|本期目录/Table of Contents|

[1]张凤云,姜勇刚,冯军宗,等.水泥含量对气相Al2O3粉末基隔热复合材料性能的影响[J].南京工业大学学报(自然科学版),2020,42(04):500-507.[doi:10.3969/j.issn.1671-7627.2020.04.008]
 ZHANG Fengyun,JIANG Yonggang,FENG Junzong,et al.Effects of cement content on the properties of fumed alumina powder based thermal insulation composites[J].Journal of NANJING TECH UNIVERSITY(NATURAL SCIENCE EDITION),2020,42(04):500-507.[doi:10.3969/j.issn.1671-7627.2020.04.008]
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水泥含量对气相Al2O3粉末基隔热复合材料性能的影响()
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《南京工业大学学报(自然科学版)》[ISSN:1671-7627/CN:32-1670/N]

卷:
42
期数:
2020年04期
页码:
500-507
栏目:
出版日期:
2020-07-17

文章信息/Info

Title:
Effects of cement content on the properties of fumed alumina powder based thermal insulation composites
文章编号:
1671-7627(2020)04-0500-08
作者:
张凤云姜勇刚冯军宗李良军冯坚
国防科技大学 空天科学学院 新型陶瓷纤维及其复合材料重点实验室,湖南 长沙 410073
Author(s):
ZHANG Fengyun JIANG Yonggang FENG Junzong LI Liangjun FENG Jian
Science and Technology on Advanced Ceramic Fibers and Composites Laboratory, College of Aerospace Science and Engineering, National University of Defense Technology, Changsha 410073, China
关键词:
铝酸盐水泥 Al2O3粉末 隔热材料 耐温性
Keywords:
aluminate cement fumed alumina powder thermal insulation material high temperature resistance
分类号:
TB332
DOI:
10.3969/j.issn.1671-7627.2020.04.008
文献标志码:
A
摘要:
以气相Al2O3粉末为基体,短切莫来石纤维为增强相,铝酸盐水泥为黏结剂,α-SiC粉末为遮光剂,聚醚P84为表面活性剂,采用简单的浇筑成型工艺制备低热导率和较好力学性能的气相Al2O3粉末基隔热复合材料,并研究水泥用量对复合材料性能的影响规律。结果表明:各组分在复合材料内部分布均匀; 随着水泥用量增加,复合材料密度增加,干燥收缩率减小,压缩强度和热导率逐渐增加,耐温性提高。当水泥用量是莫来石纤维质量的55%时,复合材料密度为0.581 g/cm3,压缩强度为0.23和0.41 MPa(3%和10%形变),1 100 ℃热导率为0.096 W/(m·K),经1 200 ℃马弗炉中热处理30 min后的直径和厚度方向线性收缩率分别为0.10%和2.55%,是一种综合性能较好的隔热复合材料。
Abstract:
A new kind of fumed alumina powder based thermal insulation composite was fabricated by a facile casting method with fumed alumina powder as matrix, short mullite fiber as reinforcement, aluminate cement as binder, α-SiC powder as opacifier and Pluronic P84 as surfactant. The composite had low thermal conductivity and high compression strength. Moreover, the influence of cement content on the properties of the composite was investigated. Results showed that the components were evenly distributed in the composites. With the increase of cement content, the density of composites increased, the shrinkage rate decreased, the compression strength and the thermal conductivity gradually increased, and the high temperature resistance improved. When the amount of cement was 55% of the mass of mullite fiber, the density was 0.581 g/cm3, compression strength with 3% and 10% strain was 0.23 and 0.41 MPa, thermal conductivity was 0.096 W/(m·K)at 1 100 ℃, diameter shrinkage rate and thickness shrinkage rate were only 0.10% and 2.55% after being treated at 1 200 ℃ for 30 min, and it was a kind of thermal insulation composite with good comprehensive performance.

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备注/Memo

备注/Memo:
收稿日期:2019-10-28
基金项目:湖南省自然科学基金面上项目(2018JJ2469)
作者简介:张凤云(1996—),女,E-mail:zhangfengyun17@163.com; 姜勇刚(联系人),副研究员,E-mail:jygemail@nudt.edu.cn.
引用格式:张凤云,姜勇刚,冯军宗,等.水泥含量对气相Al2O3粉末基隔热复合材料性能的影响[J].南京工业大学学报(自然科学版),2020,42(4):500-507.
ZHANG Fengyun, JIANG Yonggang, FENG Junzong, et al. Effects of cement content on the properties of fumed alumina powder based thermal insulation composites[J].Journal of Nanjing Tech University(Natural Science Edition),2020,42(4):500-507..
更新日期/Last Update: 2020-07-30