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The invention relates to a preparation process for preparing high-thermal-conductivity and high-strength aluminum nitride ceramic through gel-method injection molding. According to the nitrided ceramic disclosed by the invention, aluminum nitride mixed powder with different particle size grading is taken as a raw material, a complex-phase active inorganic sintering aid is added, the sintering aid is one or more of calcium borate, calcium meta-borate and calcium magnesium borate, and the material cost of the sintering aid is low; meanwhile, special equipment is not needed, a sample in a complex shape can be formed, densification of the aluminum nitride ceramic can be achieved at the low temperature, the requirement of sintering on the equipment is low, the complex-phase active inorganic sintering aid can balance the sintering rate of different particles, oxygen in the aluminum nitride powder can be removed, and the aluminum nitride ceramic with the uniform and compact structure is obtained; and the heat conductivity of the aluminum nitride ceramic is improved.
本发明涉及一种凝胶法注模制备高导热和高强度氮化铝陶瓷的制备工艺。本发明的氮化陶瓷以不同颗粒度级配的氮化铝混合粉为原料，添加复相活性无机烧结助剂，烧结助剂为硼酸钙、偏硼酸钙、硼酸钙镁中的一种或者几种混合，烧结助剂材料成本低；同时不需要专门的设备，可实现成型复杂形状样品，并在较低的温度下即可实现氮化铝陶瓷的致密化，烧结对设备的要求低，复相活性无机烧结助剂能够平衡不同颗粒的烧结速率，去除氮化铝粉末中的氧，得到结构均匀致密的氮化铝陶瓷，提高氮化铝陶瓷的热导率。
The invention relates to a preparation process for preparing high-thermal-conductivity and high-strength aluminum nitride ceramic through gel-method injection molding. According to the nitrided ceramic disclosed by the invention, aluminum nitride mixed powder with different particle size grading is taken as a raw material, a complex-phase active inorganic sintering aid is added, the sintering aid is one or more of calcium borate, calcium meta-borate and calcium magnesium borate, and the material cost of the sintering aid is low; meanwhile, special equipment is not needed, a sample in a complex shape can be formed, densification of the aluminum nitride ceramic can be achieved at the low temperature, the requirement of sintering on the equipment is low, the complex-phase active inorganic sintering aid can balance the sintering rate of different particles, oxygen in the aluminum nitride powder can be removed, and the aluminum nitride ceramic with the uniform and compact structure is obtained; and the heat conductivity of the aluminum nitride ceramic is improved.
本发明涉及一种凝胶法注模制备高导热和高强度氮化铝陶瓷的制备工艺。本发明的氮化陶瓷以不同颗粒度级配的氮化铝混合粉为原料，添加复相活性无机烧结助剂，烧结助剂为硼酸钙、偏硼酸钙、硼酸钙镁中的一种或者几种混合，烧结助剂材料成本低；同时不需要专门的设备，可实现成型复杂形状样品，并在较低的温度下即可实现氮化铝陶瓷的致密化，烧结对设备的要求低，复相活性无机烧结助剂能够平衡不同颗粒的烧结速率，去除氮化铝粉末中的氧，得到结构均匀致密的氮化铝陶瓷，提高氮化铝陶瓷的热导率。
Preparation process for preparing high-thermal-conductivity and high-strength aluminum nitride ceramic through gel-method injection molding
一种凝胶法注模制备高导热和高强度氮化铝陶瓷的制备工艺
LIN WEIYI (author)
2021-05-25
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
Method for preparing aluminum nitride ceramic through injection molding
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