Sol gel synthesis of macroporous barium zirconate monoliths from ionic precursors via a phase separation route

被引：13

作者：

Guo, Xingzhong ^{[1
]}

Wang, Zichen ^{[1
]}

Song, Jie ^{[1
]}

Yang, Hui ^{[1
]}

机构：

[1] Zhejiang Univ, Sch Mat Sci & Engn, Hangzhou 310027, Zhejiang, Peoples R China

来源：

JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS | 2017年 / 102卷

基金：

中国国家自然科学基金;

关键词：

Barium zirconate; Porous monolith; Sol-gel; Phase separation; WELL-DEFINED MACROPORES; FE-DOPED BAZRO3; MESOSTRUCTURED SKELETONS; OXYGEN VACANCIES; PORE STRUCTURE; SILICA; STABILITY; OXIDE;

D O I：

10.1016/j.jpcs.2016.11.012

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Monolithic macroporous barium zirconate derived from ionic precursors has been successfully prepared via a phase separation route in the presence of poly(ethylene oxide) (PEO) and propyleneoxide (PO). Poly(ethylene oxide) (PEO) acts as a phase separation inducer, while propyleneoxide (PO) acts as a gelation accelerant in the sol gel process. Appropriate choice of poly(ethylene oxide) (PEO) and propyleneoxide (PO) allows the production of continuous macroporous monolithic gel with a porosity of ca. 63% and a macropore size of 1.8 mu m Some BaCl2 recrystallizes in the dried gel, and subsequently tetragonal ZrO2 phase precipitates after heat-treated at 800 degrees C. The crystalline phase barium zirconate forms after heat treatment at 1100 degrees C in air, while the macroporous structure is preserved with a slight increase of porosity and a decrease of macropore size.

引用

页码：105 / 109

页数：5

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