| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a technique for improving a sintering density with gaining an effect of carbon addition. <P>SOLUTION: The method for manufacturing an oxide sintered compact comprises a forming process of forming a mixture containing a raw material powder, a carbon powder and a polycarboxylic acid-based dispersant and a sintering process of sintering a formed body obtained and of giving a sintered compact. The polycarboxylic acid-based dispersant suppresses the segregation of the carbon powder, so that the increase in pinholes and the decrease in the sintering density caused thereby may be suppressed even if the carbon powder vanishes at the time of sintering. Consequently, the segregation of the carbon powder can be suppressed and a high density, oxide sintered compact can be obtained with gaining an effect of the carbon addition. Being applied to a W-type ferrite magnet, the W-type ferrite magnet with a high remanent magnetic flux density (Br) can be obtained. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
