Crystal structure, microwave dielectric properties, and far-infrared spectroscopy of a novel low-dielectric constant tremolite ceramic CaZnGe2O6

IF 44 1区医学 Q1 ENDOCRINOLOGY & METABOLISM

The Lancet Diabetes & Endocrinology Pub Date : 2024-10-11 DOI:10.1016/j.ceramint.2024.10.131

Shimeng Zhang, Zeyu He, Zhiguo Wang, Zhenggang Rao, Yunlong Hu, Chunchun Li, Longlong Shu

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Abstract

The diopside-structured CaZnGe₂O₆ ceramics were synthesized using the conventional solid-state reaction method in this study, and their crystal structure, microstructural evolution, and microwave dielectric properties were systematically investigated. The XRD and Rietveld refinement analyses confirmed that CaZnGe₂O₆ crystallizes in the monoclinic crystal system with a C2/c space group. The intrinsic microwave dielectric properties of the ceramics were evaluated using far-infrared spectroscopy. The ceramic structure exhibits high density and microstructural homogeneity after sintering at 1130 °C, resulting in exceptional microwave dielectric properties achieved at this optimal temperature (ε_r =8.78 Q×f = 63,782 GHz, τ_f = -66.4 ppm/°C). These findings highlight the potential application of CaZnGe₂O₆ ceramics as low-permittivity materials suitable for microwave devices.

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新型低介电常数透闪石陶瓷 CaZnGe2O6 的晶体结构、微波介电性能和远红外光谱分析

本研究采用常规固态反应方法合成了二片面结构的 CaZnGe2O6 陶瓷，并对其晶体结构、微观结构演变和微波介电性能进行了系统研究。XRD 和 Rietveld 精炼分析证实 CaZnGe2O6 结晶为单斜晶系，空间群为 C2/c。利用远红外光谱评估了陶瓷的内在微波介电性能。陶瓷结构在 1130 °C 烧结后表现出高密度和微观结构均匀性，从而在这一最佳温度下实现了优异的微波介电性能（εr =8.78 Q×f = 63,782 GHz，τf = -66.4 ppm/°C）。这些发现凸显了 CaZnGe2O6 陶瓷作为适用于微波器件的低容限材料的潜在应用价值。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

The Lancet Diabetes & Endocrinology ENDOCRINOLOGY & METABOLISM-

CiteScore

61.50

自引率

1.60%

发文量

371

期刊介绍： The Lancet Diabetes & Endocrinology, an independent journal with a global perspective and strong clinical focus, features original clinical research, expert reviews, news, and opinion pieces in each monthly issue. Covering topics like diabetes, obesity, nutrition, and more, the journal provides insights into clinical advances and practice-changing research worldwide. It welcomes original research advocating change or shedding light on clinical practice, as well as informative reviews on related topics, especially those with global health importance and relevance to low-income and middle-income countries. The journal publishes various content types, including Articles, Reviews, Comments, Correspondence, Health Policy, and Personal Views, along with Series and Commissions aiming to drive positive change in clinical practice and health policy in diabetes and endocrinology.