HIGH-FREQUEBNC HIGH-PERMEABILITY MAGNETIC MATERIAL

摘要

PURPOSE:To improve various magnetic characteristics including permeability in a high-frequency range by containing ZrO2 enhancing working characteristics and CaO as a low loss material into a fundamental composition composed of Fe2O3, ZnO and MnO and comprising at least one kind of TiO2 and SnO2 improving magnetic characteristics such as permeability in the high-frequency range. CONSTITUTION:50-65mol% Fe2O3, 5-30mol% ZnO and 10-40mol% MnO are used as a fundamental composition, and 0.01-0.2wt.% ZrO2 and 0.01-0.5wt.% CaO are contained while at least one kind of TiO2 and SnO2 is included at 0.01-0.3wt.%. An effect remarkable for improving the magnetic loss characteristics of a ferrite material is obtained because ZrO2 is contained, and low magnetic loss is acquired by including CaO into the fundamental composition of the ferrite material. At least one kind of TiO2 and SnO2 is added because magnetic characteristics more excellent than the single addition of CaO are obtained owing to composition addition with CaO.