Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

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中国有色金属学报

ZHONGGUO YOUSEJINSHU XUEBAO

第16卷    第11期    总第92期    2006年11月

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文章编号: 1004-0609(2006)11-1902-06
氧化锌对MgO-Al2O3-SiO2系玻璃结构和性能的影响
陈国华

(桂林电子科技大学 材料科学与工程系, 桂林 541004)

摘 要:  采用熔融法制备不同氧化锌含量的MgO-Al2O3-SiO2系玻璃, 采用差热分析法研究氧化锌含量对MgO-Al2O3-SiO2系玻璃转变温度和晶化峰值温度的影响, 利用红外光谱技术研究氧化锌对玻璃结构的影响, 并验证玻璃的差热分析结果, 采用粉末X射线衍射分析对950 ℃烧结后的微晶玻璃样品进行晶相分析。 结果表明: 少量氧化锌的加入(w(ZnO)≤3%)能够促进玻璃粉体的烧结致密化, 过多的氧化锌将阻止样品的烧结。 样品的介电常数和膨胀系数随着氧化锌的增加而增加。 样品的介电损耗随氧化锌的增加呈先降后升的变化, 与密度的变化规律相反。

 

关键字:  氧化锌; MgO-Al2O3-SiO2体系; 玻璃结构; 性能

Effect of ZnO on structure and properties of MgO-Al2O3-SiO2 system glass
CHEN Guo-hua

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

ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK

ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW

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