceramic is 30-70%, and the porosity of the silicon nitride ceramic is 30-70%. The bending strength is 40-600 MPa, and the linear shrinkage rate is 0.2%-1%. Compared with the prior art, the porous silicon nitride ceramic disclosed by the invention has the advantages of no grain boundary impure phase, perfect grain development, small product shrinkage, excellent performance and the like.
本发明涉及一种多孔氮化硅陶瓷及其制备方法，属于陶瓷材料技术领域，所述氮化硅陶瓷由纯氮化硅粉制成，经埋粉烧结而得，形成了长棒状晶粒相互搭接的微结构，所述长棒状晶粒由β‑Si3N4组成，所述氮化硅陶瓷的总气孔率为30％～70％，弯曲强度为40～600MPa，线收缩率为0.2％～1％。与现有技术相比，本发明的多孔氮化硅陶瓷无晶界杂相及晶粒发育完善，具有产品收缩小和性能出色等优点。
Porous silicon nitride ceramic and preparation method thereof
一种多孔氮化硅陶瓷及其制备方法
TIAN YUNLONG (Autor:in) / GUO FANGQUAN (Autor:in) / QI HAI (Autor:in) / HAN WEIYUE (Autor:in)
21.01.2025
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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