According to market demand,HBT R & D department successfully developed rare earth yellow pigment of samarium sulfide in 2022.

Samarium sulfide is a kind environmental protection high-performance inorganic pigment, bright, strong coverage, environmental protection and non-toxic, has good thermal stability, weather resistance, light resistance, dispersion, covering, strong coloring;It can be widely used in paint, plastic, ceramics, cosmetics, paint and other fields, especially for plastic coloring, but also can be used in paint, ink and paper and other fields.

Samarium sulfide, as a kind of rare earth deep processing product with high additional value, HBT is the first company in China to achieve production in batch, which has obvious economic benefits and greatly improves the competitiveness of China's rare earth products in the international market.

After a lots of repeated experiments, multiple groups of parallel tests, the HBT's R & D department overcame numerous technical problems, and gradually mastered and improved the production technology of samarium sulfide.

By adjusting the chemical composition and particle shape and size of samarium sulfide pigment, the color of rare earth pigment based on samarium sulfide can be improved.Samarium sulfide is γ phase and its crystal has the cubic structure of Th3P4.Because of the vacancy in the lattice, different doping agent can be added to change the color of the pigment.The tinting power, dispersity, chemical stability and heat resistance of samarium sulfide pigment can be improved by mixing one or more alkali metals or alkaline earth metals as doping agent into the crystal lattice and coating with transparent oxides (especially SiO2 coating).Our company uses Li as the doping agent (the chemical formula of Samarium sulfide is Li0.5SM2.5S4 after lithium mixing), and uses ZnO and SiO2 composite coating. The modified Sm2S3 has better performance. After samarium sulfide coating sio2-zno composite film, the heat resistance and acid resistance are significantly improved.

The R & D department should learn to actively report and communicate in the process of completing the r & D task and be good at actively discovering, analyzing, summarizing and solving problems.The successful research and development of samarium sulfide has added a new color to the company's product range.