Structural, optical band gap, microwave dielectric properties and dielectric resonant antenna studies of Ba(1-x)La(2x/3)ZrO3 (0 ≤ x ≤ 0.1) ceramics

被引：11
作者：
Bisen, Anurag [1 ]
Satapathy, A. [1 ]
Parida, S. [2 ]
Sinha, E. [1 ]
Rout, S. K. [1 ]
Kar, M. [3 ]
机构：
[1] Birla Inst Technol, Dept Phys, Ranchi 835215, Bihar, India
[2] CV Raman Coll Engn, Dept Phys, Bhubaneswar 752054, Orissa, India
[3] Indian Inst Technol, Dept Phys, Patna 800013, Bihar, India
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2014年 / 615卷
关键词：
Powders-ceramics; Band gap; Microwave dielectric properties; Dielectric resonator antenna (DRA); High frequency structure simulator software (HFSS); LUMINESCENCE PROPERTIES; COMPLEX PERMITTIVITY; BAZRO3; FREQUENCY; SPECTRA; GROWTH; GREEN; SHAPE; ER; DY;
D O I：
10.1016/j.jallcom.2014.07.007
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The structural properties of the Ba(1-x)La(2x/3)ZrO3 system were investigated by means of XRD, FT-Raman and FTIR. The XRD analysis demonstrated that lattice parameter gradually decreased with increase of La content. Raman analysis intended the formation of higher degree of symmetry to increase of La3+ content. It was also confirmed from FTIR analysis. The optical band gap was found to be decreased from 3.55 eV to 3.01 eV with increase of La3+ content. The surface morphology was studied by the SEM. The microwave dielectric constant and quality factor were investigated by the method as proposed by Hakki-Coleman. The microwave dielectric constant decreased from 38.40 to 30.47 and the value of tau(f) changed from 384.71 ppm/degrees C to 165.41 ppm/degrees C. The Q x f values increased from 5731 to 9031 with increase of La3+ content. The dielectric resonator antenna (DRA) was investigated experimentally and numerically using a monopole antenna through an infinite ground plane and Ansoft's high frequency structure simulator software, respectively. The required resonance frequency and bandwidth of DRA were investigated in the composition between 0 <= x <= 0.1. (C) 2014 Elsevier B.V. All rights reserved.
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页码：1006 / 1012
页数：7
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