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Al2O3/ZrO2 composite ceramic based on azeotropic distillation method as well as preparation method and application of Al2O3/ZrO2 composite ceramic
The invention discloses Al2O3/ZrO2 composite ceramic based on an azeotropic distillation method as well as a preparation method and application of the Al2O3/ZrO2 composite ceramic. According to the preparation method, zirconium salt, yttrium salt, aluminum salt and lanthanum salt are used as raw materials, nanoscale composite powder is prepared through a coprecipitation method and an azeotropic distillation method, and the Al2O3/ZrO2 composite ceramic is obtained through forming, calcining and high-temperature sintering. The obtained composite powder is nanoscale, basically spherical, uniformin particle size distribution and wide in sintering temperature range. Al2O3 crystal grains and long rod-shaped LaAl11O18 crystal grains which grow in situ are distributed in a ZrO2 matrix in a dispersion manner, meanwhile, a phase change toughening mechanism, a particle toughening mechanism and a whisker toughening mechanism are introduced, so that the fracture toughness, the bending strength andthe hardness of the ceramic material are improved. The composite material further has good ageing resistance, integrates good mechanical properties and high stability and can be used for a 5G mobilephone ceramic backboard, and the preparation method is simple, easy to operate and beneficial to large-scale production.
本发明公开了基于共沸蒸馏法的AlO/ZrO复合陶瓷及其制备方法与应用，该制备方法以锆盐、钇盐、铝盐、镧盐为原料，通过共沉淀法和共沸蒸馏法制得纳米级复合粉末，经成型、煅烧并高温烧结后得到AlO/ZrO复合陶瓷。本发明得到的复合粉末为纳米级，基本呈球形、粒径分布均匀，烧结温度范围宽；ZrO基体中弥散分布着AlO晶粒和原位生长的长棒状LaAlO晶粒，同时引入相变增韧、颗粒增韧和晶须增韧机制，提高陶瓷材料的断裂韧性、抗弯强度和硬度，复合材料还具有很好的抗老化性能，集良好力学性能与高稳定性于一体，可用于5G手机陶瓷背板，其制备方法简单，易于操作，有利于规模化生产。
Al2O3/ZrO2 composite ceramic based on azeotropic distillation method as well as preparation method and application of Al2O3/ZrO2 composite ceramic
The invention discloses Al2O3/ZrO2 composite ceramic based on an azeotropic distillation method as well as a preparation method and application of the Al2O3/ZrO2 composite ceramic. According to the preparation method, zirconium salt, yttrium salt, aluminum salt and lanthanum salt are used as raw materials, nanoscale composite powder is prepared through a coprecipitation method and an azeotropic distillation method, and the Al2O3/ZrO2 composite ceramic is obtained through forming, calcining and high-temperature sintering. The obtained composite powder is nanoscale, basically spherical, uniformin particle size distribution and wide in sintering temperature range. Al2O3 crystal grains and long rod-shaped LaAl11O18 crystal grains which grow in situ are distributed in a ZrO2 matrix in a dispersion manner, meanwhile, a phase change toughening mechanism, a particle toughening mechanism and a whisker toughening mechanism are introduced, so that the fracture toughness, the bending strength andthe hardness of the ceramic material are improved. The composite material further has good ageing resistance, integrates good mechanical properties and high stability and can be used for a 5G mobilephone ceramic backboard, and the preparation method is simple, easy to operate and beneficial to large-scale production.
本发明公开了基于共沸蒸馏法的AlO/ZrO复合陶瓷及其制备方法与应用，该制备方法以锆盐、钇盐、铝盐、镧盐为原料，通过共沉淀法和共沸蒸馏法制得纳米级复合粉末，经成型、煅烧并高温烧结后得到AlO/ZrO复合陶瓷。本发明得到的复合粉末为纳米级，基本呈球形、粒径分布均匀，烧结温度范围宽；ZrO基体中弥散分布着AlO晶粒和原位生长的长棒状LaAlO晶粒，同时引入相变增韧、颗粒增韧和晶须增韧机制，提高陶瓷材料的断裂韧性、抗弯强度和硬度，复合材料还具有很好的抗老化性能，集良好力学性能与高稳定性于一体，可用于5G手机陶瓷背板，其制备方法简单，易于操作，有利于规模化生产。
Al2O3/ZrO2 composite ceramic based on azeotropic distillation method as well as preparation method and application of Al2O3/ZrO2 composite ceramic
基于共沸蒸馏法的AlO/ZrO复合陶瓷及其制备方法与应用
RAO PINGGEN (Autor:in) / HUANG XUEJUAN (Autor:in)
04.09.2020
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
/
B28B
Formgeben von Ton oder anderen keramischen Stoffzusammensetzungen, Schlacke oder von Mischungen, die zementartiges Material enthalten, z.B. Putzmörtel
,
SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS, SLAG OR MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
/
H04M
TELEPHONIC COMMUNICATION
,
Fernsprechverkehr
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