The Enhanced Thermal Stability of (Mg0.95Ni0.05)2TiO4 Dielectric Ceramics Modified by a Multi-Phase Method-Reference-Cited by-同舟云学术

The Enhanced Thermal Stability of (Mg0.95Ni0.05)2TiO4 Dielectric Ceramics Modified by a Multi-Phase Method

Published:2023-04-10 Issue:8 Volume:16 Page:2997
ISSN:1996-1944
Container-title:Materials
language:en
Short-container-title:Materials

Author:

Shen Chun-Hsu¹^ORCID,Shen Ting-Wei²,Hsieh Tsai-Yu¹,Lan Kai-Chun¹,Hsu Shen-Hsien¹,Wang Ching-Hsuan¹,Lin Yu-Ting³,Wu Wen-Fang²,Tseng Zong-Liang³^ORCID

Affiliation:

1. Department of Electronic Engineering, Ming Chuan University, Taoyuan City 333, Taiwan

2. Department of Mechanical Engineering, National Taiwan University, Taipei 106, Taiwan

3. Department of Electronic Engineering and Organic Electronics Research Center, Ming Chi University of Technology, New Taipei City 243, Taiwan

Abstract

The thermal stability of (Mg0.95Ni0.05)2TiO4 dielectric ceramics has been improved by mixing with CaTiO3 phases owing to higher positive temperature coefficients. The pure (Mg0.95Ni0.05)2TiO4 and the mixture phase systems of CaTiO3-modified (Mg0.95Ni0.05)2TiO4 were verified by XRD diffraction patterns to ensure the crystallite of different phases. The microstructures of the CaTiO3-modified (Mg0.95Ni0.05)2TiO4 were observed by SEM and EDS to investigate the relation between element ratios and grains. As a result, it can be seen that the thermal stability of the CaTiO3-modified (Mg0.95Ni0.05)2TiO4 can be effectively enhanced, compared with the pure (Mg0.95Ni0.05)2TiO4. Moreover, the radio frequency dielectric performances of CaTiO3-modified (Mg0.95Ni0.05)2TiO4 dielectric ceramics are strongly dependent upon the density and the morphology of the specimens. The champion sample with the ratio of (Mg0.95Ni0.05)2TiO4 and CaTiO3 of 0.92:0.08 showed an εr value of 19.2, an Qf value of 108,200 GHz, and a τf value of −4.8 ppm/°C, which may encourage (Mg0.95Ni0.05)2TiO4 ceramics to broaden the range of novel applications and match the requirements of 5G or next-generation communication systems.

Publisher

MDPI AG

Subject

General Materials Science

Link

https://www.mdpi.com/1996-1944/16/8/2997/pdf

Reference28 articles.

1. Freitas, A.E., Manhabosco, T.M., Batista, R.J.C., Segundo, A.K.R., Araújo, H.X., Araújo, F.G.S., and Costa, A.R. (2020). Development and Characterization of Titanium Dioxide Ceramic Substrates with High Dielectric Permittivities. Materials, 13.

2. Aljaafari, A., and Sedky, A. (2020). Influence of Fine Crystal Percentage on the Electrical Properties of ZnO Ceramic-Based Varistors. Crystals, 10.

3. Effect of ZnO on Mg2TiO4–MgTiO3–CaTiO3 Microwave Dielectric Ceramics Prepared by Reaction Sintering Route;Yu;Adv. Appl. Ceram.,2019

4. Microwave Dielectric Properties of Low-Fired [Mg0.98(Li0.5Bi0.5)0.02]2SiO4–Ca0.8Sm0.4/3TiO3 Composite Ceramics;Zhai;J. Mater. Sci. Mater. Electron.,2018

5. Structural Ceramic Nanocomposites: A Review of Properties and Powders’ Synthesis Methods;Palmero;Nanomaterials,2015