| 摘要 |
PURPOSE:To prepare the subject joined product prevented in the deterioration of magnetic characteristics thereof in improved joining, processing yields by subjecting a Mn-Zn ferrite single crystal and Mn-Zn ferrite multi-crystals to a solid reaction to form a directly joined product. CONSTITUTION:The joining surface of a Mn-Zn ferrite single crystal prepared by Bridgman method is subjected to a mirror surface processing in a surface roughness Rmax of approximately 1.0mum. The joining surface of Mn-Zn ferrite multi-crystals is also subjected to a mirror surface processing in a surface roughness Rmax of approximately 0.1mum, the Mn-Zn ferrite multi-crystals being prepared by grinding the same calcination product as the Mn-Zn ferrite single crystal and subsequently treating the ground product by a hot hydrostatic pressure method. The Mn-Zn ferrite single crystal and the Mn-Zn ferrite multi- crystals are superimposed on each other between the joining surfaces thereof, embedded in a mixture of the Mn-Zn ferrite powder and alumina powder, subjected to a pressure of >=2kg/cm<2> and simultaneously thermally treated at a temperature of <= the component of the hot hydrostatic pressure pressing for the solid phase reaction therebetween to directly join to each other. |
