Mechano-chemical Synthesis of RbAg_4I_5 and KAg_4I_5 Crystals and Their Silver Ion Conducting Properties

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Abstract

A high-energy-ball-milling process was applied to the synthesis of the RbAg<SUB>4</SUB>I<SUB>5</SUB> and KAg<SUB>4</SUB>I<SUB>5</SUB> crystalline phases, which were known to show high Ag<SUP>+</SUP> ion conductivity 2.7×10<SUP>1</SUP> Sm<SUP>-1</SUP> at room temperature. RbI, KI, and AgI were used as raw materials for the mechanical synthesis of the RbAg<SUB>4</SUB>I<SUB>5</SUB> and KAg<SUB>4</SUB>I<SUB>5</SUB> phases. Only 20min-ball milling of a mixture of RbI and AgI led to the formation of RbAg<SUB>4</SUB>I<SUB>5</SUB> phase, and the powder sample after 140 min-ball milling was containing only RbAg<SUB>4</SUB>I<SUB>5</SUB> phase. On the other hand, the preparation of the sample containing only KAg<SUB>4</SUB>I<SUB>5</SUB> phase needed the ball-mill treatment more than 50h.The obtained RbAg<SUB>4</SUB>I<SUB>5</SUB> and KAg<SUB>4</SUB>I<SUB>5</SUB> samples showed high ion conductivity more than 10<SUP>1</SUP> Sm<SUP>-1</SUP> at room temperature, and the conductivities were almost same as those of the RbAg<SUB>4</SUB>I<SUB>5</SUB> and KAg<SUB>4</SUB>I<SUB>5</SUB> crystalline phases reported by Owens et al. The DC polarization measurements suggested that main carrier of the ball-milled samples was silver ions and the silver ion transport numbers of the ball-milled samples were almost unity.

Journal

  • Journal of the Japan Society of Powder and Powder Metallurgy

    Journal of the Japan Society of Powder and Powder Metallurgy 49(2), 69-74, 2002-02-15

    Japan Society of Powder and Powder Metallurgy

References:  12

Cited by:  2

Codes

  • NII Article ID (NAID)
    10008007262
  • NII NACSIS-CAT ID (NCID)
    AN00222724
  • Text Lang
    ENG
  • Article Type
    Journal Article
  • ISSN
    05328799
  • NDL Article ID
    6059791
  • NDL Source Classification
    ZP41(科学技術--金属工学・鉱山工学)
  • NDL Call No.
    Z17-274
  • Data Source
    CJP  CJPref  NDL  J-STAGE 
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