Crystallization-free glass frit compositions and frits made therefrom for microreactor devices

摘要

The invention is directed to a glass composition that can be used to make glass frits suitable for use in the manufacturing of microreactors. The glass compositions, after final sintering to produce a finished microreactor, have a surface crystalline layer of 30 mum or less, or are completely amorphous throughout. Generally, the borosilicate glasses of the invention have a composition of B₂O₃=12-22 mol %; SiO₂=68-80 mol % and additional components selected from the group consisting of either (a) Al₂O₃=3-8 mol % and Li₂O=1-8 mol %, or (b) K₂O=0-2 mol % and Na₂O=0-2 mol %, except that both K₂O and Na₂O cannot both equal zero at the same time. One borosilicate glass has a composition, in mole percent (mol %) of B₂O₃=18-22 mol %, SiO₂=75-80 mol %, K₂O=0-2 mol %, and Na₂O=0-2 mol %, except that both K₂O and Na₂O cannot both equal zero at the same time.