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首页> 外文期刊>Journal of Materials Research >Structure and microwave dielectric properties of (Zn_(1-x)Ni_x)TiO_3 ceramics
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Structure and microwave dielectric properties of (Zn_(1-x)Ni_x)TiO_3 ceramics

机译：（Zn_（1-x）Ni_x）TiO_3陶瓷的结构和微波介电性能

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摘要

Dielectric ceramics in the system (Zn_(1-x)Ni_x)TiO_3, x = 0 to 1 were synthesized by the solid-state reaction route. The phase distribution, microstructure, and dielectric properties were characterized using powder x-ray diffraction analysis, electron microscopy, and microwave measurement techniques. Three phase composition regions were identified in the specimens sintered at 1150 ℃: [spinel + rutile] at 0 ≤ x ≤ 0.5, [spinel + ilmenite + rutile] at 0.5 < x ≤ 0.8, and [ilmenite] phase at 0.8 < x ≤1. For the 0 ≤ x ≤ 0.5 region, the amount of Ti-rich precipitates incorporated into the spinel phase decreased with the Ni content at 0 ≤ x ≤ 0.5, with a concomitant increase of the rutile phase. The microwave dielectric properties depended on the phase composition and volume according to the three typical phase regions, where the relative amount of rutile to the spinel or ilmenite determined the dielectric properties. The dielectric constant as a function of Ni addition was modeled with a Maxwell mixing rule. An optimum phase distribution was determined in this system with dielectric constant of 22, a Q x f of 60,000, and a low temperature coefficient of the resonant frequency.
机译：通过固相反应路线合成了（Zn_（1-x）Ni_x）TiO_3，x = 0至1的体系中的介电陶瓷。使用粉末X射线衍射分析，电子显微镜和微波测量技术来表征相分布，微观结构和介电性能。在1150℃烧结的样品中确定了三个成分区域：[尖晶石+金红石]在0≤x≤0.5，[尖晶石+钛铁矿+金红石]在0.5

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