(武漢工業(yè)大學(xué) 材料復(fù)合新技術(shù)國(guó)家重點(diǎn)實(shí)驗(yàn)室, 武漢 430070)
摘 要: 根據(jù)固體與分子經(jīng)驗(yàn)電子理論, 通過(guò)鍵距差(BLD)方法, 對(duì)ZrC, ZrN和ZrB2相的價(jià)電子結(jié)構(gòu)進(jìn)行了計(jì)算: ZrC, ZrN, ZrB2晶體中最強(qiáng)鍵上的共價(jià)數(shù) nA 和鍵能 E 的大小與硬度、熔點(diǎn)的高低是一致的, 而ZrB2具有強(qiáng)的層間結(jié)合是因Zr—B鍵仍具有一定的共價(jià)電子數(shù)及獨(dú)特鍵絡(luò)特征的結(jié)果。
關(guān)鍵字: ZrC, ZrN, ZrB2; 價(jià)電子結(jié)構(gòu); 性能
(State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, P.R.China)
Abstract:According to solid and molecular empirical electron theory the valenceelectron structure of ZrC, ZrN and ZrB2 phases are calculated by bond length difference(BLD) method. Themagnitude of the covalent number nA on the strongest chemical bond in ZrC, ZrN and ZrB2 crystals and chemical bond energy E are in agreement with that ofthe hardness and melting point. ZrB2 has strong atom layer due to certain covalence electron number on Zr—B bond and special bond net feature.
Key words: ZrC, ZrN, ZrB2; valence electron structure; property


