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4. Low-temperature sintering and microwave dielectric property of Ba6-3xSm8+2xTi18O54 solid solution;Ota;J. Ceram. Soc. Jpn.,2002
5. Ohsato, H., Imaeda, M., Takagi, Y., Komura, A. and Okuda, T., Microwave quality factor improved by ordering of Ba and rare-earth on the tungstenbronze-type Ba6-3xR8+2xTi18O54 (R=La, Pr, Nd and Sm) solid solution. In Proc. 11th IEEE Int. Symp. on Applications of Ferroelectrics, 1998, IEEE catalog number 98CH36245, pp. 509-512.