| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an Mn-Zn ferrite sintered body having a metal oxide insulated film which is dense, hard to peel and excellent in insulating property and handling property. <P>SOLUTION: In the ferrite sintered body, a CVD and MOD method is used for the Mn-Zn ferrite sintered body of a ring and E type, and at least one type of insulating oxide film out of Al<SB>2</SB>O<SB>3</SB>, amorphous-alumina and SiO<SB>2</SB>. The Mn-Zn ferrite sintered body heated at 773K or over in forming a film is cooled at a cooling speed of 0.01-30.0 K/min. The metal oxide is obtained by controlling the thickness of the metal oxide film to 0.01-30.0 μm and an amount of carbon C in the film to 10-1,000 ppm, and the Mn-Zn ferrite sintered body is coated with the metal oxide. <P>COPYRIGHT: (C)2004,JPO&NCIPI |
