(中南大學 材料科學與工程學院，長沙 410083)
摘 要: 在氮氣保護下，在1 550~1 650 ℃的硅鉬電阻爐中熔融2 h制備Y-Ca-Si-Al-O-N系氧氮玻璃。采用X射線衍射分析確定玻璃樣品的無定形態(tài)本質(zhì)。利用傅里葉變換紅外光譜分析了玻璃的基本結(jié)構(gòu)單元。研究了N/O比和Y/Ca比(平衡濃度比，%)對氧氮玻璃的密度、玻璃轉(zhuǎn)變溫度(tg)、熱膨脹系數(shù)(α)、析晶峰溫度(tc)、化學穩(wěn)定性(腐蝕率)和維氏顯微硬度的影響。結(jié)果發(fā)現(xiàn)，玻璃的物理性能分別隨氮含量或釔含量的變化呈近似線性關系。制備的氧氮玻璃綜合性能較好，有可能應用于透明裝甲的硬質(zhì)面板材料。
關鍵字: 氧氮玻璃；紅外光譜；熱性能；玻璃結(jié)構(gòu)；顯微硬度
（School of Materials Science and Engineering, Central South University, Changsha 410083, China）
Abstract:Y-Ca-Si-Al-O-N oxynitride glasses were prepared by melting batches at 1 550-1 650 ℃ for 2 h under N2 atmosphere in a Si-Mo-heated resistance furnace. The amorphous nature of the samples was verified by an X-ray diffractometer. Fourier-transform IR spectroscopy was done to find out the basic structural units in these glasses. The influences of N/O ratio (eq.%) and Y/Ca ratio (eq.%) on the properties such as density, glass transition temperature (tg), thermal expansion coefficients, the crystallization temperature (tc), chemical durability(leaching rate) and Vickers hardness (HV) were investigated. The results show that the physical properties exhibit approximately linear relationship with the nitrogen content or yttrium content, respectively. The oxynitride glasses obtained with good comprehensive property may be used for hard front plate materials of transparent armour.
Key words: oxynitride glass; IR spectra; thermal properties; glass structure; micro hardness
