Title of article
Effect of Nb2O5 content on dielectric characteristics of tungsten–bronze-structured KLN ceramics
Author/Authors
Xu، نويسنده , , Shu-Lun and Lee، نويسنده , , Joon-Hyung and Kim، نويسنده , , Jeong-Joo and Young Lee، نويسنده , , Hee and Cho، نويسنده , , Sang-Hee، نويسنده ,
Issue Information
روزنامه با شماره پیاپی سال 2003
Pages
4
From page
483
To page
486
Abstract
The effect of excess Nb2O5 on the dielectric characteristics of tungsten–bronze-structured polycrystalline K3Li2Nb5O15 (KLN) ceramics was studied. During sintering, the evaporation of K and Li was inevitable, which caused an effective increase of Nb content in the crystal. Even though the initial composition was below the boundary, where the crystal structure of KLN changed from tetragonal to orthorhombic, the composition passed over the boundary due to evaporation. The composition shift took away the dielectric relaxation near the phase transformation temperature. Ti addition was effective in suppressing the evaporation of K and Li and revived the phase transformation. The evaporation of cations was explained from the viewpoint of lattice stability.
Keywords
permittivity , Thermal evaporation , Phase transitions , Tungsten bronzes
Journal title
MATERIALS SCIENCE & ENGINEERING: B
Serial Year
2003
Journal title
MATERIALS SCIENCE & ENGINEERING: B
Record number
2140768
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