| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a method for producing crystallized glass capable of adjusting a color tone easily by changing a crystallization condition, and hardly spoiling transmission characteristics of a visible ray or an infrared ray even when used for a long time, and to provide crystallized glass, and a top plate using the same. <P>SOLUTION: This method for producing crystallized glass includes: a mixing step for mixing raw material powder so as to obtain a composition containing, in terms of mass%, 55-73% SiO<SB POS="POST">2</SB>, 17-25% Al<SB POS="POST">2</SB>O<SB POS="POST">3</SB>, 2-5% Li<SB POS="POST">2</SB>O, 2.6-5.5% TiO<SB POS="POST">2</SB>, 0-0.9% SnO<SB POS="POST">2</SB>, 0.01-0.4% V<SB POS="POST">2</SB>O<SB POS="POST">5</SB>, and not containing substantially As<SB POS="POST">2</SB>O<SB POS="POST">3</SB>and Sb<SB POS="POST">2</SB>O<SB POS="POST">3</SB>; a precursor preparing step for preparing precursor glass by melting the raw material powder; and a crystal nucleus formation step for subjecting the precursor glass to heat treatment in a temperature zone of 660-700°C for 10 minutes to 10 hours. <P>COPYRIGHT: (C)2013,JPO&INPIT |
