#AvE #video about Samsung flip phones but mostly about Gorilla #glass. Mostly just a bunch of handwaving. But then he does a teardown of a flexible plastic OLED screen that folds in half, so it’s all good.
on 02024-06-25#paper from 02006 on foaming soda-lime glass into an 0.35 g/cc #glass-ceramic foam at 750° after hydrating the #glass powder (half less than 138 μm, a third less than 63 μm) in hot water at 200° for six hours. DOI 10.1016/j.jeurceramsoc.2005.07.041. #foam #materials
on 02023-03-09frits: #glass powder #materials for #ceramics
on 02017-03-11#PDF #paper on #TCE, thermal coefficients of expansion, of different kinds of #glass #materials; B₂O₃ and MgO are 0.33 ppm/K at human temperatures, silica is 2.67, PbO and TiO₂ are 13, CaO and Al₂O₃ are 17, K₂O is 28, Na₂O is 33. Also they did their own linear regression, giving rise to a hairier model that is apparently twice as accurate. PbO’s 13 compares favorably to (from other sources) carbon steel at 10.8, aluminum at 23.1, and concrete’s at 12, but of course enormous compared to invar at 1.2 or crystalline quartz at 0.33.
on 02017-02-23patent for sintering #glass #materials into #ceramics at only 750° by wetting 100-mesh soda-lime glass powder with PEG-8000 as a binder dissolved in isopropanol, drying it at 60°, dry-pressing it at 5000 psi (34 MPa) and then firing it. Apparently the absence of water in the process avoids foaming during firing. #patents
on 02017-02-09