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首页> 外文期刊>CERAMICS INTERNATIONAL >Phase composition, microstructure, and dielectric properties of dysprosium-doped Ba(Zr_(0.1)Ti_(0.9))O_3-based Y5V ceramics with high permittivity
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Phase composition, microstructure, and dielectric properties of dysprosium-doped Ba(Zr_(0.1)Ti_(0.9))O_3-based Y5V ceramics with high permittivity

机译：高介电常数掺Ba（Zr_（0.1）Ti_（0.9））O_3基Y5V陶瓷的相组成，微观结构和介电性能

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摘要

Barium zirconium titanate, Ba(Zr_(0.1)Ti_(0.9))O_3, nanopowders modified with zinc (Zn), niobium (Nb), and dysprosium (Dy) were synthesized by a sol-gel process. The relationships among the phase compositions, microstructures, and properties of sintered ceramics were investigated. The microstructural investigation showed that the grain size of Ba(Zr_(0.1)Ti_(0.9))O_3-Zn-Nb ceramics was in the range 30-3 μm when the Dy content increased from 0.0 to 0.6 mol%. Average grain size of the ceramics decreased with increasing concentration of Dy; however, the maximum dielectric constant (ε_(max)) first increased and then decreased. Using a modified version of the Curie-Weiss law, a critical exponent (γ) was calculated. When the Dy concentration was 0.4 mol%, the γ coefficient for the sample equaled approximately 1.43, which confirms that the material shows relaxor behavior. Our results show that these materials met the Electronic Industries Alliance Y5V specifications and that ε_(max) was higher than 20,000, with a dielectric loss (at 25 ℃) of only 0.006.
机译：通过溶胶-凝胶法合成了钛酸钡锆，Ba（Zr_（0.1）Ti_（0.9））O_3，经锌（Zn），铌（Nb）和（Dy）改性的纳米粉。研究了烧结陶瓷的相组成，微观结构和性能之间的关系。显微组织研究表明，当Dy含量从0.0 mol％增加到0.6 mol％时，Ba（Zr_（0.1）Ti_（0.9））O_3-Zn-Nb陶瓷的晶粒尺寸在30-3μm范围内。随着Dy浓度的增加，陶瓷的平均晶粒尺寸减小。但是，最大介电常数（ε_（max））先增加然后减少。使用居里-魏斯定律的修改版，计算出临界指数（γ）。当Dy浓度为0.4mol％时，样品的γ系数约等于1.43，这证实该材料表现出弛豫性能。我们的结果表明，这些材料符合电子工业联盟Y5V规范，并且ε_（max）高于20,000，并且介电损耗（在25℃时）仅为0.006。

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