Preparation and Dielectric Properties of Low-Temperature-Sinterable (Zr0.8Sn0.2)TiO4 Powder |
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| Authors: | Kyoung R Han Jin-Wook Jang Seo-Yong Cho Dae-Yong Jeong Kug-Sun Hong |
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| Affiliation: | Division of Ceramics, Korea Institute of Science and Technology, Cheongryang, Seoul 130-650, Korea;Department of Materials Science and Engineering, Seoul National University, Seoul, Korea |
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| Abstract: | Low-temperature-sinterable (Zr0.8Sn0.2)TiO4 powders were prepared using 3 mol% Zn(NO3)2 additive and then compared with powders prepared using 3 mol% ZnO additive and no additives. Sintering at 1200°C for 2 h produced a dielectric ceramic with ρ= 98.6% of theoretical density (TD), ?r= 38.4, Q × f (GHz) = 42000, and τ f =?1 ppm/°C. Sintering at 1250°C resulted in an excellent dielectric with ρ= 99% of TD, epsilonr= 40.9, Q × f (GHz) = 49000, and τ f =?2 ppm/°C. Scanning electron microscopy showed a microstructure with grains measuring 0.5 to 1 μm, and transmission electron microscopy revealed secondary phase in the grain boundaries. |
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