耐火材料 ›› 2021, Vol. 55 ›› Issue (2): 131-134.DOI: 10.3969/j.issn.1001-1935.2021.02.009

• 研究开发 • 上一篇    下一篇

碳化硅-金刚石陶瓷的制备及其导热性能

孙祥运(), 陈浩, 王顺琴, 杨会, 海文静, 覃发恋, 罗团生, 海万秀(), 陈宇红   

  1. 北方民族大学 材料科学与工程学院 宁夏银川 750021
  • 收稿日期:2020-11-12 出版日期:2021-04-15 发布日期:2021-04-15
  • 作者简介:孙祥运:男,1997年生,本科。E-mail:1606331868@qq.com
  • 基金资助:
    国家级大学生创新训练项目(2019-11407-024);北方民族大学研究生创新项目(YCX20126);省部共建粉体材料与特种陶瓷重点实验室项目(1806);宁夏工程科技发展战略宁夏研究院咨询项目(2018ZLZX0006)

Preparation and thermal conductivity of SiC-diamond ceramics

Sun Xiangyun(), Chen Hao, Wang Shunqin, Yang Hui, Hai Wenjing, Qin Falian, Luo Tuansheng, Hai Wanxiu(), Chen Yuhong   

  1. College of Materials Science and Engineering,North Minzu University,Yinchuan 750021,Ningxia,China
  • Received:2020-11-12 Online:2021-04-15 Published:2021-04-15

摘要:

以碳化硅(SiC)和金刚石为原料,以氧化铝和氧化钇为烧结助剂,在1 850 ℃保温1 h无压烧结制备了SiC-金刚石陶瓷。研究了金刚石含量(质量分数分别为0、0.25%、0.5%、1.0%、2.5%、5%)对SiC-金刚石陶瓷性能的影响。结果表明:随金刚石含量(0.25%~5%(w))的增加,SiC-金刚石陶瓷的致密度逐渐下降,晶粒尺寸先增大后减小。当添加0.25%(w)的金刚石时,试样性能最好,其致密度、热导率和比热容分别为90.3%、83.2 W·m-1·K-1和0.71 J·g-1·K-1

关键词: 碳化硅, 金刚石, 热导率, 致密度

Abstract:

SiC-diamond ceramics were prepared using SiC and diamond as raw materials,alumina and yttrium oxide as sintering agents,and pressureless firing at 1 850 ℃ for 1 h.Effect of diamond addition (0,0.25%,0.5%,1.0%,2.5%,and 5%,by mass) on properties of the SiC-diamond ceramics was researched.The results show that with the diamond addition increasing from 0.25% to 5%,the density of SiC-diamond ceramics decreases gradually,while the grain size increases first and then decreases.With 0.25% diamond,the ceramics perform the best properties,the density of 90.3%,the thermal conductivity of 83.2 W·m-1·K-1,and the specific heat capacity of 0.71 J·g-1·K-1.

Key words: silicon carbide, diamond, thermal conductivity, density

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