What are the manufacturing process steps of Microporous Glass?

(China Glass Network）

Microporous glass is a kind of granular porous glass, good rigidity, high mechanical strength, mainly for the production of high silica glass, used in biological engineering, genetic engineering, purification and curing enzyme and medicine. Its production process is as follows: the raw material silica, boric acid, anhydrous sodium carbonate for deployment, melting at 1200~1400 DEG C under high temperature, and then formed at 800~1100 DEG C temperature (such as pipe type, rod type, plate type, particle type, fiber type, etc.) under phase separation of sodium borate glass; second step heat treatment at the temperature of 500~650 DEG C, let it into Na2O - B2O3 and SiO2 phase of the glass containing. Boric acid and alkali metal oxide silicate glass phase and glass phase particle size of about the order of a few tens of angstroms, forming a fine structure of two kinds of glass are mixed; the third step treatment with hydrochloric acid and hot water at 90 DEG C, the soluble Na2O - B2O3 glass phase The remaining SiO2 becomes the main component of the microporous glass. The change of the heat treatment time and temperature can change the pore size, pore size and pore volume of the microporous glass according to the occasion and need, and make the pore size uniform pore glass.