BaCo<sub>0.06</sub>Bi<sub>0.94</sub>O<sub>3</sub>-Doped NiZn Ferrites for High Frequency Low Loss Current Sensors: LTCC Sintering and Magnetic Properties

BaCo<sub>0.06</sub>Bi<sub>0.94</sub>O<sub>3</sub>-Doped NiZn Ferrites for High Frequency Low Loss Current Sensors: LTCC Sintering and Magnetic Properties

In order to meet the demand for high-frequency current sensors in 5G communication and new energy fields, there is an urgent need to develop high-performance nickel-zinc ferrite-based co-fired ceramic magnetic cores. In this study, a nickel-zinc ferrite core based on low temperature co-fired ceramic...

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Bibliographic Details
Main Authors: Shao-Pu Jiang, Chang-Lai Yuan, Wei Liu, Lin Li, Huan Li, Jing-Tai Zhao
Format: Article
Language:English
Published: MDPI AG 2025-04-01
Series:Sensors
Subjects:
NiZn ferrites
current sensor
magnetic properties
LTCC technology
Online Access:https://www.mdpi.com/1424-8220/25/9/2731
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Summary:In order to meet the demand for high-frequency current sensors in 5G communication and new energy fields, there is an urgent need to develop high-performance nickel-zinc ferrite-based co-fired ceramic magnetic cores. In this study, a nickel-zinc ferrite core based on low temperature co-fired ceramic (LTCC) technology was developed. The regulation mechanism of BaCo<sub>0.06</sub>Bi<sub>0.94</sub>O<sub>3</sub> doping on the low-temperature sintering characteristics of NiZn ferrites was systematically investigated. The results show that the introduction of BaCo<sub>0.06</sub>Bi<sub>0.94</sub>O<sub>3</sub> reduces the sintering temperature to 900 °C and significantly improves the density and grain uniformity of ceramics. When the doping amount is 0.75 wt%, the sample exhibits the lowest coercivity of 35.61 Oe and the following optimal soft magnetic properties: initial permeability of 73.74 (at a frequency of 1 MHz) and quality factor of 19.64 (at a frequency of 1 MHz). The highest saturation magnetization reaches 66.07 emu/g at 1 wt% doping. The results show that BaCo<sub>0.06</sub>Bi<sub>0.94</sub>O<sub>3</sub> doping can regulate the grain boundary liquid phase distribution and modulate the magnetocrystalline anisotropy, which provides an experimental basis and optimization strategy for the application of LTCC technology in high-frequency current sensors.
ISSN:1424-8220

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