Synthesis and property study on negative thermal expansion ZrW2O8 powders using the citric acid sol-gel method

被引：0

作者：

Sun, Xiu-Juan ^{[1
,2
]}

Cheng, Xiao-Nong ^{[2
]}

Yang, Juan ^{[2
]}

Liu, Qin-Qin ^{[2
]}

机构：

[1] Center of Analysis and Test, Jiangsu University, Zhenjiang, China

[2] School of Materials Science and Engineering, Jiangsu University, Zhenjiang, China

来源：

Gongneng Cailiao/Journal of Functional Materials | 2015年 / 46卷 / 08期

关键词：

Scanning electron microscopy - Negative thermal expansion - Tungsten compounds - Chelation - Powder metals - Sol-gels - Differential scanning calorimetry - Citric acid - Sol-gel process - Thermal expansion - X ray powder diffraction;

D O I：

10.3969/j.issn.1001-9731.2015.08.005

中图分类号：

学科分类号：

摘要：

Negative thermal expansion (NTE) material ZrW2O8 powders were synthesized by the sol-gel method with citric acid used as chelating agent. The precursor of ZrW2O8 was studied by thermogravimetric and differential scanning calorimetry (TG-DSC). The structure and morphology of the resulting powders were characterized by powder X-ray diffraction (XRD) and scanning electron microscopy (SEM) respectively. The results showed that the samples were single phase of α-ZrW2O8 with irregular shape. With the increasing amount of citric acid, the particles grew bigger with a slice layer shape. The High temperature X-ray diffraction measurement indicated that the material had strong NTE. From room temperature to 500, the average thermal expansion coefficient was -6.14×10-6/. ©, 2015, Journal of Functional Materials. All right reserved.

引用

页码：08023 / 08027

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