Work

Optimizing phase stability and synthesis of calcium/magnesium vanadates for low-temperature cofired ceramics: Phase diagram study and thermodynamic modelling

Year: 2025

Type: article

Abstract: Calcium and magnesium vanadates in the CaO-V 2 O 5 and MgO-V 2 O 5 systems have attracted considerable attention as potential low-temperature cofired ceramics (LTCC) owing to their relatively low melting temperatures, wide compositional tunability, and promising dielectric performance. In this study, key phase diagram experiments were conducted for both systems using X-ray diffraction (XRD) and simultaneous thermal analysis (STA). Notably, Ca 7 V 4 O 17 was identified in the CaO-V 2 O 5 system. The thermodynamic modeling of these two systems was reconstructed using the CALPHAD (CALculation of PHAse Diagrams) approach, incorporating a critical evaluation of all available phase diagram data and thermodynamic properties. The experimental results were successfully reproduced across the entire compositional range, yielding a self-consistent set of model parameters for both solid and liquid phases. The developed thermodynamic database was further applied to simulate synthesis conditions and evaluate the phase stability of calcium and magnesium vanadates, providing valuable insights into their potential application as LTCC materials.

Source: Materials & Design

DOI: 10.1016/j.matdes.2025.115302

Authors: Guishang Pei, Zhuoyang Li, Mengjiao Jiao, In-Ho Jung, Xuewei Lv

Institutions: Seoul National University, University of Warwick, Chongqing University

Language: English

Topic: Microwave Dielectric Ceramics Synthesis

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $3,650

Funder: National Natural Science Foundation of China