采用传统的熔融法制得了含P_2O_5的硅酸盐乳浊玻璃,利用XRD、SEM和EDS等手段研究了玻璃乳浊机理和微观结构,并且讨论了Al_2O_3和B_2O_3相对含量对显微结构和热膨胀系数的影响.结果表明:采用P_2O_5为乳浊剂,可以得到乳浊效果明显的硅酸盐系统乳浊玻璃,玻璃的乳浊是由亚稳分相的不稳分解造成的;用3wt% B_2O_3取代Al_2O_3后,玻璃试样析出少量晶体,第二相颗粒的尺寸变得不均匀,热膨胀系数变大.
Phosphorus-containing silicate opal glasses were prepared by means of conventional melt quenching technology, and opaque mechanism and microstructure of the glasses were investigated by XRD,SEM and EDS methods.The influence of R_2O_3(R=Al or B) content on the microstructure and the thermal expansion coefficient was investigated. The results show that heavy opaque glasses are obtained due to the addition of P_2O_5, and this is results from unstable disassemble phase separation; with substituting 3wt%B_2O_3 for Al_2O_3, traces of unknown crystals are precipitated and particles size becomes inhomogenous, and thermal expansion coefficient increases greatly.
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