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Aluminum tantalate powder and preparation method thereof, and aluminum tantalate ceramic and preparation method and application thereof
The invention relates to the technical field of high-temperature materials, and provides aluminum tantalate powder and a preparation method thereof, and aluminum tantalate ceramic and a preparation method and application thereof. The aluminum tantalate powder prepared by adopting a solution method has a nano-scale size to achieve a filling effect, micron-scale aluminum oxide serves as a framework to achieve a supporting effect, and an Al2O3 phase and an AlTaO4 phase do not react at a high temperature and can stably exist for a long time; al2O3 is dispersed and distributed in an AlTaO4 phase in the form of a second phase to play a pinning role, grain growth, porosity and crack shrinkage are inhibited, and the sintering resistance of the material is improved; due to the existence of the two-phase ceramic, the phase boundary area is increased, the heat conductivity is reduced, the fracture toughness of the material is improved, even if the material cracks in the using process, the peeling failure process is started from the nanoscale ceramic, the peeling failure condition of the whole ceramic material is prevented, and the service life of the material is greatly prolonged.
本发明涉及高温材料技术领域，本发明提供了一种钽酸铝粉体及其制备方法以及一种钽酸铝陶瓷及其制备方法和应用。采用溶液法制备得到的钽酸铝粉体为纳米级别的尺寸达到填充的作用，微米级别的氧化铝作为骨架起到支持作用，Al2O3相与AlTaO4相在高温下不发生反应，能够长期稳定存在；Al2O3以第二相的形式弥散分布在AlTaO4相中起到钉扎的作用，抑制晶粒长大、气孔率和裂纹收缩，提高材料的抗烧结性能；两相陶瓷的存在增大了相界面积，降低了热导率，提高了材料的断裂韧性，即使材料在使用过程中出现了裂纹，剥落失效过程是从纳米级别的陶瓷开始进行的，防止了整块陶瓷材料剥落失效情况的出现，大幅度提高了材料的使用寿命。
Aluminum tantalate powder and preparation method thereof, and aluminum tantalate ceramic and preparation method and application thereof
The invention relates to the technical field of high-temperature materials, and provides aluminum tantalate powder and a preparation method thereof, and aluminum tantalate ceramic and a preparation method and application thereof. The aluminum tantalate powder prepared by adopting a solution method has a nano-scale size to achieve a filling effect, micron-scale aluminum oxide serves as a framework to achieve a supporting effect, and an Al2O3 phase and an AlTaO4 phase do not react at a high temperature and can stably exist for a long time; al2O3 is dispersed and distributed in an AlTaO4 phase in the form of a second phase to play a pinning role, grain growth, porosity and crack shrinkage are inhibited, and the sintering resistance of the material is improved; due to the existence of the two-phase ceramic, the phase boundary area is increased, the heat conductivity is reduced, the fracture toughness of the material is improved, even if the material cracks in the using process, the peeling failure process is started from the nanoscale ceramic, the peeling failure condition of the whole ceramic material is prevented, and the service life of the material is greatly prolonged.
本发明涉及高温材料技术领域，本发明提供了一种钽酸铝粉体及其制备方法以及一种钽酸铝陶瓷及其制备方法和应用。采用溶液法制备得到的钽酸铝粉体为纳米级别的尺寸达到填充的作用，微米级别的氧化铝作为骨架起到支持作用，Al2O3相与AlTaO4相在高温下不发生反应，能够长期稳定存在；Al2O3以第二相的形式弥散分布在AlTaO4相中起到钉扎的作用，抑制晶粒长大、气孔率和裂纹收缩，提高材料的抗烧结性能；两相陶瓷的存在增大了相界面积，降低了热导率，提高了材料的断裂韧性，即使材料在使用过程中出现了裂纹，剥落失效过程是从纳米级别的陶瓷开始进行的，防止了整块陶瓷材料剥落失效情况的出现，大幅度提高了材料的使用寿命。
Aluminum tantalate powder and preparation method thereof, and aluminum tantalate ceramic and preparation method and application thereof
一种钽酸铝粉体及其制备方法以及一种钽酸铝陶瓷及其制备方法和应用
FENG JING (author) / CHEN LIN (author) / WANG JIANKUN (author) / LYU LIANG (author) / SU CHAOQUN (author) / LI KE (author) / WANG YUNCHENG (author)
2023-01-06
Patent
Electronic Resource
Chinese
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