Determining the boundary conditions governing phase separation processes of borate-glass systems

确定控制硼酸盐玻璃系统相分离过程的边界条件

• 批准号: 405941288
• 负责人: Dr. Sharon Koppka
• 金额: --
• 依托单位: Institut für Technische Chemie
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2018
• 资助国家: 德国
• 起止时间: 2017-12-31 至 2022-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/405941288?language=en
• 关键词: Determining; boundary; conditions; governing; phase

Immiscibility in borate glasses is a common phenomenon. A series of experimental studies have been carried out, where sodium borate glasses were enriched with metal oxides (non-silica). In the case of Na20-B2O3-Y203-Zr02 glasses, a porous glass was obtained after heat treatment and selective leaching. To our present knowledge no systematic investigations of the rather complex microstructure forming processes in metal oxide containing borate glasses to produce porous glasses have been carried out.This especially include ZrO2 or/and CeO2 containing sodiumborate glasses. To this end, two ternary systems (ZrO2-Na2O-B2O3, CeO2-Na2O-B2O3) and one quaternary system (ZrO2-CeO2-Na2O-B2O3) are under investigation. The studies focus on three main topics: Determination of the Impact of glass composition on thermal and physical properties, fundamental research on phase separation processes and the investigation of the impact of leaching conditions to synthesize porous glasses with different compositions. The goal of this project is to gain a deeper understanding of the microstructure forming processes in borate glasses to obtain “new” porous glasses consisting of high amounts of metal oxides. These porous glasses have the potential to develop a new kind of porous glass ceramics: the controlled porous glass ceramics.

硼酸盐玻璃中的不溶现象是一种普遍现象。已经进行了一系列实验研究，其中硼酸钠玻璃富含金属氧化物（非二氧化硅）。在Na 20-B2 〇 3-Y2 〇 3-Zr 〇 2玻璃的情况下，在热处理和选择性浸出之后获得多孔玻璃。就我们目前所知，还没有对在含金属氧化物的硼酸盐玻璃中形成相当复杂的微结构以制备多孔玻璃的过程进行系统的研究，这尤其包括含ZrO 2或/和CeO 2的钠硼酸盐玻璃。为此，两个三元系统（ZrO_2-Na_2 O-B_2 O_3，CeO_2-Na_2 O-B_2 O_3）和一个四元系统（ZrO_2-CeO_2-Na_2 O-B_2 O_3）正在研究中。研究重点集中在三个主要主题：确定玻璃组成对热性能和物理性能的影响、相分离过程的基础研究以及研究浸出条件对合成不同组成的多孔玻璃的影响。该项目的目标是更深入地了解硼酸盐玻璃的微观结构形成过程，以获得由高含量金属氧化物组成的“新”多孔玻璃。这些多孔玻璃具有开发一种新型多孔玻璃陶瓷的潜力：可控多孔玻璃陶瓷。