<span style="font-size: 22.0pt;mso-bidi-font-size:15.0pt;font-family:"Times New Roman","serif"; mso-bidi-font-weight:bold">Preparation, characterization and dielectric studies of K_{<span style="font-size:17.0pt;mso-bidi-font-size:10.0pt; font-family:"Times New Roman","serif";mso-bidi-font-weight:bold">1-</span>}_{<span style="font-size:22.0pt;mso-bidi-font-size:15.0pt;font-family:"Times New Roman","serif"; mso-bidi-font-weight:bold">x</span>}<span style="font-size:22.0pt; mso-bidi-font-size:15.0pt;font-family:"Times New Roman","serif";mso-bidi-font-weight: bold">Na_xNbO_{<span style="font-size:17.0pt;mso-bidi-font-size: 10.0pt;font-family:"Times New Roman","serif";mso-bidi-font-weight:bold">3</span>}<span style="font-size:17.0pt;mso-bidi-font-size:10.0pt;font-family:"Times New Roman","serif"; mso-bidi-font-weight:bold"> </span></span></span>

Abstract

305-309<span style="font-size: 15.0pt;mso-bidi-font-size:8.0pt;font-family:" times="" new="" roman","serif""="">Ceramic pellets of <span style="font-size:22.0pt;mso-bidi-font-size:15.0pt; font-family:" times="" new="" roman","serif";mso-bidi-font-weight:bold"="">K1-<span style="font-size:22.0pt; mso-bidi-font-size:15.0pt;font-family:" times="" new="" roman","serif";mso-bidi-font-weight:="" bold"="">x<span style="font-size:22.0pt;mso-bidi-font-size:15.0pt; font-family:" times="" new="" roman","serif";mso-bidi-font-weight:bold"="">NaxNbO3<span style="font-size:12.5pt; mso-bidi-font-size:5.5pt;font-family:" arial","sans-serif""=""> system (for <span style="font-size:15.5pt;mso-bidi-font-size:8.5pt; font-family:" times="" new="" roman","serif""="">x <span style="font-size: 19.5pt;mso-bidi-font-size:12.5pt;font-family:" times="" new="" roman","serif""="">= 0, 0.1, 0.2. 0.3. 0.4, 0.5, 0.7) have been prepared by solid-state reaction method and sintering process. The prepared samples were characterized by XRD technique. All prepared samples show orthorhombic structure at room temperature. Frequency variations of dielectric constant, loss tangent, and electrical <span style="font-size: 15.0pt;mso-bidi-font-size:8.0pt;font-family:" times="" new="" roman","serif""="">conductivity have been investigated, at room temperature, in the frequency range 1-40 MHz. It is observed that, dielectric constant decreases as sodium is mixed by a step of 10 % in potassium niobate. </span