Porcelain desiccator plates, small perforations

NB.43

Chemical porcelain has an average coefficient of expansion from 20℃ to 200℃ is 3.56 x 10^-6, gradually increasing to 4.69 x 10^-6 at 1000℃. To prevent thermal stress cracks on porcelain ware it is strongly recommended a heating/cooling rate not to exceed 200℃/hour. The desiccator plate has Small perforations throughout the plate, and one large hole in center. The plate is glazed on one side and is without feet.

Refractory Qualities
Fusion point: 1670℃
Softening point: 1400℃
Limit of use, unglazed: 1400℃
Limit of use, glazed: 1150℃
Limit of use, evacuated: 1300℃

Coorstek 60452

1 mm , small
23 mm , center

190 mm