B_2O_3又はV_2O_5添加によるMgTiO_3-CaTiO_3系マイクロ波誘電体の低温焼成化

概要

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Dielectric property and sinterability of 0.95MgTiO_3・0.05CaTiO_3 modified with B_2O_3 or V_2O_5 were inverstigated. Addition of B_2O_3 decreased the firing temperature and did not affect dielectric property. On the other hand, addition of V_2O_5 also decreased the sintering temperature more extensively than B_2O_3, but influenced the dielectric property. The scanning electron microscopy(SEM)observation suggested that addition of B_2O_3 or V_2O_5 make a large amount of liquid phase. X-ray diffraction(XRD)analysis revealed that B_2O_3 decreases the MgTi_2O_5 phase, but that V_2O_5 increases both MgTi_2O_5 and Ca_5Mg_4V_6O_<24> phases. It is supposed that the liquid phase which was created by addition of B_2O_3 or V_2O_5, increased mainly sinterability at low firing temperature, but that addition of V_2O_5 also created the MgTi_2O_5 and Ca_5Mg_4V_6O_<24> phases during the sintering process, which decrease dielectric property seriously.
社団法人日本セラミックス協会の論文
1998-03-01