Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
High-thermal-conductivity silicon nitride material and preparation method thereof
The invention belongs to the technical field of ceramic materials, and relates to a high-thermal-conductivity silicon nitride material and a preparation method thereof.The preparation method comprises the steps that silicon nitride powder, sintering aid powder and a polymer additive are mixed into a mixed raw material and prepared into composite powder particles, the prepared composite powder particles are prepared into a green body, and the green body is sintered; carrying out degumming and air pressure sintering on the prepared green body; the degumming conditions comprise that in the first stage, the temperature is increased to 170-190 DEG C from room temperature at a first preset speed, heat preservation is performed for 8-20 min, and meanwhile inert gas is introduced at a preset flow to reach first preset pressure; in the second stage, the temperature is directly increased to 550-600 DEG C from 170-190 DEG C at a second preset speed, and heat preservation is conducted for 10-20 min under second preset pressure. The thermal conductivity of the silicon nitride material is remarkably improved without adding other components such as a polymer additive, and meanwhile, the method has the advantages of low cost, simplicity and safety in operation, convenience in batch production and the like.
本发明属于陶瓷材料技术领域，涉及一种高导热氮化硅材料及其制备方法，所述制备方法包括将氮化硅粉体、烧结助剂粉体和高分子添加剂混合为混合原料并制成复合粉末颗粒，将制成的复合粉末颗粒制成坯体，将制成的坯体进行脱胶和气压烧结；所述脱胶的条件包括：第一阶段以第一预设速度从室温升温至170‑190℃保温8‑20min，同时以预设流量通入惰性气体达到第一预设压力；第二阶段再以第二预设速度从170‑190℃直接升温至550‑600℃，且在第二预设压力下保温10‑20min。无需另外加入高分子添加剂等其他成分，实现对氮化硅材料的热导率显著提升，同时兼具成本低、操作简洁安全、便于批量化生产等优势。
High-thermal-conductivity silicon nitride material and preparation method thereof
The invention belongs to the technical field of ceramic materials, and relates to a high-thermal-conductivity silicon nitride material and a preparation method thereof.The preparation method comprises the steps that silicon nitride powder, sintering aid powder and a polymer additive are mixed into a mixed raw material and prepared into composite powder particles, the prepared composite powder particles are prepared into a green body, and the green body is sintered; carrying out degumming and air pressure sintering on the prepared green body; the degumming conditions comprise that in the first stage, the temperature is increased to 170-190 DEG C from room temperature at a first preset speed, heat preservation is performed for 8-20 min, and meanwhile inert gas is introduced at a preset flow to reach first preset pressure; in the second stage, the temperature is directly increased to 550-600 DEG C from 170-190 DEG C at a second preset speed, and heat preservation is conducted for 10-20 min under second preset pressure. The thermal conductivity of the silicon nitride material is remarkably improved without adding other components such as a polymer additive, and meanwhile, the method has the advantages of low cost, simplicity and safety in operation, convenience in batch production and the like.
本发明属于陶瓷材料技术领域，涉及一种高导热氮化硅材料及其制备方法，所述制备方法包括将氮化硅粉体、烧结助剂粉体和高分子添加剂混合为混合原料并制成复合粉末颗粒，将制成的复合粉末颗粒制成坯体，将制成的坯体进行脱胶和气压烧结；所述脱胶的条件包括：第一阶段以第一预设速度从室温升温至170‑190℃保温8‑20min，同时以预设流量通入惰性气体达到第一预设压力；第二阶段再以第二预设速度从170‑190℃直接升温至550‑600℃，且在第二预设压力下保温10‑20min。无需另外加入高分子添加剂等其他成分，实现对氮化硅材料的热导率显著提升，同时兼具成本低、操作简洁安全、便于批量化生产等优势。
High-thermal-conductivity silicon nitride material and preparation method thereof
一种高导热氮化硅材料及其制备方法
QI QIN (Autor:in) / WANG CAIFEN (Autor:in) / ZHANG PENGCHENG (Autor:in) / ZHU YUXUAN (Autor:in) / ZHANG XIANGDONG (Autor:in) / DONG XIANFENG (Autor:in) / LEE SUN-YONG (Autor:in) / BAI BIN (Autor:in)
25.07.2023
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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