| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a ceramic reduced in the releasing quantity of a gas in heating, to provide its manufacturing method, and to provide a boat which is long in service life and is composed of the ceramic. <P>SOLUTION: The ceramic contains 0.2 to 7.5 mass% strontium oxide and ≤0.8 mass% (not including 0%) boron oxide, comprises titanium diborate and boron nitride as main components and has ≥90% relative density. The method for producing the ceramic is carried out by forming mixed raw material powder comprising 40-60 mass% titanium diborate, 30-60 mass% boron nitride and 0.5-8.5 mass% strontium oxide having ≤10 μm average diameter and sintering the formed body at 1,700-2,200°C and ≥10 MPa pressure under a non-oxidizing atmosphere. A vessel for use in the vaporization of a metal is formed from the ceramic. <P>COPYRIGHT: (C)2008,JPO&INPIT |
