Often used to create prototype components, these ceramic rods come semi-fired so they can be machined using conventional metalworking tools.

Often used to create bearings, silicon-nitride ceramic is harder than many types of bearing steel but is lightweight and can be easily polished. It also withstands high temperatures.

Protectively sheath materials, such as thermocouples, that move between hot and cold environments. Similar to nonporous alumina tubes, air and gas cannot pass through these mullite tubes.