Maria Borczuch-Laczka;Katharzyna Cholewa-Kowalska;Karolina Laczka
发明人:
Maria Borczuch-Laczka,Katharzyna Cholewa-Kowalska,Karolina Laczka
申请号：
US14111924
公开号：
US09260342B2
申请日:
2012.04.20
申请国别(地区):
US
年份:
2016
代理人:
摘要：
Process for preparing glass-ceramic body including the steps of providing a basic glass body and subjecting the basic glass body to a thermal treatment whereby a crystalline phase embedded in a glass matrix is formed. The basic glass body is made of a composition comprising 65 to 72 wt-% SiO2, at least 10.1 wt-% Li2O and at least 10.1 wt-% Al2O3 based on the total weight of the composition, the proportion of Li2O to Al2O3 being from 1:1 to 1.5:1. The thermal treatment involves a nucleation step followed by several crystallization steps at different temperatures, whereby at least two different crystalline phases are formed.
