Effect of Neodymium on Optical Bandgap and Microwave Dielectric Properties of Barium Zirconate Ceramic
Effect of Neodymium on Optical Bandgap and Microwave Dielectric Properties of Barium Zirconate Ceramic
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钕对锆酸钡陶瓷光学带隙和微波介电性能的影响
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发表时间：
2015
期刊：
影响因子：
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通讯作者：
S. K. Rout
中科院分区：
文献类型：
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作者：
S. Parida;A. Satapathy;E. Sinha;A. Bisen;S. K. Rout
采用固相反应法制备了通式为Ba（1-x）Nd（2x/3）ZrO3（x = 0.0，0.02，0.04，0.06，0.08和0.1）的陶瓷。通过X射线衍射（XRD）、傅里叶变换拉曼（FT-Raman）和傅里叶变换红外（FTIR）光谱分析了粉末的物相形成。XRD分析表明，所有粉体均为钙钛矿型立方结构，空间群为Pm-3m。FT-Raman和FTIR光谱表明晶体中形成了较高的对称度。随着Nd~（3+）掺杂量的增加，薄膜的光学带隙逐渐减小，乌尔巴赫能逐渐增大。用扫描电子显微镜研究了烧结球团的表面形貌。用TE 01 δ模介质谐振器法测量了微波介电常数和品质因数。微波介电常数和谐振频率温度系数随Nd~（3+）含量的增加而减小。由于材料中的非本征损耗，观察到品质因数（Q × f）的不规则性质。利用介质谐振器天线通过无限大接地面和Ansoft高频结构仿真软件，分别对介质谐振器天线的特性进行了实验和数值研究。研究了陶瓷DRA的谐振频率和带宽。
The ceramics with general formula Ba(1−x) Nd(2x/3)ZrO3 (x = 0.0,0.02, 0.04, 0.06, 0.08, and 0.1) were prepared by solid-state reaction. The phase formation of the powders was analyzed by means of X-ray diffraction (XRD), Fourier transform-Raman (FT-Raman), and Fourier transform infrared (FTIR) spectroscopy. XRD patterns revealed that all powders show a perovskite-type cubic structure with space group Pm-3m. FT-Raman and FTIR spectra suggested the formation of higher degree of symmetry in the crystal. The optical bandgap was found to be decreasing while Urbach energy was found to be increasing with an increase of Nd3+ content. The surface morphology of sintered pellets was studied by scanning electron microscope. Microwave dielectric constant and quality factor were investigated by the TE01δ mode dielectric resonator method. The microwave dielectric constant and temperature coefficient of resonant frequency decreases with increase in of Nd3+ content. The irregular nature of quality factor (Q × f) was observed due to the extrinsic losses in materials. The dielectric resonator antenna (DRA) characteristics were investigated experimentally and numerically using a monopole antenna through an infinite ground plane and Ansoft’s high-frequency structure simulator software, respectively. The resonant frequency and bandwidth of DRAs were also investigated for the ceramics.