Structure and electric properties of Na2SO4-NaPO3 glasses

Соколов, И. А.; Murin, I. V.; Kriyt, Vladimir E.; Пронкин, А. А.

doi:10.1134/s1023193511040173

Cited by 4 publications

(1 citation statement)

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“…In this study, we propose using a NaPO 3 glass (50Na 2 O-50P 2 O 5 ) as one component of raw materials for the synthesis of stoichiometric NZSP. Since the NaPO 3 glass has a low glass transition temperature, it is expected that a liquid phase is created during the reaction of raw materials [33][34][35][36][37][38], i.e., the liquid-phase sintering (LPS). In other words, the formation of NZSP would be expected to occur at lower temperatures and in shorter times in the use of glass as a raw material compared with the SSR method using crystalline compounds as raw materials.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Na+ Ion Conductivity of Stoichiometric Na3Zr2Si2PO12 by Liquid-Phase Sintering with NaPO3 Glass

Honma

Komatsu

2021

Materials

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Sodium super ionic conductor (NASICON)-type Na3Zr2Si2PO12 (NZSP) with the advantages of the high ionic conductivity, stability and safety is one of the most famous solid-state electrolytes. NZSP, however, requires the high sintering temperature about 1200 °C and long sintering time in the conventional solid-state reaction (SSR) method. In this study, the liquid-phase sintering (LPS) method was applied to synthesize NZSP with the use of NaPO3 glass with a low glass transition temperature of 292 °C. The formation of NZSP was confirmed by X-ray diffraction analyses in the samples obtained by the LPS method for the mixture of Na2ZrSi2O7, ZrO2, and NaPO3 glass. The sample sintered at 1000 °C for 10 h exhibited a higher Na+ ion conductivity of 1.81 mS/cm at 100 °C and a lower activation energy of 0.18 eV compared with the samples prepared by the SSR method. It is proposed that a new LPE method is effective for the synthesis of NZSP and the NaPO3 glass has a great contribution to the Na+ diffusion at the grain boundaries.

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