【摘 要】
：
A new niobate Sr_6Ti_7Nb_9O_(42) was synthesized for the first time by solid state reaction in SrO-TiO_2Nb_2O_5 ternary system. The new compound was characteriz
【出 处】
：
Journal of Wuhan University of Technology-Materials Science
论文部分内容阅读
A new niobate Sr_6Ti_7Nb_9O_(42) was synthesized for the first time by solid state reaction in SrO-TiO_2Nb_2O_5 ternary system. The new compound was characterized by EPMA, XRD, SEM and DTA. The X-ray owder diffraction data of Sr_6Ti_7Nb_9O_(42) were firstly reported in the paper. Sr_6Ti_7Nb_9O_(42) crystallizes the hexagonal system with unit cell parameters a=8.9991(4)(?), c=11.5118(9)(?), and space group P6_3/mcm(193), z=1. The calculated and measured densities are 4.783 g/cm~3 and 4.764 g/cm~3, respectively.
A new niobate Sr_6Ti_7Nb_9O_ (42) was synthesized for the first time by solid state reaction in SrO-TiO_2Nb_2O_5 ternary system. The new compound was characterized by EPMA, XRD, SEM and DTA. The X-ray owder diffraction data of Sr_6Ti_7Nb_9O_ (42) were primarily reported in the paper. Sr_6Ti_7Nb_9O_ (42) crystallizes the hexagonal system with unit cell parameters a = 8.9991 (4) ?, c = 11.5118 ?, and space group P6_3 / mcm = 1. The calculated and measured densities are 4.783 g / cm ~ 3 and 4.764 g / cm ~ 3, respectively.
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