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High-performance silicon nitride ceramic as well as preparation method and application thereof
The invention belongs to the technical field of ceramic materials, and discloses high-performance silicon nitride ceramic as well as a preparation method and application thereof. The method comprises the following steps: by taking Si powder as a matrix raw material and ZrO2-YF3-MgSiN2 as a sintering aid, carrying out high-energy shear mixing treatment to obtain Si-ZrO2-MgSiN2-YF3 mixed powder coated layer by layer, and then carrying out nitriding treatment and post-sintering treatment to prepare the silicon nitride ceramic with high performance and high thermal conductivity. The technological process of the silicon nitride ceramic is simple, ZrO2 is introduced into the Si powder to promote nitridation of the Si powder and inhibit phase change from alpha to beta-Si3N4, SiO2 generated by nitridation treatment is reduced through sintering aids MgSiN2 and YF3, so that the lattice oxygen content is reduced, an interlocked compact double-peak microstructure is formed in cooperation with a sintering process, and the silicon nitride ceramic is prepared. The ceramic has excellent mechanical properties and high thermal conductivity, and can be used in the fields of automotive electronics, aerospace and the like.
本发明属于陶瓷材料技术领域，公开了一种高性能的氮化硅陶瓷及其制备方法和应用。该方法是以Si粉为基体原料，以ZrO2‑YF3‑MgSiN2为烧结助剂，通过高能剪切混合处理得到逐层包覆的Si‑ZrO2‑MgSiN2‑YF3混合粉体，再经过氮化处理与后烧结处理，制得高性能高导热的氮化硅陶瓷。本发明氮化硅陶瓷的工艺过程简单，通过向Si粉引入ZrO2促进Si粉氮化且抑制α→β‑Si3N4的相变，又通过烧结助剂MgSiN2与YF3还原氮化处理生成的SiO2，从而降低了晶格氧含量，并且配合烧结工艺形成了互锁的致密双峰微观结构，陶瓷具有优异的力学性能和较高的热导率，可以用于汽车电子、航天航空等领域。
High-performance silicon nitride ceramic as well as preparation method and application thereof
The invention belongs to the technical field of ceramic materials, and discloses high-performance silicon nitride ceramic as well as a preparation method and application thereof. The method comprises the following steps: by taking Si powder as a matrix raw material and ZrO2-YF3-MgSiN2 as a sintering aid, carrying out high-energy shear mixing treatment to obtain Si-ZrO2-MgSiN2-YF3 mixed powder coated layer by layer, and then carrying out nitriding treatment and post-sintering treatment to prepare the silicon nitride ceramic with high performance and high thermal conductivity. The technological process of the silicon nitride ceramic is simple, ZrO2 is introduced into the Si powder to promote nitridation of the Si powder and inhibit phase change from alpha to beta-Si3N4, SiO2 generated by nitridation treatment is reduced through sintering aids MgSiN2 and YF3, so that the lattice oxygen content is reduced, an interlocked compact double-peak microstructure is formed in cooperation with a sintering process, and the silicon nitride ceramic is prepared. The ceramic has excellent mechanical properties and high thermal conductivity, and can be used in the fields of automotive electronics, aerospace and the like.
本发明属于陶瓷材料技术领域，公开了一种高性能的氮化硅陶瓷及其制备方法和应用。该方法是以Si粉为基体原料，以ZrO2‑YF3‑MgSiN2为烧结助剂，通过高能剪切混合处理得到逐层包覆的Si‑ZrO2‑MgSiN2‑YF3混合粉体，再经过氮化处理与后烧结处理，制得高性能高导热的氮化硅陶瓷。本发明氮化硅陶瓷的工艺过程简单，通过向Si粉引入ZrO2促进Si粉氮化且抑制α→β‑Si3N4的相变，又通过烧结助剂MgSiN2与YF3还原氮化处理生成的SiO2，从而降低了晶格氧含量，并且配合烧结工艺形成了互锁的致密双峰微观结构，陶瓷具有优异的力学性能和较高的热导率，可以用于汽车电子、航天航空等领域。
High-performance silicon nitride ceramic as well as preparation method and application thereof
一种高性能的氮化硅陶瓷及其制备方法和应用
GUO WEIMING (Autor:in) / LI ZEHUA (Autor:in) / YU JUNJIE (Autor:in) / LIN HUATAI (Autor:in)
30.04.2024
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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