Synthesis of copper spinels by microwave irradiation

Jun Fukushima; Hirotsugu Takizawa; Yamato Hayashi

doi:10.1002/9781119183860.ch4

Synthesis of copper spinels by microwave irradiation

Jun Fukushima, Hirotsugu Takizawa, Yamato Hayashi

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

Abstract

CuFe₂O₄ was synthesized by microwave irradiation and conventional processing. In addition, microwave H-field annealing was conducted in order to investigate the effect of a magnetic field on tetragonal CuFe₂O₄. The sample synthesized with microwave E-field irradiation was cubic CuFe₂O₄, had a small saturation magnetization, and the same coercivity as that produced by conventional heating. In contrast, the sample synthesized with H-field irradiation had a larger saturation magnetization and a smaller coercivity than the sample synthesized by conventional heating. After H-field annealing, the sample had a large amount of cubic CuFe₂O₄ phase that consists of small crystallites. Moreover, the saturation magnetization increased and the coercivity decreased. These results suggest that microwaves lead to a reduction in the Jahn-Teller distortion and the magnetic property changes accordingly. It is concluded that microwaves affect the Jahn-Teller distortion of CuFe₂O₄ and the effect leads to changes in the phase and magnetic properties.

Original language	English
Title of host publication	Processing and Properties of Advanced Ceramics and Composites VII
Editors	Morsi M. Mahmoud, Amar Bhalla, Narottam P. Bansal, J. P. Singh, Ricardo H. R. Castro, Navin Jose Manjooran, Gary Pickrell, Sylvia Johnson, Geoff Brennecka, Gurpreet Singh, Dongming Zhu
Publisher	American Ceramic Society
Pages	33-41
Number of pages	9
ISBN (Electronic)	9781119183877
DOIs	https://doi.org/10.1002/9781119183860.ch4
Publication status	Published - 2015
Event	Processing and Properties of Advanced Ceramics and Composites VII - Materials Science and Technology 2014 Conference, MS and T 2014 - Pittsburgh, United States Duration: 2014 Oct 12 → 2014 Oct 16

Publication series

Name	Ceramic Transactions
Volume	252
ISSN (Print)	1042-1122

Conference

Conference	Processing and Properties of Advanced Ceramics and Composites VII - Materials Science and Technology 2014 Conference, MS and T 2014
Country/Territory	United States
City	Pittsburgh
Period	14/10/12 → 14/10/16

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10.1002/9781119183860.ch4

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Fukushima, J., Takizawa, H., & Hayashi, Y. (2015). Synthesis of copper spinels by microwave irradiation. In M. M. Mahmoud, A. Bhalla, N. P. Bansal, J. P. Singh, R. H. R. Castro, N. J. Manjooran, G. Pickrell, S. Johnson, G. Brennecka, G. Singh, & D. Zhu (Eds.), Processing and Properties of Advanced Ceramics and Composites VII (pp. 33-41). (Ceramic Transactions; Vol. 252). American Ceramic Society. https://doi.org/10.1002/9781119183860.ch4

Fukushima, Jun ; Takizawa, Hirotsugu ; Hayashi, Yamato. / Synthesis of copper spinels by microwave irradiation. Processing and Properties of Advanced Ceramics and Composites VII. editor / Morsi M. Mahmoud ; Amar Bhalla ; Narottam P. Bansal ; J. P. Singh ; Ricardo H. R. Castro ; Navin Jose Manjooran ; Gary Pickrell ; Sylvia Johnson ; Geoff Brennecka ; Gurpreet Singh ; Dongming Zhu. American Ceramic Society, 2015. pp. 33-41 (Ceramic Transactions).

@inproceedings{8e97e1b19d4144c8b901463d730f98b8,

title = "Synthesis of copper spinels by microwave irradiation",

abstract = "CuFe2O4 was synthesized by microwave irradiation and conventional processing. In addition, microwave H-field annealing was conducted in order to investigate the effect of a magnetic field on tetragonal CuFe2O4. The sample synthesized with microwave E-field irradiation was cubic CuFe2O4, had a small saturation magnetization, and the same coercivity as that produced by conventional heating. In contrast, the sample synthesized with H-field irradiation had a larger saturation magnetization and a smaller coercivity than the sample synthesized by conventional heating. After H-field annealing, the sample had a large amount of cubic CuFe2O4 phase that consists of small crystallites. Moreover, the saturation magnetization increased and the coercivity decreased. These results suggest that microwaves lead to a reduction in the Jahn-Teller distortion and the magnetic property changes accordingly. It is concluded that microwaves affect the Jahn-Teller distortion of CuFe2O4 and the effect leads to changes in the phase and magnetic properties.",

author = "Jun Fukushima and Hirotsugu Takizawa and Yamato Hayashi",

note = "Publisher Copyright: Copyright {\textcopyright} 2015 by the American Ceramic Society. All rights reserved.; Processing and Properties of Advanced Ceramics and Composites VII - Materials Science and Technology 2014 Conference, MS and T 2014 ; Conference date: 12-10-2014 Through 16-10-2014",

year = "2015",

doi = "10.1002/9781119183860.ch4",

language = "English",

series = "Ceramic Transactions",

publisher = "American Ceramic Society",

pages = "33--41",

editor = "Mahmoud, {Morsi M.} and Amar Bhalla and Bansal, {Narottam P.} and Singh, {J. P.} and Castro, {Ricardo H. R.} and Manjooran, {Navin Jose} and Gary Pickrell and Sylvia Johnson and Geoff Brennecka and Gurpreet Singh and Dongming Zhu",

booktitle = "Processing and Properties of Advanced Ceramics and Composites VII",

}

Fukushima, J , Takizawa, H & Hayashi, Y 2015, Synthesis of copper spinels by microwave irradiation. in MM Mahmoud, A Bhalla, NP Bansal, JP Singh, RHR Castro, NJ Manjooran, G Pickrell, S Johnson, G Brennecka, G Singh & D Zhu (eds), Processing and Properties of Advanced Ceramics and Composites VII. Ceramic Transactions, vol. 252, American Ceramic Society, pp. 33-41, Processing and Properties of Advanced Ceramics and Composites VII - Materials Science and Technology 2014 Conference, MS and T 2014, Pittsburgh, United States, 14/10/12. https://doi.org/10.1002/9781119183860.ch4

Synthesis of copper spinels by microwave irradiation. / Fukushima, Jun ; Takizawa, Hirotsugu ; Hayashi, Yamato.
Processing and Properties of Advanced Ceramics and Composites VII. ed. / Morsi M. Mahmoud; Amar Bhalla; Narottam P. Bansal; J. P. Singh; Ricardo H. R. Castro; Navin Jose Manjooran; Gary Pickrell; Sylvia Johnson; Geoff Brennecka; Gurpreet Singh; Dongming Zhu. American Ceramic Society, 2015. p. 33-41 (Ceramic Transactions; Vol. 252).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

TY - GEN

T1 - Synthesis of copper spinels by microwave irradiation

AU - Fukushima, Jun

AU - Takizawa, Hirotsugu

AU - Hayashi, Yamato

PY - 2015

Y1 - 2015

N2 - CuFe2O4 was synthesized by microwave irradiation and conventional processing. In addition, microwave H-field annealing was conducted in order to investigate the effect of a magnetic field on tetragonal CuFe2O4. The sample synthesized with microwave E-field irradiation was cubic CuFe2O4, had a small saturation magnetization, and the same coercivity as that produced by conventional heating. In contrast, the sample synthesized with H-field irradiation had a larger saturation magnetization and a smaller coercivity than the sample synthesized by conventional heating. After H-field annealing, the sample had a large amount of cubic CuFe2O4 phase that consists of small crystallites. Moreover, the saturation magnetization increased and the coercivity decreased. These results suggest that microwaves lead to a reduction in the Jahn-Teller distortion and the magnetic property changes accordingly. It is concluded that microwaves affect the Jahn-Teller distortion of CuFe2O4 and the effect leads to changes in the phase and magnetic properties.

AB - CuFe2O4 was synthesized by microwave irradiation and conventional processing. In addition, microwave H-field annealing was conducted in order to investigate the effect of a magnetic field on tetragonal CuFe2O4. The sample synthesized with microwave E-field irradiation was cubic CuFe2O4, had a small saturation magnetization, and the same coercivity as that produced by conventional heating. In contrast, the sample synthesized with H-field irradiation had a larger saturation magnetization and a smaller coercivity than the sample synthesized by conventional heating. After H-field annealing, the sample had a large amount of cubic CuFe2O4 phase that consists of small crystallites. Moreover, the saturation magnetization increased and the coercivity decreased. These results suggest that microwaves lead to a reduction in the Jahn-Teller distortion and the magnetic property changes accordingly. It is concluded that microwaves affect the Jahn-Teller distortion of CuFe2O4 and the effect leads to changes in the phase and magnetic properties.

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EP - 41

BT - Processing and Properties of Advanced Ceramics and Composites VII

A2 - Mahmoud, Morsi M.

A2 - Bhalla, Amar

A2 - Bansal, Narottam P.

A2 - Singh, J. P.

A2 - Castro, Ricardo H. R.

A2 - Manjooran, Navin Jose

A2 - Pickrell, Gary

A2 - Johnson, Sylvia

A2 - Brennecka, Geoff

A2 - Singh, Gurpreet

A2 - Zhu, Dongming

PB - American Ceramic Society

T2 - Processing and Properties of Advanced Ceramics and Composites VII - Materials Science and Technology 2014 Conference, MS and T 2014

Y2 - 12 October 2014 through 16 October 2014

ER -

Fukushima J , Takizawa H , Hayashi Y. Synthesis of copper spinels by microwave irradiation. In Mahmoud MM, Bhalla A, Bansal NP, Singh JP, Castro RHR, Manjooran NJ, Pickrell G, Johnson S, Brennecka G, Singh G, Zhu D, editors, Processing and Properties of Advanced Ceramics and Composites VII. American Ceramic Society. 2015. p. 33-41. (Ceramic Transactions). doi: 10.1002/9781119183860.ch4

Synthesis of copper spinels by microwave irradiation

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