White corundum 240 mesh powder is used as insulating powder for sintered ceramic sheets
Isolating powder for sintered ceramic sheets usually refers to the insulating material spread under the sagger during the firing process of sintered ceramic sheets. White corundum 240 mesh has obvious advantages in being used as insulating powder for sintered ceramic sheets. Its main features are as follows:
- High temperature stability: insulating powder needs to maintain good stability at high temperatures, be able to withstand high temperature environments, and will not melt or deform. Fused alumina 240 mesh is produced through a high-temperature fusion process, with a refractory temperature of up to 1800 degrees and high high temperature stability.
- Low viscosity: the viscosity of insulating powder should be low so that it can flow and cover the surface of sintered ceramic sheets to form a uniform insulating layer. The grading process of fused alumina 240 mesh is hydraulic grading, which has good fluidity and prevents alumina insulating powder from adhering to the ceramic surface.
- Anti-adhesion: insulating powder should be able to effectively prevent sintered ceramic sheets from adhering to trays or other contact objects to avoid deformation or breakage during firing. Alumina itself is chemically inert and will not react with ceramic sheets at high temperatures, so it has good anti-adhesion properties.
- Ceramic surface protection:Fused alumina 240# has high high-temperature corrosion resistance and has a certain protective effect, which can prevent the ceramic surface from oxidation, shedding or other damage at high temperatures.
- Easy to remove: After sintering, alumina isolation powder is easy to remove and will not remain on the surface of sintered ceramic sheets or affect subsequent processes.
In short, white corundum 240# is a very good alumina powder with high temperature resistance, wear resistance and good fluidity. As an isolation powder is one of its important uses.