摘要
在低温惰性条件下合成的钾膨胀石墨层间化合物 (K_EGICS)的电学性能与膨胀石墨的电学性能完全相反 ,随着温度的升高 ,K_EGICS 的电阻率逐渐升高 ,电导率逐渐降低。这一现象是由客体材料钾自身的结构及其与膨胀石墨化合时的键性决定的。
This paper has described a method for synthesizing the potassium-expanded graphite intercalation compounds (K-EGIC S), and discussed the electronic characteristics of expanded graphite and K-EGIC S. It is found that electrical conductivity of K-EGIC S gets smaller with the rising temperature (the electric conductivity decreases from 5.05×101S·cm -1 to 2.35×101 S·cm -1 when temperature rises from 77 K to 577 K), together with the elevation of graphite’s EC (the electric conductivity goes up from 2.48×102 S·cm -1 to 5.769×102 S·cm -1). The probable reasons for differences between expanded graphite and K-EGIC S are also investigated.
出处
《岩石矿物学杂志》
CAS
CSCD
北大核心
2001年第2期167-170,共4页
Acta Petrologica et Mineralogica
基金
国家自然科学基金资助项目! (5 95 72 0 2 2 )
关键词
钾膨胀石墨
层间化合物
电阻率
电导率
温度
expanded graphite
potassium-expanded graphite intercalation compounds (K-EGIC S)
resistivity
conductivity
