Preparation of Densified Fine-Grain High-Frequency MnZn Ferrite Using the Cold Sintering Process

Yao Ying; Linghuo Hu; Zhaocheng Li; Jingwu Zheng; Jing Yu; Wangchang Li; Liang Qiao; Wei Cai; Juan Li; Daxin Bao; Shenglei Che

doi:10.3390/ma16093454

Preparation of Densified Fine-Grain High-Frequency MnZn Ferrite Using the Cold Sintering Process

Materials (Basel). 2023 Apr 28;16(9):3454. doi: 10.3390/ma16093454.

Authors

Yao Ying^{1

2}, Linghuo Hu^{1

2}, Zhaocheng Li^{1

2}, Jingwu Zheng^{1

2}, Jing Yu^{1

2}, Wangchang Li^{1

2}, Liang Qiao^{1

2}, Wei Cai^{1

2}, Juan Li^{1

2}, Daxin Bao³, Shenglei Che^{1

2}

Affiliations

¹ College of Materials Science and Engineering, Zhejiang University of Technology, Hangzhou 310014, China.
² Research Center of Magnetic and Electronic Materials, Zhejiang University of Technology, Hangzhou 310014, China.
³ Hengdian Group DMEGC Magnetics Co., Ltd., Dongyang 322118, China.

Abstract

The densified MnZn ferrite ceramics were prepared using the cold sintering process under pressure, with an acetate ethanol solution used as the transient solvent. The effects of the transient solvent, the pressure and annealing temperature on the density, and the micromorphology and magnetic properties of the sintered MnZn ferrites were studied. The densified MnZn ferrite was obtained using the cold sintering process and its relative density reached up to 85.4%. The transient solvent and high pressure are essential to the cold sintering process for MnZn ferrite. The annealing treatment is indispensable in obtaining the sample with the higher density. The relative density was further increased to 97.2% for the sample annealed at 950 °C for 6 h. The increase in the annealing temperature reduces the power loss at high frequencies.

Keywords: MnZn ferrite; cold sintering process; high frequency; power loss.

Abstract

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