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The synthesis and dielectric properties of calcium titanate (CaTiO_3) submicron powder synthesized by mechanical ball-milling method have been investigated in this paper.With the ball-milling time increased,the size of CaTiO_3 particles decreased from micron to submicron,and a great deal of nanoparticles (50-100 nm) occurred.The CaTiO_3 ceramics made from submicron powders achieved compact structure at the sintering temperature of 1250℃,and had good dielectric properties:ε_r=171,Q×f=4361 GHz,τ_(?) =+782 ppm/℃,IR=6.5×10~(12)Ω,which was a similar result compared with the CaTiO_3 ceramics made from nanoparticles by sol-gel method.
The synthesis and dielectric properties of calcium titanate (CaTiO_3) submicron powder synthesized by mechanical ball-milling method have been investigated in this paper. Due to the ball-milling time increased, the size of CaTiO_3 particles decreased from micron to submicron, and a great deal of nanoparticles (50-100 nm) occurred. The CaTiO_3 ceramics made from submicron powders compact the structure at the sintering temperature of 1250 ℃ and had good dielectric properties: ε_r = 171, Q × f = 4361 GHz, τ_ (?) = +782 ppm / ° C, IR = 6.5x10 ~ (12) Ω, which was a similar result compared to the CaTiO_3 ceramics made from nanoparticles by sol-gel method.