文献类型：期刊文献

英文题名：Effect of Si3N4 on chemical durability of chalcogenide glass

作者：Chen, Guorong[1]; Cheng, Jijian[1]; Chen, Wei[1]

机构：[1]E CHINA UNIV SCI & TECHNOL,DEPT INORGAN MAT,SHANGHAI 200237,PEOPLES R CHINA

年份：1997

卷号：220

期号：2-3

起止页码：249

外文期刊名：JOURNAL OF NON-CRYSTALLINE SOLIDS

收录：;EI(收录号：1998073969990);WOS:【SCI-EXPANDED(收录号:WOS:A1997YH74700018)】；

语种：英文

外文关键词：Caustic soda - Composition effects - Doping (additives) - Hydrochloric acid - Infrared spectroscopy - Scanning electron microscopy - Silicon nitride - Sulfuric acid - Surface structure

摘要：Chemical durability of the Si3N4 doped (up to 0.5 wt%) chalconitride glasses was evaluated by weight losses of glass samples after immersion in deionized water, H2SO4, HCl and NaOH solutions. IR spectra and SEM were used as an aid to examine the surface structure of corroded glass samples. Weight loss measurements showed a poorer stability of non-oxide glasses in basic solution than in acid solution, and the Si3N4 doping was found to improve chemical durability. Comparison of IR spectra of samples exposed to the basic solution with their original ones suggested the higher content of OH-in its reaction layers, indicating that the corrosion of the present non-oxide glasses in the basic solution may result from the breakdown of the bridging Se due to an attack launched by OH-. The SEM evidence confirmed that Si3N4 doping did hinder the OH-attacks on Ge and/or As, which is most likely related to incorporation of the three-coordinated N into the glass network, as supported by a comparison of the IR transmitting spectrum between uncorroded chalconitride glass and undoped chalcogenide glass. (C) 1997 Elsevier Science B.V.