Dielectric relaxation anal microwave loss in the La(Mg1/2Ti1/2)O-3-(Na1/2Bi1/2)TiO3 perovskite ceramics

Salak  AN; Ferreira  VM; Vieira  LGRibeiro  JLPullar  RCAlford  NM

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Dielectric relaxation anal microwave loss in the La(Mg1/2Ti1/2)O-3-(Na1/2Bi1/2)TiO3 perovskite ceramics

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Dielectric response of the perovskite ceramics (1-x)La(Mg1/2Ti1/2)O3-x(Na1/2Bi1/2)TiO3 (1-x)LMT-xNBT (0 = 0.2 is frequency-dependent over a wide range (10(2)-10(9) Hz) below the resonant frequencies of the polar phonon modes. Contributions of different factors (both extrinsic and intrinsic) to the microwave dielectric loss of the ceramics were considered. The dielectric relaxation has been associated with the amount of bismuth in the system. The relaxation in LMT-NBT was considered in the context of similar effects observed in other Bi-containing, A-site disordered oxygen-octahedral compositions.

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《Journal of Materials Research》 |2007年第10期|2676-2684|共9页
作者
Salak AN; Ferreira VM; Vieira LGRibeiro JLPullar RCAlford NM;
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作者单位

Univ Aveiro, Ctr Res Ceram & Composite Mat CICECO, Dept Ceram & Glass Engn, P-3810193 Aveiro, Portugal;

Univ Aveiro, Ctr Res Ceram & Composite Mat CICECO, Dept Civil Engn, P-3810193 Aveiro, Portugal;

Univ Minho, Dept Phys, P-4710057 Braga, PortugalS Bank Univ, Fac Engn Sci & Built Environm, Ctr Phys Elect & Mat, London SE1 0AA, England;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
原文格式 PDF
正文语种英语
中图分类工程材料学;
关键词
BI2O3-ZNO-NB2O5 CUBIC PYROCHLORE; FERROELECTRIC RELAXOR; NA0.5BI0.5TIO3; FREQUENCY;

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Dielectric relaxation anal microwave loss in the La(Mg1/2Ti1/2)O-3-(Na1/2Bi1/2)TiO3 perovskite ceramics

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