Microwave Dielectric Properties of Lanthanide Titanate Ceramics
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概要
- 論文の詳細を見る
Microwave dielectric property changes with substitution of La^<3+> by Nd^<3+> and/or Sm^<3+> ions are studied for La_2 Ti_2O_7 and La_4Ti_9O_<24> ceramics. For the monoclinic La_2Ti_2O_7, the substitution causes a considerable decrease in the permittivity (ε_r) of the material from ε_r=47 (La) to ε_r=36 (Nd), with a simultaneous variation in the Q・f value from 8500 to 16000 GHz. In La_4Ti_9O_<24>-type dielectrics, only a slight change is observed in both the ε_r(≈) and Q・f values (≈24000 GHz) by lanthanide substitution. The effects of mixing of different dielectric materials on the microwave properties are also examined for La_2Ti_2O_7-La_4Ti_9O_<24> and Nd_2Ti_2O_7-Nd_4Ti_9O_<24> composites. The permittivity and temperature coefficient of resonant frequency of the composite ceramics can be controlled using Lichteneker's rule, whereas the mixing of the different dielectrics results in the substantial lowering of the Q・f value.
- 社団法人応用物理学会の論文
- 1993-09-30
著者
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TAKAHASHI Junichi
Department of Internal Medicine, Kochi Red Cross Hospital
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Kageyama K
Sumitomo Metal Ind. Ltd. Amagasaki Jpn
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KAGEYAMA Keisuke
R &D Department, Sumitomo Special Metals Co., Ltd.
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KODAIRA Kouhei
Department of Applied Chemistry, Faculty of Engineering, Hokkaido University
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Kodaira Kouhei
Department Of Applied Chemistry Faculty Of Engineering Hokkaido University
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Takahashi Junichi
Department Of Animal Science Obihiro University Of Agriculture And Veterinary Medicine
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Takahashi Junichi
Department Of Applied Chemistry Faculty Of Engineering Hokkaido University
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TAKAHASHI JUNICHI
Department of Anesthesiology, Kawasaki Municipal Hospital
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