| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a method for manufacturing diamond particles for selectively removing impurities, in particular, carbon impurities such as a graphite component, an amorphous carbon component and a straight chain carbon component from diamond particles. <P>SOLUTION: The method for manufacturing diamond particles is characterized in that powder of diamond particles 2 is dispersed and heated in a nitric acid compound solution 24 to remove a carbon impurity layer 6 from the diamond particles 2. With nitrate ions in the nitric acid compound solution 24, impurities deposited on the surface of diamond particles 2, in particular, carbon impurities such as graphite can be removed with high efficiency. When the graphite component is decreased to ≤3% of the diamond component, preferably ≤1.5%, the manufactured high-purity diamond particles 5 can be used for an electric insulator or the like for circuit boards and semiconductors, and used not only for electronic parts but in various fields such as material technology, optics or the like. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
