Evaluation of microwave absorption properties of CNT-containing alumina composites and its application as a heating medium for microwave-heated particle synthesis

Hirao, Kaito*; Segawa, Tomoomi ; Fukasawa, Tomonori*; Ishigami, Toru*; Prasetya, F. A.*; Ishii, Katsunori ; Kawaguchi, Koichi ; Kuo, H.-P.*; Huang, A.-N.*; Fukui, Kunihiro*

Experiments were conducted to synthesize nickel oxide (NiO) powder from aqueous Ni(NO $_{3}$ ) $_{2}$ $^{.}$ 6H $_{2}$ O via microwave denitration in the presence of a heating jacket as a microwave susceptor, which were fabricated using the CNT-containing alumina composites. The heating jacket containing CNTs effectively served as a susceptor and facilitated the microwave denitration reaction to proceed, yielding crystalline NiO particles. The heating jacket enabled the temperature of aqueous Ni(NO $_{3}$ ) $_{2}$ $^{.}$ 6H $_{2}$ O in the flask to continue increasing up to 500 $^{circ}$ C via heat conduction. In conclusion, CNT-containing alumina composites are potential materials for use as susceptors in hybrid heating.

Language	:	English
Journal	:	Advanced Powder Technology
Volume	:	36
Number	:	9
Pages	:	p.105008_1 - 105008_11
Publication Year/Month	:	2025/09
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Paper URL	:	https://doi.org/10.1016/j.apt.2025.105008
DOI for research data	:	Link to research data related to this paper/report.
Keywords	:	カーボンナノチューブ; マイクロ波加熱; 誘電特性
Research Facility	:	プルトニウム燃料製造施設
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Cooperating Institute	:	広島大学

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Registration No. : AA20250493
JAEA Abstracts No. : 54000109
Paper Submission No. : 30481

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