Facile preparation of ZrCO composite aerogel with high specific surface area and low thermal conductivity

被引:24
作者
Cui, Sheng [1 ,2 ]
Suo, Hao [1 ,2 ]
Jing, Feng [1 ,2 ]
Yu, Shuwen [1 ,2 ]
Xue, Jun [1 ]
Shen, Xiaodong [1 ,2 ]
Lin, Benlan [1 ]
Jiang, Shengjun [1 ,2 ]
Liu, Yu [3 ]
机构
[1] Nanjing Tech Univ, Dept Mat Sci & Engn, Nanjing 210009, Peoples R China
[2] Nanjing Tech Univ, Jiangsu Collaborat Innovat Ctr Adv Inorgan Funct, Nanjing 210009, Peoples R China
[3] CAEP, Inst Chem Mat, Mianyang 621900, Peoples R China
关键词
Sol-gel; ZrCO aerogel; nanomaterials; specific surface area; thermal conductivity; CARBOTHERMAL REDUCTION; ZIRCONIUM CARBIDE; ALUMINA AEROGELS; HIGH-STRENGTH; ABLATION; POLYCONDENSATION; NANOPARTICLES; RESORCINOL; STABILITY;
D O I
10.1007/s10971-018-4638-6
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
A novel ZrCO composite aerogel is synthesized using zirconium oxychloride and resorcinol-formaldehyde (RF) as precursors through the sol-gel route and carbothermal reduction process. The effects of different Zr/R molar ratios and calcination temperatures on the physical chemistry properties of ZrCO aerogels are investigated. The ZrCO composite aerogel consists of the C/ZrO2/ZrC ternary aerogel. The results show that with the increase of R/Zr molar ratios, the specific surface area and bulk density increase with calcination temperature up to 1300 A degrees C, but decrease at even temperature (1500 A degrees C). The specific surface area is as high as 637.4 m(2)/g for ZrCO composite aerogel (R:Zr = 2:1), which was higher than ever reported. As the heat-treatment temperature increases to 1500 A degrees C, the ZrC crystalline phase occurs and the t-ZrO2 phase still appears within the composite. The thermal conductivity of the carbon fiber mat-reinforced composite aerogel is as low as 0.057 W/m/K at room temperature (25 A degrees C). [GRAPHICS] .
引用
收藏
页码:383 / 390
页数:8
相关论文
共 35 条
[31]   Thermal stability of ZrO2-SiO2 aerogel modified by Fe(III) ion [J].
Xiong, Rui ;
Li, Xiaolei ;
Ji, Huiming ;
Sun, Xiaohong ;
He, Jian .
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY, 2014, 72 (03) :496-501
[32]   Preparation and characterization of ZrCO/C composite aerogels [J].
Ye, Li ;
Qiu, Wenfeng ;
Li, Hao ;
Zhao, Aijun ;
Cai, Tao ;
Zhao, Tong .
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY, 2013, 65 (02) :150-159
[33]   Mechanically reinforced composite aerogel blocks by self-growing nanofibers [J].
Yi, Xibin ;
Zhang, Linlin ;
Wang, Fengyun ;
Shen, Xiaodong ;
Cui, Sheng ;
Zhang, Jing ;
Wang, Xiuchun .
RSC ADVANCES, 2014, 4 (89) :48601-48605
[34]   Synthesis of monolithic zirconia aerogel via a nitric acid assisted epoxide addition method [J].
Zhong, Liang ;
Chen, Xiaohong ;
Song, Huaihe ;
Guo, Kang ;
Hu, Zijun .
RSC ADVANCES, 2014, 4 (60) :31666-31671
[35]   Highly thermally stable zirconia/silica composite aerogels prepared by supercritical deposition [J].
Zu, Guoqing ;
Shen, Jun ;
Zou, Liping ;
Zou, Wenbing ;
Guan, Dayong ;
Wu, Yu ;
Zhang, Yewen .
MICROPOROUS AND MESOPOROUS MATERIALS, 2017, 238 :90-96