CaO取代量对MgO-Al_(2)O_(3)-SiO_(2)玻璃结构和性能的影响  

Effect of CaO substitution on the structure and properties of MgO-Al_(2)O_(3)-SiO_(2)glass

作　　者：樊振华 谢卫东[1] 韩利雄 刘伟廷 曾庆文 FAN Zhenhua;XIE Weidong;HAN Lixiong;LIU Weiting;ZENG Qingwen(College of Materials Science and Engineering,Chongqing University,Chongqing 400044,China;Chongqing Polycomp International Corporation,Chongqing 400082,China)

机构地区：[1]重庆大学材料科学与工程学院,重庆400044 [2]重庆国际复合材料股份有限公司,重庆400082

出　　处：《重庆理工大学学报（自然科学）》2022年第12期177-183,共7页Journal of Chongqing University of Technology：Natural Science

基　　金：国家先进制造业专项项目。

摘　　要：采用传统的熔融淬冷法制备MgO-Al_(2)O_(3)-SiO_(2)玻璃,研究了CaO取代MgO对玻璃结构和性能的影响。研究结果表明:适量的氧化钙代替氧化镁后,会出现混合碱土效应,玻璃网络中的桥氧含量达到最大值,提高了玻璃网络结构的稳定性。随着CaO的取代,密度、介电常数线性增大,弹性模量线性减小。但热稳定性和热膨胀系数均表现出混合碱土效应。热稳定性参数S呈现先增加后降低的趋势,热膨胀系数则表现出明显的非线性变化。当CaO含量为5%时,玻璃表现出最好的综合性能,其热稳定参数S、热膨胀系数、弹性模量、介电常数分别为37.6 K、3.44×10^(-6)/K、94 GPa、5.6。研究结果对5G时代印刷电路板用玻璃纤维的性能控制具有指导意义。BaO-TiO_(2)-SiO_(2)high dielectric glass is produced by traditional melt quenching and cooling method.This paper studies the effect of CaO replacing MgO on the structure and properties of glass.The results show that,when an appropriate amount of calcium oxide replaces magnesium oxide,mixed alkaline earth effect appears,and the bridge oxygen content in the glass network reaches the maximum,which improves the stability of the glass network structure.With the substitution of CaO,density and dielectric constant increase linearly and elastic modulus decreases linearly.However,both thermal stability and thermal expansion coefficient show mixed alkaline earth effect.Thermal stability parameter S increases first and then decreases,and thermal expansion coefficient shows an obvious nonlinear change.When the CaO content is 5%,the glass shows the best comprehensive performance,and its thermal stability parameter S,thermal expansion coefficient,elastic modulus and dielectric constant are 37.6 K,3.44×10^(-6)/K,94 GPa and 5.6 respectively.The research results have a significant guidance for the performance control of glass fiber for printed circuit boards in 5G era.

关 键 词：印刷电路板 混合碱土效应 结构 性能 玻璃纤维 

分 类 号：TQ171.77[化学工程—玻璃工业]