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Spherical silicon nitride powder as well as preparation method and application thereof
The invention discloses spherical silicon nitride powder as well as a preparation method and application thereof, and belongs to the field of nitride ceramic materials. According to the spherical silicon nitride powder, the content of beta-phase silicon nitride is larger than or equal to 95%, the average sphericity degree is larger than or equal to 0.80, the tap density ranges from 1.9 g/cm < 3 > to 2.2 g/cm < 3 >, and the particle size ranges from 10 micrometers to 170 micrometers; the preparation method comprises the following steps: in an organic solvent, taking beta-Si3N4 as an aggregate, taking a silicon nitride precursor as an activating agent, taking a beta-diketone rare earth complex as a sintering aid and taking a mixture of polysilazane and PVB as a binder, performing pretreatment, and performing high-temperature sintering in a nitrogen atmosphere to obtain spherical silicon nitride powder; the prepared spherical silicon nitride powder can be used as a raw material for preparing an insulating heat-conducting material. The preparation of the high-density and high-heat-conductivity spherical silicon nitride powder can be realized, and the prepared insulating heat-conducting material is high in heat conductivity.
本发明公开了一种球形氮化硅粉体及其制备方法、应用，属于氮化物陶瓷材料领域。本发明的球形氮化硅粉体β相氮化硅含量≥95％，平均球形度≥0.80，振实密度范围为1.9～2.2g/cm3，粒径范围为10～170μm；制备方法为：在有机溶剂中，以β‑Si3N4为骨料、以氮化硅前驱物为活化剂，以β‑二酮稀土配合物作为烧结助剂，以聚硅氮烷和PVB的混合物作为粘结剂，经预处理后，于氮气气氛下高温烧结得球形氮化硅粉体；制得的球形氮化硅粉体可以作为制备绝缘导热材料的原料。本发明能实现高致密度和高导热球形氮化硅粉体的制备，并且制备的绝缘导热材料热导率高。
Spherical silicon nitride powder as well as preparation method and application thereof
The invention discloses spherical silicon nitride powder as well as a preparation method and application thereof, and belongs to the field of nitride ceramic materials. According to the spherical silicon nitride powder, the content of beta-phase silicon nitride is larger than or equal to 95%, the average sphericity degree is larger than or equal to 0.80, the tap density ranges from 1.9 g/cm < 3 > to 2.2 g/cm < 3 >, and the particle size ranges from 10 micrometers to 170 micrometers; the preparation method comprises the following steps: in an organic solvent, taking beta-Si3N4 as an aggregate, taking a silicon nitride precursor as an activating agent, taking a beta-diketone rare earth complex as a sintering aid and taking a mixture of polysilazane and PVB as a binder, performing pretreatment, and performing high-temperature sintering in a nitrogen atmosphere to obtain spherical silicon nitride powder; the prepared spherical silicon nitride powder can be used as a raw material for preparing an insulating heat-conducting material. The preparation of the high-density and high-heat-conductivity spherical silicon nitride powder can be realized, and the prepared insulating heat-conducting material is high in heat conductivity.
本发明公开了一种球形氮化硅粉体及其制备方法、应用，属于氮化物陶瓷材料领域。本发明的球形氮化硅粉体β相氮化硅含量≥95％，平均球形度≥0.80，振实密度范围为1.9～2.2g/cm3，粒径范围为10～170μm；制备方法为：在有机溶剂中，以β‑Si3N4为骨料、以氮化硅前驱物为活化剂，以β‑二酮稀土配合物作为烧结助剂，以聚硅氮烷和PVB的混合物作为粘结剂，经预处理后，于氮气气氛下高温烧结得球形氮化硅粉体；制得的球形氮化硅粉体可以作为制备绝缘导热材料的原料。本发明能实现高致密度和高导热球形氮化硅粉体的制备，并且制备的绝缘导热材料热导率高。
Spherical silicon nitride powder as well as preparation method and application thereof
一种球形氮化硅粉体及其制备方法、应用
HAN ZHAO (author) / ZHANG XIAOYU (author) / TONG BIHAI (author) / LIU PENGFEI (author)
2024-09-10
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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