Millimeter-Wave Processing of LaCrO_3 and LaNiO_3 Perovskites Using 28 GHz Frequency(Millimeter-Wave Heating)(<Special Issue>Recent Trends on Microwave and Millimeter Wave Application Technology)
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概要
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Both Cr_2O_3 and NiO absorb 28GHz millimeter-wave energy well and this strong coupling with millimeter-waves can be used to promote a chemical reaction with La_2O_3 to form perovskite-type LaCrO_3 or LaNiO_3 ceramics. In La_2O_3Cr_2O_3 system, the reaction proceeded rapidly and single phase LaCrO_3 could be synthesized within 15 min even at lower temperature (〜400℃) as compared to conventional synthesis (T > 800℃). In the case of LaNiO_3, the reaction proceeded rapidly in the early stage of heating (t < 15 min), but not completed even after prolonged millimeter-wave irradiation. The results suggest an importance of millimeter-wave penetration depth, especially for processing of conductive materials.
- 社団法人電子情報通信学会の論文
- 2003-12-01
著者
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Takizawa Hirotsugu
Department Of Applied Chemistry Graduate School Of Engineering Tohoku University
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Takizawa Hirotsugu
Department Of Applied Chemistry Tohoku University
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Iwasaki Masato
Department Of Applied Chemistry Tohoku University:(present Address)r & D Center Ngk Spark Plug C
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Iwasaki Masato
Department Of Applied Chemistry Tohoku University
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