NONMAGNETIC OXIDE SUBSTRATE AND MAGNETIC HEAD USING SAME

摘要

PURPOSE:To make workability excellent and to lessen the amount of a change in the depth of a groove when V groove machining is conducted, by adding a specific amount of CuO to a base material of TiO2-NiO and by sintering the material thus prepared. CONSTITUTION:CuO of 0.2 to 5wt.% is added to a base composition of NiO of 60 to 86wt.% and Tie, of 14 to 40wt.%. CuO powder prepared by a means for powder metallurgy and NiO and TiO2 are weighed and mixed so that they are in a specific ratio, and then dried. Thereafter a polyvinyl alcohol water solution is added, granulation is made and pressure molding is conducted. A molded body thus prepared is sintered in air and further the sintered body is subjected to a hot isostatic process.