(Click to enlarge image) ZRCI Zirconia Felt Type RS-ZFELT is a mechanically interlocked textile structure composed of 4-6 micron diameter yttria-stabilized zirconia fibers. It is designed for uses in extremely corrosive environments and high temperatures. The felt is 100% fibers and contains no binders. It undergoes no phase transitions on temperature cycling and is a very effective thermal insulator, capable of use at temperatures exceeding 2000°C (3632°F). The stabilized zirconia composition permits the advantage of fibrous insulations to be extended into temperature regimes well above the melting temperatures of silica and alumina insulation materials.