Microwave absorbing heating element NiMgCuZn ferrite powder and microwave absorbing heating element using the powder

摘要

PROBLEM TO BE SOLVED: To provide ferrite power for microwave absorption heating elements, which is excellent in heating performance up to a predetermined temperature, is capable of arbitrarily selecting a temperature rise stopping temperature in a wide range of 50 to 450°C and is inexpensive as compared with ferrite of conventional techniques.SOLUTION: NiMgCuZn ferrite powder containing predetermined amounts of iron oxide, copper oxide and zinc oxide is prepared as a composition in a range of 40 to 48 mol% in the total in terms of the amounts of ZnO, NiO and MgO, and in a triangle diagram setting the total amount of three components as 100, the composition is included within an area (provided that lines are not included) surrounded by (ZnO, NiO, MgO) = A(85, 15, 0), B(11, 89, 0), C(33, 0, 67), and D(67, 0, 33).