Low-loss ferrite

Abstract

Abstract PURPOSE:To reduce loss, in particular, in the regions above 100kHz by using Fe2O3, ZnO, MnO as main ingredients and a predetermined amount of CaO, SiO2, ZrO2, SnO2 and/or TiO2 as sub-ingredients and by adding them. CONSTITUTION:Main ingredients are 50 to 60mole% Fe2O3 and 10 to 15mole% ZnO. The remaining part is MnO and additives of 0.08 to 0.40mole% CaO, 0.01 to 0.2mole% SiO2, 0.01 to 0.10mole% SiO2 and 0.05 to 1.0mole% SnO2 and/or TiO2. It is subjected to a normal ferrite manufacture and reaction and granulation are performed. After it is molded and pressed, it is sintered at a predetermined O2 partial pressure. With this constitution, a magnetic material having low loss, in particular, in the high-frequency regions above 100kHz can be obtained.

Inventors

• 👤 Gen Fukushima
• 👤 弦 福嶋
• 👤 Norio Sasaki
• 👤 佐々木　教雄

Bibliographic Details