<span style="font-size:14.0pt;line-height: 115%;font-family:"Times New Roman";mso-fareast-font-family:"Times New Roman"; color:black;mso-ansi-language:EN-IN;mso-fareast-language:EN-IN;mso-bidi-language: HI" lang="EN-IN">Transport characteristics of 0.3 KCI : 0.7 ZrO₂ solid electrolyte</span>

Abstract

Composite solid electrolyte having composition 0.3 KCl : 0.7 ZrO₂ (mol%) which is highly conducting in the system(1<i>-x</i>)<i> </i>KCl : <i>x </i>ZrO₂ has been prepared following the conventional ceramic powder processing route. The temperature

<span style="font-size:14.0pt;line-height:115%;font-family:" times="" new="" roman";="" mso-fareast-font-family:"times="" roman";color:black;mso-ansi-language:en-in;="" mso-fareast-language:en-in;mso-bidi-language:hi"="" lang="EN-IN">dependent conductivity (σ)<i> </i>and mobility (μ) have been studied using complex impedance spectroscopy and transient ionic current techniques respectively. The noticeable conductivity enhancement is found to take place from 300^oC at which the σ was <i>μ</i> S/m. The conductivity at 500^oC up to which the measurements are taken is 1120 <i>μ</i> S/m<span style="font-size:14.0pt; line-height:115%;font-family:" times="" new="" roman";mso-fareast-font-family:hiddenhorzocr;="" color:black;mso-ansi-language:en-in;mso-fareast-language:en-in;mso-bidi-language:="" hi"="" lang="EN-IN">. <span style="font-size:14.0pt;line-height:115%; font-family:" times="" new="" roman";mso-fareast-font-family:"times="" roman";="" color:black;mso-ansi-language:en-in;mso-fareast-language:en-in;mso-bidi-language:="" hi"="" lang="EN-IN">The increase in the ionic mobility in the temperature range 300 to 460^oC is found to be nominal. The temperature dependent carrier concentrations(<i>n</i>) as estimated from the temperature dependent <i>σ</i> and <i>μ</i><span style="font-size:14.0pt;line-height:115%;font-family:" times="" new="" roman";="" mso-fareast-font-family:hiddenhorzocr;color:black;mso-ansi-language:en-in;="" mso-fareast-language:en-in;mso-bidi-language:hi"="" lang="EN-IN"> <span style="font-size:14.0pt;line-height:115%;font-family:" times="" new="" roman";="" mso-fareast-font-family:"times="" roman";color:black;mso-ansi-language:en-in;="" mso-fareast-language:en-in;mso-bidi-language:hi"="" lang="EN-IN">data has been found to increase from 7.24×10¹⁷ m^-3 (at300^oC) to 9.70×<span style="font-size:14.0pt;line-height:115%;font-family:" times="" new="" roman";="" mso-fareast-font-family:hiddenhorzocr;color:black;mso-ansi-language:en-in;="" mso-fareast-language:en-in;mso-bidi-language:hi"="" lang="EN-IN">10¹⁹ m^-3 <span style="font-size:14.0pt;line-height:115%;font-family: " times="" new="" roman";mso-fareast-font-family:"times="" roman";color:black;="" mso-ansi-language:en-in;mso-fareast-language:en-in;mso-bidi-language:hi"="" lang="EN-IN">(at 460^oC). This study indicates that the ionic conductivity is predominantly governed by mobile ion concentration.</span></span></span></span></span></span></span>