Role of lithium borosilicate glass in the decomposition of MgTiO3-based dielectric ceramic during sintering |
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| Affiliation: | 1. School of Materials Science & Engineering, Seoul National University, Seoul 151-744, Republic of Korea;2. Department of Ceramic Engineering, Kangnung National University, Kangnung 210-702, Republic of Korea;1. Laboratory of Advanced Science and Technology for Industry, University of Hyogo, Koto, Kamigori, Ako, Hyogo 678-1205, Japan;2. Department of Physics, Keio University, Hiyoshi, Yokohama, Kanagawa 223-8522, Japan;1. College of Liberal Arts, Semyung University, Chechon, Chungbuk, 27136, South Korea;2. College of Nanoscience and Nanotechnology, Pusan National University, Busan, 46241, South Korea;3. Department of Physics, Gurukula Kangri Vishwavidyalaya, Haridwar, 249 404, India;1. Dipartimento di Fisica “E. R. Caianiello”, Università di Salerno and CNISM, Unità di Salerno, I-84084 Fisciano, Salerno, Italy;2. Dipartimento di Fisica, Università di Napoli Federico II, I-80125 Napoli, Italy |
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| Abstract: | The decomposition behaviour of 0.9MgTiO3–0.1CaTiO3 dielectric ceramic during a liquid phase sintering by lithium borosilicate (LBS) glass was studied. The decompositions of MgTiO3 into MgTi2O5 and Mg2TiO4 were apparent during the sintering although the reactions are thermodynamically unfavourable in glass-free compositions. The role of the LBS glass in favouring the decomposition reaction was investigated in terms of the thermodynamic activity of the reaction product in the glass. The decomposition reactions were not necessarily harmful because of the high dielectric performance of the decomposition products, MgTi2O5 (17.4 permittivity; 47,000 GHz quality factor) and Mg2TiO4 (14.4 and 55,000 GHz, respectively). |
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