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Microstructures and microwave dielectric characteristics of ceramics with the composition BaO·Nd2O3·5TiO2

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Abstract

The microstructures and the microwave dielectric characteristics of BaO·Nd2O3·5TiO2 ceramics were determined as a function of the sintering conditions. The ceramics were confirmed to have a ternary orthorhombic major phase with minor amounts of Nd2Ti2O7 and TiO2, and nearly equiaxed fine structures and homogeneous columnar structures were obtained at sintering temperatures of 1340 ‡C and 1370 ‡C, respectively, while discontinuous and excess grain growth were observed at sintering temperatures 1350–1360 ‡C and 1380 ‡C, due to the formation of a liquid phase. The desired value of Qf was achieved in ceramics with fine-grained and/or homogeneous microstructures, and the discontinuous and excess grain growth was found to be seriously harmful to the dielectric properties.

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Author notes

  1. X. M. Chen

    Present address: Department of Materials Science and Engineering, Zhejiang University, 310029, Hangzhou, China

Authors and Affiliations

  1. Materials Research Department, Yokohama R & D Lab., The Furukawa Electric Co., Ltd., 220, Yokohama, Japan

    X. M. Chen & Y. Suzuki

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  1. X. M. Chen
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  2. Y. Suzuki
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  3. N. Sato
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Chen, X.M., Suzuki, Y. & Sato, N. Microstructures and microwave dielectric characteristics of ceramics with the composition BaO·Nd2O3·5TiO2 . J Mater Sci: Mater Electron 6, 10–16 (1995). https://doi.org/10.1007/BF00208127

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  • DOI: https://doi.org/10.1007/BF00208127

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