摘要
通过高温高压方法制备了一种晶化程度较高的类石墨层状BC3化合物。在5.5GPa压力条件下,温度越高,制得的硼碳样品晶化越好,电阻率越小。在1500℃、5.5GPa下制得的层状硼碳样品的电阻率ρ=1.2×10-4Ω.m,略大于同等条件下制备的纯碳样品的电阻率ρ=1.1×10-4Ω.m。这种层状硼碳化合物在620℃左右开始氧化,比纯碳样品的初始氧化温度高大约100℃,替代的硼明显的改善了碳的抗氧化性能。
A well-crystalline graphite-like BC3 compound has been synthesized after treating an amorphous B-C precursor at high pressure and high temperature.The four-probe bulk resistivity measurements indicate that the electrical resistivity value for the B-C sample is 1.2×10^-4Ω·m hich is slightly higher than that（1.1×10^-4Ω·m for pure carbon sample prepared at the same conditions of 5.5GPa and 1500℃.The oxidation behavior of the graphite-like BC3 compound as well as pure carbon was investigated by thermogravimetry（TG） analysis.The results indicate that the BC3 compound starts to oxidize at about 620℃,compared to about 510℃ for pure C,which reveals the inhibiting effect of substitutional boron.
出处
《功能材料》
EI
CAS
CSCD
北大核心
2007年第8期1304-1306,共3页
Journal of Functional Materials
基金
国家重点基础研究发展计划(973计划)资助项目(2005CB724400)
国家自然科学基金资助项目(10474083
50472051
50532020
50672081)
关键词
层状硼碳化合物
电阻率
高温高压
抗氧化
layered B-C compound
electrical resistivity
high temperature and high pressure
oxidation behavior
