Crystallizable glass and crystallized glass of Li2O-A12O3-SiO2 system and method for producing crystallized glass of Li2O-A12O3-SiO2 system
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United States of America Patent
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Issued Date -
Jul 20, 2006
app pub date -
May 4, 2005
filing date -
Jan 20, 2005
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A crystallizable glass of Li.sub.2O--Al.sub.2O.sub.3--SiO.sub.2 system is provided, which can be crystallized by a crystallization process at a lower temperature to produce crystallized glass of Li.sub.2O--Al.sub.2O.sub.3--SiO.sub.2 system with excellent thermal characteristics. The crystallizable glass and crystallized glass of Li.sub.2O--Al.sub.2O.sub.3--SiO.sub.2 system consist essentially of, by weight percentages, SiO.sub.2 - - - 58.0.about.66.0 wt % Al.sub.2O.sub.3 - - - 18.0.about.26.0 wt % ; Li.sub.2O - - - 3.5.about.5.5 wt %; TiO.sub.2 - - - 0.5.about.4.0 wt % ; ZrO.sub.2 - - - 0.5.about.3.0 wt %; P.sub.2O.sub.5 - - - 0.5.about.3.0 wt %; F - - - 0.1.about.1.0 wt %; B.sub.2O.sub.3 - - - 0.about.2.5 wt %; Na.sub.2O - - - 0.about.2.0 wt %; K.sub.2O - - - 0.about.2.0 wt %; MgO - - - 0.about.1.0 wt %; ZnO - - -0.5.about.3.0 wt % ; BaO - - - 0.about.2.5 wt % ; SrO - - - 0.3.about.3.0 wt % As.sub.2O.sub.3 - - - 0.4.about.1.5 wt % ; and Sb.sub.2O.sub.3- - -0.about.1.5 wt %. A method for producing a crystallized glass of Li.sub.2O--Al.sub.2O.sub.3--SiO.sub.2 system is also provided.
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