Sol-gel synthesis of macro-mesoporous Al2O3-SiO2-TiO2 monoliths via phase separation route

被引：19
作者：
Sun, Mingliang [1 ]
Zhao, Tianbo [1 ]
Li, Zunfeng [1 ]
Ma, Zhaofei [1 ]
Wang, Jia [1 ]
Li, Fengyan [2 ]
机构：
[1] Beijing Inst Technol, Minist Educ, Key Lab Cluster Sci, Beijing 100081, Peoples R China
[2] Beijing Inst Petrochem Technol, Dept Appl Chem, Beijing 102617, Peoples R China
来源：
CERAMICS INTERNATIONAL | 2016年 / 42卷 / 14期
基金：
中国国家自然科学基金;
关键词：
Al2O3-SiO2-TiO2; Monoliths; Sol-gel; Phase separation; Porosity; WELL-DEFINED MACROPORES; MESOSTRUCTURED SKELETONS; HIERARCHICAL POROSITY; ALUMINUM TITANATE; SILICA MONOLITH; PORE STRUCTURE; PERFORMANCE; CRACKING;
D O I：
10.1016/j.ceramint.2016.07.068
中图分类号：
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Monolithic Al2O3-SiO2-TiO2 with multiscale porous structures has been prepared via a sol-gel process accompanied by phase separation. Poly(ethylene oxide) (PEO) is used to induce the phase separation and formamide (FA) to control the gelation of ternary system. The dried gel is amorphous. After heat treatment at 1050 degrees C, the gel transforms into the phase Al4Ti2SiO12. The interconnected macropores are well maintained and the meso-/micropores are disappeared. The homogeneous dispersion of Al, Si and Ti in the skeleton indicates that sol-gel technique could provide a very feasible way for the preparation of hierarchical monolithic composite materials. (C) 2016 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
引用
收藏
页码：15926 / 15932
页数：7
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