Patent ID: 8162005

Claim:
A crystallization-resistant zirconium- and alumina-containing silicate glass for use as a frit with refractory materials such as alumina, the glass comprising a composition in mole percent (mol %) of: 2<B 2 O 3 <7 mol % 75<SiO 2 <80 mol % 3<Al 2 O 3 <5 mol % 2<ZrO 2 <5 mol % 9<Na 2 O+K 2 O<15 mol % 0<alkali earth+lanthanide≦1.96 mol % and wherein the total mole percent of SiO 2 , Al 2 O 3 and ZrO 2 together is greater than 82 but less than 86, and wherein the total mole percent of B 2 O 3 , Na 2 O, K 2 O, alkali earths and lanthanides together is greater than 13 and less than 18.