18887267. GLASS (AGC Inc.)
GLASS
Organization Name
Inventor(s)
Hirofumi Tokunaga of Tokyo (JP)
GLASS
This abstract first appeared for US patent application 18887267 titled 'GLASS
Original Abstract Submitted
A glass has a density of 2.60 g/cmor lower, a Young's modulus of 88 GPa or more, a strain point of 650 to 720° C., a temperature Tat which a glass viscosity reaches 10dPa·s of 1,320° C. or lower, a glass surface devitrification temperature (T) of T+20° C. or lower, and an average coefficient of thermal expansion of 30×10to 43×10/° C. at 50 to 350° C. The glass contains, as represented by mol % based on oxides, 50 to 80% of SiO, 8 to 20% of AlO, 0 to 0.5% in total of at least one kind of alkali metal oxide selected from the group consisting of LiO, NaO and KO, and 0 to 1% of PO.