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Silicon Nitride (Si3N4) Pellet Pressing Die of 12mm I.D. for Hot Pressing up to 1000°C - DIE-12-SiN

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Item Number: DIE12SiN

DIE-12-SiN is the dry pressing die made of silicon nitride (Si3N4) with a pressure of 50MPa max. and  the working temperature of 1000°C Max


 Material  Made of high purity machinable alumina

The whole set  die includes
  • One sleeve dies with 30 mm O.D x  40mm H x 12 mm  ID
  • One pushing rod is  12 mm dia. 
  • One short bottom rod is included
  • Max. Working temperature and Max. pressure
    • 1000ºC in air < 5 minutes:  
    • 800  ºC  for continuous
  • Max. sustainable pressure is 60Mpa 
  • Two support alumina rods for top and bottom are available at extra cost ( $600 per pair  )
  • The alumina die is designed for YLJ-HP6  as the link below

Steps to make sample pellet

  • Mixing and grinding chemical powder by agate mortar
  • Calcine mixed the powder in a high temp furnace under suitable temperature
  • Grinding calcined powder again by mortar
  • Placing the two die inserts in the center hole of the die
  • Put calcined powder into the die inserts
  • Pressing sample by a pressing machine under suitable pressure
  • Take out pellet sample from the die by easily taking out and opening the split die inserts
  • Sintering the pellet under suitable temperature (optional)
  • Then, a new material sample is formed.
Instruction Video                           
  • Please must always wear protective goggles during operation !!!
  • The pressing die cannot be used for pressing powder with a particle size of < 30 microns. Small particles may slip into the gap between the pushing rod and steel sleeve and cause damages to the sleeve during the compression. Ball mill and sieve the powder and apply only the 32~75 microns powder to the pressing die to avoid damages. Please consider using the 3'' Dia. Sieve Set No.200&450 Mesh to separate the 32~75 microns particles from the powder clumps. Please clean the mold via ethanol after the completion of each experiment. ( Pic. 1)
  • You may use BN coating as mold release (Pic 2)
                 Pic 1 Pic 2
  • Please use alcohol to clean the pressing die every time before use and store it in a dry place.

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