An ultralight silica-modified ZrO2-SiO2 aerogel composite with ultra-low thermal conductivity and enhanced mechanical strength

被引：73

作者：

Hou, Xianbo ^{[1
]}

Zhang, Rubing ^{[1
]}

Fang, Daining ^{[2
]}

机构：

[1] Beijing Jiaotong Univ, Sch Civil Engn, Beijing 100044, Peoples R China

[2] Beijing Inst Technol, Inst Adv Struct Technol, Beijing 100081, Peoples R China

来源：

SCRIPTA MATERIALIA | 2018年 / 143卷

基金：

中国国家自然科学基金;

关键词：

Aerogel composites; ZrO2; fiber; Mechanical properties; Thermal properties; FIBROUS CERAMICS; ARAMID FIBERS; HEAT-TRANSFER; BEHAVIOR; TOUGHNESS;

D O I：

10.1016/j.scriptamat.2017.09.028

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

A novel, ultralight, ZrO2-fiber-reinforced ZrO2-SiO2 aerogel composite with superior thermal and mechanical properties is fabricated via a rapid gelation method. Pure ZrO2-SiO2 aerogel is modified by silica to effectively strengthen its nanostructure. The results demonstrate that the fabricated fiber-reinforced aerogel composites with ZrO2-fiber contents ranging from 0 to 15 wt% exhibit ultra-low densities (0.16-033 g/cm(3)), low thermal conductivities (0.0235-0.0296 Wm(-1) K-1), and high compressive strengths (0.36-0.82 MPa). The present study provides an efficient method to prepare light aerogel composites with low thermal conductivity and high mechanical strength, which can be used as superior heat-insulators in aerospace applications. (C) 2017 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：113 / 116

页数：4

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