Fast Solidification and Electrical Conductivity of Apatite-Type Nanoceramics

Qin Li; Li Min Dong

doi:10.4028/www.scientific.net/AMR.981.909

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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 981Fast Solidification and Electrical Conductivity of...

Fast Solidification and Electrical Conductivity of Apatite-Type Nanoceramics

Abstract:

Apatite oxides electrolytes La_9.33(SiO₄)₆O₂ was prepared following the Sol-Gel aqueous route. The structure of La_9.33(SiO₄)₆O₂ was evaluated using the X-ray diffraction patterns (PXRD). The main phase is La_9.33Si₆O₂₆ with the Minor impurity phase of La₂SiO₅ as a secondary phase. And dense La_9.33(SiO₄)₆O₂ nanoceramics with grain size of smaller than 100 nm were fabricated by high-pressure sintering, the pressure of 4.5 GPa, the sintering temperature of 1200 ^oC and dwelling time of 10 min were used. The ionic conductivity of the samples is evaluated by AC impedance spectroscopy. The conductivity of dense La_9.33(SiO₄)₆O₂ nanoceramics by high-pressure densification is one multiple higher compared with that of the microcrystalline ceramics. The activation energy in the samples by high-pressure densification and conventional sintering method was 1.06 eV and 1.44 eV, respectively.

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Advanced Materials Research (Volume 981)

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909-913

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https://doi.org/10.4028/www.scientific.net/AMR.981.909

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July 2014

Authors:

Qin Li*, Li Min Dong

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Electrical Conductivity, Microstructure, Nanostructured Materials, Sintering

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