Microwave dielectric properties and low-temperature sintering of (1-x)BaTi4O9-xBaMoO4 composite ceramics

Citation

Pang, Li Xia and Li, Hui and Li, Wen Bo and Zhang, Qian and Chen, Ya Wei and Zhang, Mei Rong and Xu, Di Ming and Tan, Kar Ban and Zhou, Di (2025) Microwave dielectric properties and low-temperature sintering of (1-x)BaTi4O9-xBaMoO4 composite ceramics. Journal of Alloys and Compounds, 1045. art. no. 184690. pp. 1-8. ISSN 0925-8388

Abstract

Low-temperature co-fired ceramics (LTCC) technology is a promising solution for achieving miniaturization and integration in microwave devices. In this study, a novel series of (1-x)BaTi4O9-xBaMoO4 (x = 0.1, 0.2, 0.3, and 0.4) ceramics were synthesized via solid-state reaction. Orthorhombic BaTi4O9 phase and tetragonal BaMoO4 phase coexist in the (1-x)BaTi4O9-xBaMoO4 composite system. The 0.6BaTi4O9-0.4BaMoO4 composition sintered at 1260 °C for 4 h demonstrated optimal microwave dielectric properties: a relative permittivity (εr) of ∼26.8, a high Q×f value of ∼50,100 GHz (at 7.24 GHz), and a near-zero temperature coefficient of resonant frequency (τf) of + 3.7 ppm/°C. Remarkably, the sintering temperature of the 0.6BaTi4O9-0.4BaMoO4 ceramics was significantly reduced from 1260 °C to 920 °C by incorporating 3 wt% BaCu(B2O5) additive, while maintaining excellent performance (εr ∼ 26.1, Q×f ∼ 27,900 GHz at 7.32 GHz, τf ∼ +6.3 ppm/°C). Furthermore, it exhibited excellent chemical compatibility with Ag electrodes, confirming its potential as a candidate material for LTCC microwave applications.

Download File

Text
124299.pdf - Published Version
Restricted to Repository staff only
Download (3MB)

Official URL or Download Paper: https://www.sciencedirect.com/science/article/pii/...

Additional Metadata

Item Type:	Article
Subject:	Mechanics of Materials
Subject:	Mechanical Engineering
Subject:	Metals and Alloys
Divisions:	Faculty of Science
DOI Number:	https://doi.org/10.1016/j.jallcom.2025.184690
Publisher:	Elsevier
Keywords:	BaCu(B2O5); BaTi4O9-BaMoO4; Low-temperature co-fired ceramics technology (LTCC); Microwave dielectric properties
Sustainable Development Goals (SDGs):	SDG 9: Industry, Innovation and Infrastructure, SDG 12: Responsible Consumption and Production, SDG 7: Affordable and Clean Energy
Depositing User:	Ms. Nur Faseha Mohd Kadim
Date Deposited:	07 May 2026 00:55
Last Modified:	07 May 2026 00:55
Altmetrics:	http://www.altmetric.com/details.php?domain=psasir.upm.edu.my&doi=10.1016/j.jallcom.2025.184690
URI:	http://psasir.upm.edu.my/id/eprint/124299
Statistic Details:	View Download Statistic

Actions (login required)

View Item