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High-toughness aluminum oxide ceramic material as well as preparation method and application thereof
The invention discloses a high-toughness aluminum oxide ceramic material as well as a preparation method and application thereof, and relates to the technical field of aluminum oxide ceramics. The aluminum oxide ceramic material is prepared from composite powder, and the composite powder is prepared from, by mass, 40-89.9% of Al2O3, 0.1-10% of SiO2 and 10-50% of rare earth oxide. A large amount of rare earth oxide, SiO2 and Al2O3 are mixed, Ln4Al2O9 or LnAlO3 (Ln is La, Ce, Y, Sc, Eu, Nd, Sm, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er or Tm) is generated in the sintering process to inhibit grain growth, meanwhile, air holes formed in the sintering process are filled through addition of SiO2, and the mechanical property of aluminum oxide is effectively improved. The fracture toughness of the aluminum oxide ceramic material provided by the embodiment of the invention is not lower than 7MPa. M < 1/2 >, and the bending strength is not lower than 600MPa. The requirement of an electronic device with relatively low heat conduction requirement and high load on high load bearing capacity of an aluminum oxide substrate is met.
本发明公开了一种高强韧氧化铝陶瓷材料及其制备方法和应用，涉及氧化铝陶瓷技术领域。所述氧化铝陶瓷材料由复合粉体制备得到，其中，以质量分数计，所述复合粉体包括：Al2O3 40‑89.9％、SiO20.1‑10％、稀土氧化物10‑50％。通过将大量稀土氧化物，SiO2和Al2O3混合，烧结过程中生成Ln4Al2O9或LnAl O3(Ln为La、Ce、Y、Sc、Eu、Nd、Sm、Pr、Nd、Sm、Eu、Gd、Tb、Dy、Ho、Er、Tm)抑制晶粒长，同时S iO2的加入填补了在烧结过程中形成的气孔，有效提高氧化铝的力学性能。本发明实施例提出的氧化铝陶瓷材料的断裂韧性不低于7MPa·m1/2，弯曲强度不低于600MPa。满足对导热要求较低但负载高的电子器件对氧化铝基板高负载承载力的要求。
High-toughness aluminum oxide ceramic material as well as preparation method and application thereof
The invention discloses a high-toughness aluminum oxide ceramic material as well as a preparation method and application thereof, and relates to the technical field of aluminum oxide ceramics. The aluminum oxide ceramic material is prepared from composite powder, and the composite powder is prepared from, by mass, 40-89.9% of Al2O3, 0.1-10% of SiO2 and 10-50% of rare earth oxide. A large amount of rare earth oxide, SiO2 and Al2O3 are mixed, Ln4Al2O9 or LnAlO3 (Ln is La, Ce, Y, Sc, Eu, Nd, Sm, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er or Tm) is generated in the sintering process to inhibit grain growth, meanwhile, air holes formed in the sintering process are filled through addition of SiO2, and the mechanical property of aluminum oxide is effectively improved. The fracture toughness of the aluminum oxide ceramic material provided by the embodiment of the invention is not lower than 7MPa. M < 1/2 >, and the bending strength is not lower than 600MPa. The requirement of an electronic device with relatively low heat conduction requirement and high load on high load bearing capacity of an aluminum oxide substrate is met.
本发明公开了一种高强韧氧化铝陶瓷材料及其制备方法和应用，涉及氧化铝陶瓷技术领域。所述氧化铝陶瓷材料由复合粉体制备得到，其中，以质量分数计，所述复合粉体包括：Al2O3 40‑89.9％、SiO20.1‑10％、稀土氧化物10‑50％。通过将大量稀土氧化物，SiO2和Al2O3混合，烧结过程中生成Ln4Al2O9或LnAl O3(Ln为La、Ce、Y、Sc、Eu、Nd、Sm、Pr、Nd、Sm、Eu、Gd、Tb、Dy、Ho、Er、Tm)抑制晶粒长，同时S iO2的加入填补了在烧结过程中形成的气孔，有效提高氧化铝的力学性能。本发明实施例提出的氧化铝陶瓷材料的断裂韧性不低于7MPa·m1/2，弯曲强度不低于600MPa。满足对导热要求较低但负载高的电子器件对氧化铝基板高负载承载力的要求。
High-toughness aluminum oxide ceramic material as well as preparation method and application thereof
一种高强韧氧化铝陶瓷材料及其制备方法和应用
WU SHANGHUA (author) / WU HAOLIN (author) / LI YEHUA (author) / LIU LEIREN (author)
2021-07-06
Patent
Electronic Resource
Chinese
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