Saggers are used to transport and protect sensitive products as they are heat-treated or fired in kilns. Saint-Gobain Performance Ceramics & Refractories’ saggers are specifically adapted to each heat treatment protocol and designed to minimize undesirable sagger-product reactions.

Features and Benefits

  • Available in a range of materials and shapes
  • Excellent thermal shock resistance
  • Shape stability and strength
  • Defined flatness and surface finish
  • High chemical stability
  • High corrosion resistance
Material Properties
 SiC-contentMax. Service TemperatureBulk DensityApparent Porosity Vol.Modolus of RuptureThermal Expansion αRT 1,100°C
Mulnorite® KN 176821,7002.7171055.3
Mullfrax® EM 27901,75031788170
Alundum® AH 191 A911,7502.9201477
AnnaCarbid® 42401,4302.52020105
AnnaCarbid® 65651,4502.52115155
AnnaCarbid® 94841,5002.51720205
NSiC 2165791,600 - 1,6502.721540504.5
NSiC 2172801,6002.651735454.5
AnnaSicon® RTH751,6502.631740354.5
Silit® SK851,380302602604.5
Silit® SKD851,380302602604.5
N-Durance®701,4502.75≤ 1170 - 180170 - 1904.4
Crystar® 2000 > 991,6002.71580904.8
Crystar® 3000> 971,6002.71580904.8
Hexoloy®> 991,7503.07< 0,63803704

Suitable for use in the electronics and semiconductors industry, automotive industry, and with lithium battery and cathode powder technology.


Various materials and shapes are available.


Can Saint-Gobain Performance Ceramics & Refractories’ saggers be employed in highly automated processes?

Yes. Saint-Gobain Performance Ceramics & Refractories’ experienced engineers are on hand to recommend the most ideal product and design option for a highly automated production line, taking into account factors such as the mechanical strength of the sagger (for robot handling) or advanced thermal shock resistance (for loading or unloading).

Can Saint-Gobain Performance Ceramics & Refractories’ saggers be stacked?

Yes. A customized sagger design allows them to be stacked in a kiln, increasing volume output.