Borosilicate glass

Question 1

What are the characteristics of borosilicate glass?

Answer 1

~ B2O3 added in lieu of Na2O

~ glass melts at temps near those of soda lime, but lower alkali content = chemical durability (Na+ tied up as CHARGE COMPENSATORS)

~ composition is selected to be at the CTE MINIMUM fo the borate anomaly

~ good thermal shock resistance

Question 2

What is borosilicate glass known as?

Answer 2

~ pyrex

~ used in cooking/baking ware

~ used at Savannah River site