Raman spectroscopic study on structure and phase transition of zirconium tungstate synthesized with a CO2 laser

2nd International Conference on New Material and Chemical Industry

材料科学;化学工业

Wang, J.P.^1 ; Chen, Q.D.^1

Faculty of Aerospace Engineering, Binzhou University, Binzhou

256603, China^1

关键词: Cubic structure;    Laser scan speed;    Negative thermal expansion material;    Orthorhombic structures;    Raman spectroscopic;    Raman spectroscopic study;    Smooth surface;    Zirconium tungstate;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/292/1/012089/pdf
DOI  :  10.1088/1757-899X/292/1/012089

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

Negative thermal expansion material of ZrW2O8has been successfully synthesized by rapid solidification with a CO2laser. The materials solidified in densely packed blocks with both smooth surface and dark green color. Raman spectroscopic and XRD analysis reveal that the samples solidified in an orthorhombic structure. It is analyzed that the compressive stress can be effectively reduced by lowering the laser scan speed. ZrW2O8samples with cubic structure were produced when the laser scan speed was less than 2mm/s. The samples cooled by water are mainly dominated by α phase which demonstrates that a phase transition from γ to α has occurred after annealing.