类石墨层状硼碳化合物的导电和抗氧化性能的研究  

Electrical property and oxidation behavior of graphite-like BC_3 compound

作　　者：胡前库[1] 吴庆华[1] 罗晓光[1] 孙广[1] 何巨龙[1] 

机构地区：[1]燕山大学亚稳材料制备技术与科学国家重点实验室

出　　处：《功能材料》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)

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.

关 键 词：层状硼碳化合物 电阻率 高温高压 抗氧化 

分 类 号：O621.25[理学—有机化学]