Study on growth, optical and dielectric properties of ‘Nd’ DOPED NBT-BT (0.94(Na0.5Bi0.5tio3)-0.06batio3) relaxor ferroelectric single crystals

IF 1.7 4区材料科学 Q2 MATERIALS SCIENCE, CERAMICS Journal of Electroceramics Pub Date : 2022-04-01 DOI:10.1007/s10832-022-00282-x

Shanmuga Sundari Sankaran, Dhanasekaran. R, Binay Kumar, Durairajan. A, Valente M.A., Devaraj Stephen. L

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引用次数: 1

Abstract

The present work describes the effect of Neodymium (Nd) in the NBT-BT (0.94Na_0.5Bi_0.5TiO₃-0.06BaTiO₃ (NBT-BT (94/06)) + xNd (x = 0, 0.4, 0.6, 0.8, 1.0 wt%)) crystal grown by flux method. As the concentration of the Nd increases beyond 0.4 wt%, homogeneity of the solution is lost and the multinucleation was observed. Color of the crystal changed from yellow to muddy green and size of the crystals were reduced due to the incorporation of Nd in NBT-BT. Nd completely diffused into the NBT-BT lattice, hence no secondary phase formation was observed in XRD. But the peaks were shifted towards the higher angle side due to the shrinkage of NBT-BT lattice. Optical properties of the crystals are studied using UV–visible and photoluminescence spectra. Except 0.4 wt% of Nd, for all other concentration emission at 1064 nm was observed in the PL spectra. Effect of Nd in dielectric constant and the relaxor properties are discussed in detail.

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Nd掺杂NBT-BT (0.94(Na0.5Bi0.5tio3)-0.06batio3)弛豫铁电单晶的生长、光学和介电性能研究

本文描述了钕(Nd)在熔剂法生长NBT-BT (0.94Na0.5Bi0.5TiO3-0.06BaTiO3 (NBT-BT (94/06)) + xNd (x = 0,0.4, 0.6, 0.8, 1.0 wt%))晶体中的作用。当Nd浓度超过0.4 wt%时，溶液的均匀性丧失，出现多核现象。NBT-BT中Nd的掺入使晶体颜色由黄色变为浑浊绿色，晶体尺寸减小。Nd完全扩散到NBT-BT晶格中，因此XRD未观察到二次相的形成。但由于NBT-BT晶格的收缩，峰向高角度侧偏移。利用紫外可见光谱和光致发光光谱研究了晶体的光学性质。除0.4 wt%的Nd外，其余浓度均在1064 nm处发光。详细讨论了Nd对介电常数和弛豫特性的影响。

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来源期刊

Journal of Electroceramics 工程技术-材料科学：硅酸盐

CiteScore

2.80

自引率

5.90%

发文量

审稿时长

5.7 months

期刊介绍： While ceramics have traditionally been admired for their mechanical, chemical and thermal stability, their unique electrical, optical and magnetic properties have become of increasing importance in many key technologies including communications, energy conversion and storage, electronics and automation. Electroceramics benefit greatly from their versatility in properties including: -insulating to metallic and fast ion conductivity -piezo-, ferro-, and pyro-electricity -electro- and nonlinear optical properties -feromagnetism. When combined with thermal, mechanical, and chemical stability, these properties often render them the materials of choice. The Journal of Electroceramics is dedicated to providing a forum of discussion cutting across issues in electrical, optical, and magnetic ceramics. Driven by the need for miniaturization, cost, and enhanced functionality, the field of electroceramics is growing rapidly in many new directions. The Journal encourages discussions of resultant trends concerning silicon-electroceramic integration, nanotechnology, ceramic-polymer composites, grain boundary and defect engineering, etc.