(桂林電子科技大學 材料科學與工程系， 桂林 541004)
摘 要: 采用熔融法制備不同氧化鋅含量的MgO-Al2O3-SiO2系玻璃， 采用差熱分析法研究氧化鋅含量對MgO-Al2O3-SiO2系玻璃轉變溫度和晶化峰值溫度的影響， 利用紅外光譜技術研究氧化鋅對玻璃結構的影響， 并驗證玻璃的差熱分析結果， 采用粉末X射線衍射分析對950 ℃燒結后的微晶玻璃樣品進行晶相分析。 結果表明： 少量氧化鋅的加入(w(ZnO)≤3％)能夠促進玻璃粉體的燒結致密化， 過多的氧化鋅將阻止樣品的燒結。 樣品的介電常數和膨脹系數隨著氧化鋅的增加而增加。 樣品的介電損耗隨氧化鋅的增加呈先降后升的變化， 與密度的變化規(guī)律相反。
關鍵字: 氧化鋅； MgO-Al2O3-SiO2體系； 玻璃結構； 性能
（Department of Information Materials Science and Engineering,
Guilin University of Electronic Technology, Guilin 541004, China）
Abstract: The glasses of MgO-Al2O3-SiO2 system were prepared by quenching method. The effects of ZnO content on glass transition and crystallization temperature of the MgO-Al2O3-SiO2 system were investigated by differential thermal analysis (DTA). The effect of ZnO content on the glass structure was studied by FTIR spectra technology. The phase compositions of glass samples with different contents of ZnO sintered at 950 ℃ were determined by X-ray diffraction (XRD). The results show that the addition of small amount of ZnO (w(ZnO)≤3%) obviously improves the sintering densification of samples, but more ZnO addition inhibits the sintering. The dielectric constant and thermal expansion coefficient of samples increase with the increase of ZnO content. The dielectric loss of samples initially decreases and then increases with ZnO content increasing, which is in opposition to that of the relative density.
Key words: zinc oxide; MgO-Al2O3-SiO2 system; glass structure; properties
