Control of Reaction Pathways for Rapid Synthesis of Negative Thermal Expansion Ceramic Zr2P2WO12 with Uniform Microstructure. (23rd December 2013)

• Record Type: Journal Article
• Authors: Liu, Xiansheng; Wang, Junqiao; Fan, Chunzhen; Shang, Rui; Cheng, Fuxing; Yuan, Baohe; Song, Wenbo; Chen, Yongguang; Liang, Erjun; Chao, Mingju
• Is Part Of: International journal of applied ceramic technology. Volume 12(2015:May/Jun.)Supplement 2
• Page Start: E28
• Page End: E33
• Publication Date: 2013-12-23
• Subjects: Ceramics -- Periodicals; Ceramics -- Technological innovations -- Periodicals; 620.1405
• DOI: 10.1111/ijac.12201
• Languages: English
• ISSNs: 1546-542X

Abstract

Abstract : The reaction pathways to synthesize Zr2 P2 WO12 (ZPW) from ZrO2, WO3, and P2 O5 are studied. It is found that there exist two different reaction pathways: One is direct reaction, while another is through an intermediate phase ZrP2 O7 . The reaction pathways are determined by drying and sintering temperatures. By controlling the reaction pathways, namely avoiding the intermediate phase, negative thermal expansion ceramic ZPW can be synthesized within several minutes. Besides, as‐synthesized specimens possess much smaller and uniform grain size distribution than those synthesized by conventional methods. The investigation paves a way toward rapid and environmental friendly synthesis of ZPW and related compounds.