ผลการเจือสาร Nb และ Fe ที่มีผลต่อโครงสร้างผลึก สมบัติทางไฟฟ้าและสมบัติแม่เหล็กของเซรามิก BCTS ที่สังเคราะห์ด้วยวิธีการเผาไหม้ของแข็ง

Nathanan Reabreang; Chittakorn Kornphom; Sununta  Yimsabai; Surirat  Yotthuan; Supree  Pinitsoontorn; Theerachai  Bongkarn

doi:10.57260/stc.2026.1255

Authors

Nathanan Reabreang Department of General Sciences and Physics, Faculty of Science and Technology, Chiang Mai Rajabhat University
Chittakorn Kornphom Department of General Sciences and Physics, Faculty of Science and Technology, Chiang Mai Rajabhat University
Sununta Yimsabai Department of Physics, Faculty of Science, Naresuan University
Surirat Yotthuan Department of Science Service
Supree Pinitsoontorn Institute of Nanomaterials Research and Innovation for Energy (IN-RIE), Khon Kaen University
Theerachai Bongkarn Research Center for Academic Excellence in Applied Physics, Faculty of Science, Naresuan University

DOI:

https://doi.org/10.57260/stc.2026.1255

Keywords:

Piezoelectric ceramics, Multiferroic materials, Electrical properties, Magnetic properties, Solid-state reaction method

Abstract

This study investigates the effects of niobium (Nb) and iron (Fe) co-doping on lead-free Ba_0.945Ca_0.055(Ti_0.9946-xSn_0.0054)(Nb_0.5Fe_0.5)_xO₃ ceramics denoted as BCTS-xNF, where x = 0.00, 0.01, 0.02, and 0.03. The ceramics were synthesized using the solid-state combustion method. The objective of this work was to examine the influence of Nb and Fe co-doping on the crystal structure, microstructure, electrical properties, and magnetic properties of the ceramics. X-ray diffraction (XRD) analysis revealed that all samples exhibited a pure perovskite structure, with a structural transition from tetragonal to cubic symmetry as the doping concentration increased. Dielectric measurements indicated that the Curie temperature (T_C) decreased with increasing x, accompanied by a gradual weakening of ferroelectric properties. Microstructural analysis using scanning electron microscopy (SEM) showed that the sample with x = 0.02 possessed the largest average grain size and the highest density. Magnetic characterization performed using a vibrating sample magnetometer (vibrating sample magnetometer; VSM) demonstrated that Nb and Fe co-doping induced magnetic behavior in the BCTS ceramic system, with the x = 0.02 composition exhibiting the most pronounced magnetic response.

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