固相反应法合成碳化硼纳米粉体

无机材料学报, 2011, 26(10): 1101-1104. doi: 10.3724/SP.J.1077.2011.01101

固相反应法合成碳化硼纳米粉体

(1. 中国科学院上海硅酸盐研究所, 高性能陶瓷和超微结构国家重点实验室, 上海200050

2. 2. 中国科学院研究生院, 北京100049)

(1. State Key Laboratory of High Performance Ceramics and Superfine Microstructures, Shanghai Institute of Ceramics, Shanghai 200050, China

2. 2. Graduate University of the Chinese Academy of Sciences, Beijing 100049, China)

基金项目: 国家自然科学基金(50972152, 51002169)

关键词：碳化硼 , boron nitride , carbon black , nano powder

Synthesis of Boron Carbide Nano Powder by Solid State Reaction

ZENG Hong , KAN Yan-Mei , XU Chang-Ming , WANG Pei-Ling , ZHANG Guo-Jun

Keywords： boron carbide , 氮化硼 , 炭黑 , 纳米粉体

以六方氮化硼和炭黑(或石墨)为原料, 采用固相反应法合成了碳化硼粉体. 碳源、反应气氛和温度对粉体合成产生重要影响. 以炭黑为碳源, 在1900℃真空下保温5 h, 得到了平均粒径约为100 nm的碳化硼纳米粉体. 与商业粉体相比, 合成的粉体具有较好的烧结活性. 在2000℃/30 MPa/1 h条件下烧结, 样品的相对密度达到97.9%(商业粉体样品为93.1%), 这可归结于合成的粉体具有细小的粒径、低的氧含量和一定程度的孪晶结构.

Boron carbide (B4C) powder was synthesized by solid state reaction of hexagonal boron nitride with carbon black (or graphite). The phase assemblages of synthesized powders were influenced by carbon source, atmosphere and temperature. Boron carbide powder with an average particle size of about 100 nm was obtained using carbon black as the carbon source at 1900℃ for 5 h in vacuum. The relative density of the sintered sample (2000℃/30 MPa/1 h) derived from the synthesized powder reached 97.9%, while that prepared from the commercial powder was 93.1%. The better sinterability of the synthesized powder than the commercial one can be attributed to the finer particle size, lower oxygen content and the twin structure of the powder.

参考文献

[1]
[2]
[3]	Thé

上一张下一张

计量

下载量()
访问量()

作者相关

文章评分

您的评分：
1

0%
2

0%
3

0%
4

0%
5

0%

材料期刊网