Low-temperature sintering method for NiCuZn ferrite and effect of Mn addition on electromagnetic properties

Ferro-materials which possess both capacitance and inductance were sintered at low temperature using Bi2O3 as sintering additives. The composition of ferro-materials is 0.4PMZNT- 0.6NiCuZn. PMZNT relaxor ferroelectric is a solid solution that consists of Pb(Mg1/3Nb2/3)O3, Pb(Zn1/3Nb2/3)O3 and PbTiO3. NiCuZn ferrite with general formula is Ni0.2Cu0.2Zn0.6Fe2O4. Effects of the content of Bi2O3 and sintering temperature on the relative density of prepared ferro-materials have been studied. Dense ferro-materials were obtained at as low as 890°C with 2.0 wt% of Bi2O3. The X-ray diffractometer (XRD) identifications showed that ferro-materials consisted of distinct ferroelectric and ferromagnetic phases. Scanning electron microscopy (SEM) observations revealed that low temperature sintered ferro-materials possess high density and fine-grained microstructures. Prepared ferro-materials exhibit electromagnetic properties.

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Electromagnetic properties of low-temperature co-fired xPZT+(1−x)NiCuZn–ferrite composites

Journal of Magnetism and Magnetic Materials ◽

10.1016/j.jmmm.2009.04.054 ◽

2009 ◽

Vol 321 (18) ◽

pp. 2936-2940 ◽

Cited By ~ 8

Author(s):

Lijun Jia ◽

Tao Li ◽

Huaiwu Zhang ◽

Hui Zhong ◽

Yingli Liu ◽

...

Keyword(s):

Low Temperature ◽

Electromagnetic Properties ◽

Nicuzn Ferrite ◽

Ferrite Composites

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Low Temperature Sintering of SrZn2W - type Ferrites by Spark Plasma Sintering Method and Evaluation of Their Magnetic Properties

Journal of the Japan Society of Powder and Powder Metallurgy ◽

10.2497/jjspm.60.121 ◽

2013 ◽

Vol 60 (3) ◽

pp. 121-127

Author(s):

Yusuke RYOSHI ◽

Takashi NAKAGAWA ◽

Yoshinori KOBAYASHI ◽

Satoshi SEINO ◽

Takao A YAMAMOTO

Keyword(s):

Magnetic Properties ◽

Low Temperature ◽

Spark Plasma Sintering ◽

Low Temperature Sintering ◽

Plasma Sintering ◽

Spark Plasma ◽

Sintering Method

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Low-Temperature Sintering and Electromagnetic Properties Evaluation of (Ni/Mn)CuZn Ferrite

Materials Science Forum ◽

10.4028/www.scientific.net/msf.534-536.557 ◽

2007 ◽

Vol 534-536 ◽

pp. 557-560

Author(s):

Dong Ying Ju ◽

Pei Bian

Keyword(s):

Low Temperature ◽

Boric Acid ◽

High Strength ◽

Electromagnetic Properties ◽

Sintered Body ◽

Precipitation Method ◽

Ferrite Powder ◽

Low Temperature Sintering ◽

Co Precipitation ◽

Co2 Atmosphere

Low temperature sintering (Ni/Mn)CuZn ferrite was employed at most cases due to its co-firability with Ag (below 960 °C).The purpose of this study is to fabricate (Ni/Mn)CuZn ferrite sintered body with high-strength and high-frequency magnetic properties. Following is the procedure: firstly, (Ni/Mn)CuZn ferrite powder was synthesized under CO2 atmosphere at 500 °C from the mixed doxalate synthesized by co-precipitation method; then a small amount of boric acid [H3BO3] was added to the powder, and the (Ni/Mn)CuZn ferrite powder compact was prepared with Newton press and CIP methods; finally, (Ni/Mn)CuZn ferrite sintered body was fabricated by sintering at 900 °C under CO2 atmosphere. By this method, NiCuZn and MnCuZn ferrite sintered bodies with 0.5 mass% boric acid were obtained, the strength are 430 and 530 MPa respectively. The effect of various Mn addition on NiCuZn electromagnetic properties were studied.

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