Effects of CaO additions on the structure and dielectric properties of aluminoborosilicate glasses

摘要：

　　Glasses with compositions xCaO-(60-x)SiO2-5MgO-15Al2O3-20B2O3 (x=0,3,6 and 9 mol %) were prepared by conventional melting method.Fourier-transform infrared spectroscopy (FTIR) indicated that the addition of CaO converted trigonal boron (3B) to tetrahedral boron (4B).The glass transition temperatures (Tg) were determined using a differential scanning calorimetry (DSC).Tg increased with increasing CaO content.Thus,the addition of CaO instead of SiO2 strengthened the glass network.The dielectric εr and loss tang were measured for the MgO-B2O3-Al2O3-SiO2 glass system in the frequency range 103-105 Hz.The decrease in εr and tanδ could be attributed to the increase in the rigidity of the glass network.

关键词： Aluminoborosilicates Structure Glass transition temperature Dielectric properties

作者: X.M.Yuan S.M.Lu X.H.Zhang Y.J.Cui H.T.Wu Y.L.Yue

作者单位: School of Materials Science and Engineering, Shandong Provincial Key Laboratory of Preparation and Measurement of Building Materials, University of Jinan, Jinan 250022, China

会议类型: 国际会议

会议名称: 2nd International Conference on Polymer Composities and Polymer Testing (2013第二届高分子复合材料与高分子测试国际会议暨先进工业技术与方案国际会议)(ISPCPT2013)

会议地点: 太原

会议语种:英文

页码: 273-277

在线出版日期: 2013-03-22（万方平台首次上网日期，不代表论文的发表时间）