Affiliation:
1. Key Laboratory of Rare Earth Optoelectronic Materials and Devices of Zhejiang Province China Jiliang University Hangzhou China
2. State Key Laboratory of Luminescent Material and Devices South China University of Technology Guangzhou China
3. Hunan Kela Materials Co., Ltd. Changsha China
Abstract
AbstractAs an environment‐friendly powder with good coloring performance, rare earth sulfide is one kind of the important choices to replace cadmium and lead colorants. In particular, γ‐Ce2S3 belongs to rare earth sesquisulfide, which has a bright red color. However, the uncoated γ‐Ce2S3 is easy to decompose and release H2S in a humid or acidic environment, and its air thermal stability is limited to 350°C. In this work, γ‐Ce2S3 powders coated with zinc oxide were prepared by heterogeneous precipitation method, and a dense protective layer was formed by ZnO to improve chemical and thermal stability. Moreover, silicon dioxide was deposited on the surface of the zinc oxide coating using the microemulsion process to strengthen the powder's acid resistance. The double shells structure greatly promoted thermal stability and acid resistance of γ‐Ce2S3 powders. The results showed that rare earth sulfide powders with double shells have good stability for coloring applications.
Funder
Fundamental Research Funds for the Provincial Universities of Zhejiang
Subject
Materials Chemistry,Ceramics and Composites