DURABLE FRIT COMPOSITION & COMPOSITES AND DEVICES COMPRISED THEREOF

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A zirconium- and alumina-containing silicate glass suitable for use as a frit with refractory materials such as alumina is disclosed, the silicate glass comprising a glass composition in mole percent (mol %) of : 2 < B2O3 < 7 mol % 75 < SiO2 < 80 mol % 3 < A12O3 < 5 mol % 2 < ZrO2 < 5 mol % 9 < Na2O + K2O < 15 mol % 0 < alkali earth + lanthanide < 15 mol % and wherein the total mole percent of SiO2, A1O3 and ZrO2 together is greater than 82 but less than 86, and wherein the total mole percent of B2O3, Na2O, K2O, alkali earths and lanthanides together is greater than 13 and less than 18. Frits (200, 600), composites (600) and micro fluidic devices (12) comprising the glass are also disclosed.