| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a boron diffusing material which further extends a diffusible time after an oxidation treatment. <P>SOLUTION: The boron diffusing material is constituted by a ceramic sintered body in which there are contained Al<SB>2</SB>O<SB>3</SB>component, SiO<SB>2</SB>component and BN component. A total percentage content of the Al<SB>2</SB>O<SB>3</SB>component and the SiO<SB>2</SB>component is 20 to 80 mass%, a percentage content of the BN component is 20 to 80 mass%, a mole ratio of Al<SB>2</SB>O<SB>3</SB>/SiO<SB>2</SB>is 1.0 to 2.4, and an open pore ratio is 13 to 43%. Moreover, a method of manufacturing the boron diffusing material comprises the steps of carrying out a CIP forming of mixed powder including a mixture and/or a compound of 20 to 80 mass% containing the Al<SB>2</SB>O<SB>3</SB>component and the SiO<SB>2</SB>component in which the mole ratio of Al<SB>2</SB>O<SB>3</SB>/SiO<SB>2</SB>is 1.0 to 2.4, and a boron nitride of 20 to 80 mass%; and carrying out a sintering in non-oxidizing atmosphere. <P>COPYRIGHT: (C)2007,JPO&INPIT |
