4 ms·
Sapphire glass windows: they're good for up to 2000 C, mechanically strong and chemically resistant, and remarkably cheap.
by jjk166 2y ago
Sapphire glass windows: they're good for up to 2000 C, mechanically strong and chemically resistant, and remarkably cheap.
- ars 2y agoSapphire is Aluminum Oxide. Transparent Aluminum basically. It's an amazing material that is not used as much as it should be.