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Hexagonal boron nitride ceramic and preparation method thereof
The invention provides hexagonal boron nitride ceramic and a preparation method thereof, the hexagonal boron nitride ceramic comprises a main phase and a dispersed phase, the main phase comprises h-BN, and the dispersed phase comprises Al2Y4O9; the apparent porosity of the hexagonal boron nitride ceramic is less than or equal to 5%, and the density is greater than or equal to 90%; according to the preparation method, h-BN and a sintering aid are mixed and sintered, the high-density hexagonal boron nitride ceramic containing specific crystalline phase components is obtained, and the obtained hexagonal boron nitride ceramic has the elastic modulus larger than or equal to 20.0 GPa and the bending strength larger than or equal to 100 MPa; the preparation method is simple in process, is beneficial to preparation of large-size boron nitride ceramic components, has relatively low sintering temperature, and is beneficial to cost reduction and promotion of large-scale industrial production.
本发明提供了一种六方氮化硼陶瓷及其制备方法，所述六方氮化硼陶瓷包括主相及分散相，所述主相包括h‑BN，所述分散相包括Al2Y4O9；所述六方氮化硼陶瓷的显气孔率≤5％、致密度≥90％；所述制备方法将h‑BN与烧结助剂混合后烧结，得到含有特定晶相成分的高致密六方氮化硼陶瓷，且所得六方氮化硼陶瓷具有≥20.0GPa的弹性模量及≥100MPa的弯曲强度；所述制备方法工艺简单，有利于制备大尺寸氮化硼陶瓷构件，且具有相对较低的烧结温度，有利于降低成本并促进大规模工业生产。
Hexagonal boron nitride ceramic and preparation method thereof
The invention provides hexagonal boron nitride ceramic and a preparation method thereof, the hexagonal boron nitride ceramic comprises a main phase and a dispersed phase, the main phase comprises h-BN, and the dispersed phase comprises Al2Y4O9; the apparent porosity of the hexagonal boron nitride ceramic is less than or equal to 5%, and the density is greater than or equal to 90%; according to the preparation method, h-BN and a sintering aid are mixed and sintered, the high-density hexagonal boron nitride ceramic containing specific crystalline phase components is obtained, and the obtained hexagonal boron nitride ceramic has the elastic modulus larger than or equal to 20.0 GPa and the bending strength larger than or equal to 100 MPa; the preparation method is simple in process, is beneficial to preparation of large-size boron nitride ceramic components, has relatively low sintering temperature, and is beneficial to cost reduction and promotion of large-scale industrial production.
本发明提供了一种六方氮化硼陶瓷及其制备方法，所述六方氮化硼陶瓷包括主相及分散相，所述主相包括h‑BN，所述分散相包括Al2Y4O9；所述六方氮化硼陶瓷的显气孔率≤5％、致密度≥90％；所述制备方法将h‑BN与烧结助剂混合后烧结，得到含有特定晶相成分的高致密六方氮化硼陶瓷，且所得六方氮化硼陶瓷具有≥20.0GPa的弹性模量及≥100MPa的弯曲强度；所述制备方法工艺简单，有利于制备大尺寸氮化硼陶瓷构件，且具有相对较低的烧结温度，有利于降低成本并促进大规模工业生产。
Hexagonal boron nitride ceramic and preparation method thereof
一种六方氮化硼陶瓷及其制备方法
ZHANG WEIGANG (author) / YANG HAIJUN (author) / SUN XIAOMING (author) / GE MIN (author) / ZHANG HUIFENG (author) / QIAO JIAHAO (author) / WANG ZHIGUANG (author)
2023-12-29
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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