Enhanced dielectric properties of Ba3ZnTa2−xNbxO9 in microwave region using tungstic acid. (2nd January 2020)

• Record Type: Journal Article
• Authors: Tomar, Richa; Bisht, Yogita; Abhilash, Pullanchiyodan; Thirumal, Meganathan
• Is Part Of: Phase transitions. Volume 93:Number 1(2020)
• Page Start: 175
• Page End: 182
• Publication Date: 2020-01-02
• Subjects: Perovskite -- 1:2 ordering -- dielectric properties -- high Q -- ceramics; Phase transformations (Statistical physics) -- Periodicals; 530.47405
• DOI: 10.1080/01411594.2019.1696464
• Languages: English
• ISSNs: 0141-1594

Abstract

ABSTRACT: Dielectric resonators belonging to the families of complex perovskite Ba3 ZnTa2− x Nb x O9 were synthesized by a solid-state reaction route. Calcination at 1250°C leads to oxides with ordered (hexagonal) perovskite structure over the range (0.25 ≤ x ≤ 1.75). However, ordering refraction intensity of PXRD patterns increased on sintering at 1340°C with tungstic acid, as a sintering aid. Sintering has lead to >90% density. In microwave range, Ba3 ZnTa0.5 Nb1.5 O9 shows much higher permittivity (35) and quality factor (43, 120 GHz).