All fired silicon materials are more stable when they have been fired at least twice. If you make ceramics, you save all your failures to make grog, which is basically ceramic sand or dust. Mixed in with fresh clay it reduced the expansion ratio and the internal stresses.
Bottles with recycled material are more sturdy than those without. I don’t know how the process of bringing a bottle plant online works, but if it doesn’t include either buying grog from a supplier or feeding all the glass from the test runs into a hopper I would be very surprised.
I have never heard a physicist explain this phenomenon, but if you crush something it tends to break along the weakest points, so crushed silicon has selected out many of the weakest grains and left the strongest ones. Then either they continue to grow or they just increase the ratio of strong to weak.
All fired silicon materials are more stable when they have been fired at least twice. If you make ceramics, you save all your failures to make grog, which is basically ceramic sand or dust. Mixed in with fresh clay it reduced the expansion ratio and the internal stresses.
Bottles with recycled material are more sturdy than those without. I don’t know how the process of bringing a bottle plant online works, but if it doesn’t include either buying grog from a supplier or feeding all the glass from the test runs into a hopper I would be very surprised.
I have never heard a physicist explain this phenomenon, but if you crush something it tends to break along the weakest points, so crushed silicon has selected out many of the weakest grains and left the strongest ones. Then either they continue to grow or they just increase the ratio of strong to weak.