Quote:
Originally Posted by MikeG
I'm the author of the blog article posted earlier. My calculations in that report were very rough, I'll admit. However, the properties of these bbs so closely match that of glass, it's very hard for me to believe that they are not.[/uote]
I tried the materials search at MatWeb mentioned earlier with the parameters of:
Melting Point: 500C to 1800C
Density: 2.35g/cc to 2.45g/cc
and the only result I came up with was this glass:
http://www.matweb.com/search/DataShe...eddd3bf252322b
It is still possible that the BBs could be made up of a composite of other materials that do not fit into the parameters I searched for, but the simplest explanation is still that they are made of some type of glass. |
MikeG, while your argument may sound sound for your average joe, you're going to have problems convincing those who have done engineering degrees, in particular those with background in material science. The fact is, Bioval has stated that these BBB Max are made of 1) Resin 2) some form of hardening agent. Without knowing what base material it is you can't determine what material is.
For example, PVC with a hardening agent forms your hard, brittle PVC pipes. PVC with softening agents forms your gardening hose. Both will have different volume, density etc. but both are essentially PVC.
Another case in point:
http://www.google.com/patents?id=_OqkAAAAEBAJ&dq , where you have a biodegradable resin composite at 250C.