(1-x-y)PMN-xPT-yPNW系を利用した温度安定性積層セラミックコンデンサーの製造

概要

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Multilayer ceramic capacitors (MLCCs) were fabricated by laminating layers with different Curie temperaturcs to improve the temperature coefficient of capacitance in the Pb(Mg_<1/3>Nb_<2/3>)O_3-PbTiO_3-Pb(Ni_<1/2>W_<1/2>)O_3 ternary system. A green sheet was prepared by tape casting using a mixture of Pb(Mg_<1/3>Nb_<2/3>)O_3, PbTiO_3 and PbO, NiO, WO_3, 80Ag-20Pd was attached on the green sheet as an internal electrode. The green sheets with the electrode were then laminated under 2.9×10^7 Pa at 70℃ and sintered at 1000℃ for 2 h. MLCCs with 11 layers of 0.85PMN-0.05PT-0.1PNW, 2 layers of 0.7PMN-0.2PT-0.1PNW and 4 layers of 0.6PMN-0.3PT-0.1PNW showed an improved temperature coefficient of capacitance (ΔC/C ; -13.26-3.85%) in the temperature range from -50 to 80℃.
社団法人日本セラミックス協会の論文
2003-03-01