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A platform for research: civil engineering, architecture and urbanism
Composite ceramic as well as preparation method and application thereof
The invention belongs to the technical field of ceramic materials, and particularly relates to composite ceramic and a preparation method and application thereof. Silicon nitride, BN, metal powder and a sintering aid are mixed and then pressurized, an obtained blank is subjected to vacuum heat treatment and then sintered, the added BN and the metal powder can be subjected to a chemical reaction at a high temperature, and a TiB2 or ZrB2 hard conductive phase is introduced; the hard conductive phase is introduced, so that the mechanical property of the composite ceramic is improved, the conductivity of the composite ceramic can be adjusted along with the addition of the hard conductive phase, the hard conductive phase is used as conductive ceramic, silicon nitride is used as insulating ceramic, and the conductivity is enhanced along with the increase of the content of the hard conductive phase. According to the preparation method provided by the invention, the compactness of the sintered body can be remarkably improved, so that the hardness, strength, toughness and other properties of the silicon nitride ceramic are greatly improved.
本发明属于陶瓷材料技术领域，具体涉及一种复合陶瓷及其制备方法和应用。本发明将氮化硅、BN、金属粉和烧结助剂混料后加压，然后将所得坯体真空热处理后烧结，加入的BN与金属粉在高温下可以发生化学反应，引入TiB2或ZrB2硬质导电相；引入硬质导电相，不仅提高了复合陶瓷的力学性能，而且随着硬质导电相的加入可以对其导电性进行调节，硬质导电相作为导电陶瓷，氮化硅作为绝缘陶瓷，随着硬质导电相含量的增加，导电性增强。本发明提供的制备方法可以显著提高烧结体的致密性，从而大大地提高氮化硅陶瓷的硬度、强度和韧性等性能。
Composite ceramic as well as preparation method and application thereof
The invention belongs to the technical field of ceramic materials, and particularly relates to composite ceramic and a preparation method and application thereof. Silicon nitride, BN, metal powder and a sintering aid are mixed and then pressurized, an obtained blank is subjected to vacuum heat treatment and then sintered, the added BN and the metal powder can be subjected to a chemical reaction at a high temperature, and a TiB2 or ZrB2 hard conductive phase is introduced; the hard conductive phase is introduced, so that the mechanical property of the composite ceramic is improved, the conductivity of the composite ceramic can be adjusted along with the addition of the hard conductive phase, the hard conductive phase is used as conductive ceramic, silicon nitride is used as insulating ceramic, and the conductivity is enhanced along with the increase of the content of the hard conductive phase. According to the preparation method provided by the invention, the compactness of the sintered body can be remarkably improved, so that the hardness, strength, toughness and other properties of the silicon nitride ceramic are greatly improved.
本发明属于陶瓷材料技术领域，具体涉及一种复合陶瓷及其制备方法和应用。本发明将氮化硅、BN、金属粉和烧结助剂混料后加压，然后将所得坯体真空热处理后烧结，加入的BN与金属粉在高温下可以发生化学反应，引入TiB2或ZrB2硬质导电相；引入硬质导电相，不仅提高了复合陶瓷的力学性能，而且随着硬质导电相的加入可以对其导电性进行调节，硬质导电相作为导电陶瓷，氮化硅作为绝缘陶瓷，随着硬质导电相含量的增加，导电性增强。本发明提供的制备方法可以显著提高烧结体的致密性，从而大大地提高氮化硅陶瓷的硬度、强度和韧性等性能。
Composite ceramic as well as preparation method and application thereof
一种复合陶瓷及其制备方法和应用
MO PEICHENG (author) / CHEN JIARONG (author) / CHEN CHAO (author) / PAN XIAOYI (author) / ZHANG JUN (author) / LI KAI (author) / QIN HAIQING (author)
2024-01-09
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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