This is a NEWSIC (high-strength, dense SiC-based ceramics) that fills the pores of silicon carbide with metallic silicon and keeps the porosity as close as possible to zero.
It has a high far infrared emissivity and is close to a full black body, so when used as a radiator, it has a high heating efficiency.
Specifications
Size (mm): 100 x 100 x 1.7
Weight (g): 50
Number of pieces: 1
Chemical composition: SiC/80%, Si/20%
Heat-resistant temperature: 1350 degrees Celsius or lower (in air)