Material: cordierite, mullite, corundum Variety of size, channels and hole diameter Apply ... , energy conserving result and service life are improved greatly.Material: cordierite, mullite, alumina, corundum and corundum mullite.1. Chemical compound: ContentMulliteCordieriteCorundumSiO225 ... .0Highest Working Temperature(°C)155013501600 Honeycomb ceramic regenerator for steel heater