Effects of Ball Milling on the Properties of (Ba1-xCax)(Ti0.92Sn0.08)O3 Lead-Free Ceramics

Onchuda Wattanapradit; Pornsuda Bomlai

doi:10.4028/www.scientific.net/KEM.751.417

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HomeKey Engineering MaterialsKey Engineering Materials Vol. 751Effects of Ball Milling on the Properties of...

Effects of Ball Milling on the Properties of (Ba_1-xCa_x)(Ti_0.92Sn_0.08)O₃ Lead-Free Ceramics

Abstract:

The (Ba_1-xCa_x)(Ti_0.92Sn_0.08)O₃ (x = 0 and 0.02) lead-free ceramics were prepared by using different ball-milling method and time (common ball milling 24 h, high energy ball milling 1 and 3 h). The two-step sintering method was used for sintered the samples. The densification, structure, dielectric and piezoelectric properties of the ceramics were investigated. The results showed that Ca addition could reduce sintering temperature effectively and enhanced densification at lower temperature when using the common ball-milling type. The XRD patterns of (Ba_1-xCa_x) (Ti_0.92Sn_0.08)O₃ ceramics revealed the change in crystal symmetries from tetragonal to cubic phase with increasing Ca content from 0 to 0.02. However, the crystal structure did not change due to the effect of ball-milling method. Ca incorporation caused a decrease of the grain size and Curie temperature. Moreover, the largest grain size was found in the x = 0 ceramics with 24 h-common ball-milling, whereas the small size (< 5 µm) was obtained for the x = 0.02 ceramics. The dielectric and piezoelectric properties were also affected to Ca addition and ball-milling. High piezoelectric coefficient of d₃₃ = 173 pC/N, dielectric constant ε_r~ 3200 and dissipation factor tand ~ 0.05 were obtained for the x = 0 sample with high energy ball-milling for 1 h.

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Key Engineering Materials (Volume 751)

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417-422

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https://doi.org/10.4028/www.scientific.net/KEM.751.417

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August 2017

Authors:

Onchuda Wattanapradit, Pornsuda Bomlai*

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Ball-milling, Lead-Free Materials, Two-Step Sintering

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