Citation: WANG Zhumei, MA Zhenguo, LI Yueming, GAO Yiqun, SONG Fusheng, SHEN Zongyang, LI Zhike. Effect of Ca²⁺-Doping on Synthesis Temperature and Heat Stability of γ-Ce₂S₃[J]. Chinese Journal of Applied Chemistry, ;2019, 36(6): 683-689. doi: 10.11944/j.issn.1000-0518.2019.06.180327 shu

Effect of Ca²⁺-Doping on Synthesis Temperature and Heat Stability of γ-Ce₂S₃

China National Light Industry Key Laboratory of Functional Ceramic Materials, School of Materials Science and Engineering, Jingdezhen Ceramic Institute, Jingdezhen, Jiangxi 333403, China

Corresponding author: LI Yueming, lym6329@163.com
Received Date: 12 October 2018
Revised Date: 14 November 2018
Accepted Date: 24 December 2018

Fund Project: Supported by the National Natural Science Foundation of China(No.51462010), the Natural Science Foundation of Jiangxi Province of China(No.2017ACB20022)the Natural Science Foundation of Jiangxi Province of China 2017ACB20022the National Natural Science Foundation of China 51462010

Figures(6)

CeCl₃·7H₂O, CaCl₂·2H₂O and C₂H₂O₄·2H₂O were used as raw materials to prepare Ca²⁺-doped cerium oxalate by the coprecipitation method. The Ca²⁺-doped cerium oxalate was calcined to obtain Ca²⁺-doped cerium oxide precursor. Ca²⁺-doped γ-Ce₂S₃ was achieved by vulcanizing precursors in an Ar atmosphere using CS₂ as the sulfur source. Pigments were characterized by X-ray diffraction(XRD), energy dispersive spectrometer(EDS), color analyzer, UV-Vis spectrophotometer and thermogravimetric analysis-differential thermal analysis(TG-DTA). The results show that Ca²⁺-doping can lower the synthesis temperature and improve the thermal stability of pigments in air. When the ratio of n(Ca²⁺):n(Ce³⁺) ≥ 0.16, pure phase γ-Ce₂S₃ can be obtained by vulcanizing at 900℃ for 150 min. The synthesis temperature of doped γ-Ce₂S₃ decrease by 300℃ compared with undoped γ-Ce₂S₃. When the n(Ca²⁺):n(Ce³⁺) is 0.64, the oxidation exothermic peak of Ca²⁺-doped γ-Ce₂S₃ increases from 490.6 to 541.0 ℃.
- γ-cerium sesquisulfide,
- red pigment,
- calcium doping,
- synthesis temperature,
- stability
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Effect of Ca²⁺-Doping on Synthesis Temperature and Heat Stability of γ-Ce₂S₃