| 摘要 |
PROBLEM TO BE SOLVED: To provide a ferrite sintered body which ensures a small rate of change in initial permeability in a wide temperature range (-40 to 125°C) and whose initial permeability is in a specific range (about 350 to 700).SOLUTION: A ferrite sintered body has a main component having a spinel structure and including iron oxide, zinc oxide, copper oxide and nickel oxide. The ferrite sintered body has an A phase and a B phase, wherein the A phase is a region in which a content (mol%) of FeOis larger than a content (mol%) of ZnO, and the B phase is a region in which a content (mol%) of FeOis not more than a content (mol%) of ZnO. When FeOin 100 mol% of the main component is represented by x (mol%) and the area ratio of the A phase to the total area of the A phase and the B phase is represented by y (%), (x, y) is within a quadrilateral having the following points A to D as apexes (including portions on the line). Point A (46, 97), point B (46, 83), point C (47.9, 70), point D (47.9, 85). |
