| abstract |
Expanded perlite products having controlled particle size distribution, methods of producing the expanded perlite products, and methods of use there of are provided. The expanded perlite product has, for example, a low ratio of standard deviation of particle size distribution to median particle size (fo r example, less than 0.63) and low median particle size (for example, less tha n 50 microns). The expanded perlite product may be used in a variety of applications including filter applications. |