| http://www.w3.org/ns/prov#value | - The tubular body may be made of any ceramic material, including polycrystalline alumina (PCA), sapphire, single crystal yttria aluminum garnet (YAG) and polycrystalline YAG. The end structures are often sealed to this ceramic tubular body using a seal glass, which has physical and mechanical properties matching those of the ceramic components and the end structures.
|
