电子元件与材料2017，Vol.36Issue(2)：29-33,44,6.DOI:10.14106/j.cnki.1001-2028.2017.02.007
硼酸镧玻璃的结构和热学性能研究
Thermodynamics properties and structure of lanthanum borate glass
崔梦豪 1陈兴宇 1张为军1
作者信息
- 1. 国防科学技术大学 航天科学与工程学院，湖南 长沙 410073
- 折叠
摘要
Abstract
A kind of La2O3-B2O3-ZnO(LBZ)glass-ceramicswasprepared by high temperature melting technology. The differential scanningcalorimetry(DSC),infrared spectroscopy(IR)and X-ray diffraction(XRD)were utilized to analyze the glass forming region, the coordination state and the phase composition of the LBZ glasses.The effects of LBZ glass components on the thermodynamics properties,the variety of the main crystalline phases and the thermal properties were also studied. The experimental results show that:the LBZ glassisformed when the contents of La2O3,B2O3and ZnOare 0~24.4%, 34%~78%and 0~63% (mole fraction), respectively.The glass network structure is constituted with [BO3] units and [BO4] tetrahedra.The La3+locates in the gap of the network acting as network modifiers, andtheZn2+can either locate outside the network in the form of [ZnO6] or enter the network in the form of [ZnO4] acting as intermediate.Themain crystalline phases of the LBZ glasses are La(BO2)3and LaBO3after high-temperature heat treatment.The glass transition temperature is gradually elevated with the increase of La2O3and B2O3contents and the decrease of the ZnO content.The crystallization activation energy of the La-based LBZ glass is 337~397kJ/mol and it is enhanced as the content of La2O3is increased.关键词
La2O3-B2O3-ZnO/微晶玻璃/形成区间/结构/玻璃化转变温度/析晶激活能Key words
La2O3-B2O3-ZnO/glass-ceramic/forming region/structure/glass transition temperature/crystallization activation energy分类
通用工业技术引用本文复制引用
崔梦豪,陈兴宇,张为军..硼酸镧玻璃的结构和热学性能研究[J].电子元件与材料,2017,36(2):29-33,44,6.
