硅酸盐通报2024，Vol.43Issue(10)：3843-3851,9.
CuO对堇青石微晶玻璃析晶行为及微波介电性能的影响
Effect of CuO on Crystallization Behavior and Microwave Dielectric Properties of Cordierite Glass-Ceramics
摘要
Abstract
The xCuO-(22.2-x)MgO-22.2Al2O3-55.6SiO2(x=0,0.25,0.50,0.75 and 1.00,molar fraction)(MAS)glass-ceramics were synthesized using sintering-crystallization method.The effect of CuO content on the crystallization behavior,crystal type,micromorphology and microwave dielectric properties of MAS glass-ceramics was studied.The results show that as the CuO content increases from 0％to 1.00％,substituting for MgO,the glass transition temperature decreases.Additionally,the precipitation peak temperatures also show a decreasing trend,while the Avrami index n gradually increases.The primary crystalline phase in glass-ceramics is α-cordierite.The inclusion of CuO facilitates the transformation of μ-cordierite to α-cordierite at lower temperatures and reduces the thermal expansion coefficient.With the increase of CuO content,the dielectric constant of glass-ceramics increases first and then decreases,while the dielectric loss decreases first and then increases.At a heat treatment 650 ℃/2 h+1 050 ℃/2 h,the glass-ceramics doped with 0.25％and 0.50％CuO exhibits optimal integrated dielectric properties,which dielectric constant is 5.04 and 5.07,dielectric loss is 7.49 ×10-4 and 7.12×10-4,and quality factor is 20 013.35 and 20 786.41 GHz within the frequency range of 14.6～15.2 GHz.关键词
堇青石微晶玻璃/CuO/烧结-析晶法/微波介电性能/析晶动力学Key words
cordierite glass-ceramics/CuO/sintering-crystallization method/microwave dielectric property/crystallization kinetic分类
化学化工引用本文复制引用
张杰,陈巧,刘佳,李路瑶,王静,韩建军..CuO对堇青石微晶玻璃析晶行为及微波介电性能的影响[J].硅酸盐通报,2024,43(10):3843-3851,9.基金项目
光纤光缆先进制造与应用技术全国重点实验室(长飞公司)开放课题(SKLD2207) （长飞公司）
