Items Needed:

• Kiln / Sintering Furnace
• Refractory Container (Crucible)
• Sintering Refractory Ballast: AI₂O₃ & Magnesium Silicate with Sintering Carbon

Pack:

• BC1: Place AI₂O₃ refractory in the crucible
• BC2: Bury the print in the AI₂O₃, centered in the crucible
• BC3: Tamp down and pat the sides of the crucible
• BC4: Part should be surrounded by refractory
• BC5: Keep at least 15mm between the part and the crucible walls and top of refractory
• BC6: Put the crucible in the kiln

Debind:

• BC7: Ramp furnace at a rate of 55.6°C (100°F) per hour to 482°C (900°F)
• BC8: Hold at 482°C (900°F) for 4 hours*
• BC9: Let furnace cool to room temperature

Apply Sintering Carbon:

• BC10: Turn off the kiln and unplug it to cut the power
• BC11: Remove the part and refractory from the crucible
• BC12: Place Magnesium Silicate refractory in the now empty crucible
• BC13: Bury the part in the Magnesium Silicate, centered in the crucible, leaving at least 25mm empty at the top of the crucible
• BC14: Tamp down and pat the sides of the crucible
• BC15: Part should be surrounded by refractory
• BC16: Keep at least 15mm between the part and the crucible walls and top of refractory
• BC17: Fill up the whole 25mm of space on the top with the Sintering Carbon
• BC18: If possible, place a cover over the crucible – Don’t seal it (the cover can be tool wrap, ceramic or kiln paper. It is used to preserve Sintering Carbon.)
• BC19: Put the crucible back in the kiln

Sinter:

• BC20: Ramp furnace at a rate of 111.1°C (200°F) per hour to the Sinter Temp (chart below)
• BC21: Hold at the Sinter Temp for 5 hours

Cool Down:

• BC22: Program ends – let furnace cool to room temp from Sinter Temp

*Hold times listed are ideal for a part that is less than a 50mm cube. Hold longer for larger or very thick parts and/or larger crucibles.
Experiment with hold times if the parts are not sintered correctly.
Expected shrinkage with these instructions is 7 – 10%.

Items Needed:

• Kiln / Sintering Furnace
• Refractory Container (Crucible)
• Sintering Refractory Ballast: Steel Blend and Sintering Carbon

Pack:

• S1: Place Steel Blend refractory in crucible
• S2: Bury the print in the Steel Blend
• S3: Tamp down, don’t pack or smoosh
• S4: Leave about 40mm of room on top
• S5: Part should be surrounded by refractory
• S6: Keep at least 15mm between the part and the crucible walls and top of refractory
• S7: Put the crucible in the kiln

Debind:

• S8: Ramp furnace to 204°C (400°F) over the course of 2 hours.
• S9: Hold at 204°C (400°F) for 2 hours*
• S10: Over the course of 2 hours, ramp to 427°C (800°F)
• S11: Hold at 427°C (800°F) for 2 hours*
• S12: Let furnace cool to room temperature

Sinter:

• S13: Fill the space at the top of the crucible with Sintering Carbon
• S14: Ramp furnace to 593°C (1100°F) as fast as it will go
• S15: Hold at 593°C (1100°F) for 2 hours*
• S16: Over the course of 2 hours, ramp to Sinter Temp (chart below)
• S17: Hold at Sinter Temp for 4 hours*

Cool Down:

• S18: Over the course of 6 hours, ramp down to 593°C (1100°F) – do not hold
• S19: Program ends. Let furnace cool to room temp from 593°C (1100°F)

*Hold times listed are ideal for a part that is less than a 50mm cube. Hold longer for larger or very thick parts and/or larger crucibles.
Experiment with hold times if the parts are not sintered correctly.
Expected shrinkage with these instructions is 10%.

Items Needed:

• Kiln / Sintering Furnace
• Refractory Container (Crucible)
• Sintering Refractory Ballast: Steel Blend and Sintering Carbon

Pack:

• S1: Place Steel Blend refractory in crucible
• S2: Bury the print in the Steel Blend
• S3: Tamp down, don’t pack or smoosh
• S4: Leave about 40mm of room on top
• S5: Part should be surrounded by refractory
• S6: Keep at least 15mm between the part and the crucible walls and top of refractory
• S7: Put the crucible in the kiln

Debind:

• S8: Ramp furnace at 33°C (60°F)/hour to 204°C (400°F)
• S9: Hold at 204°C (400°F) for 2 hours*
• S10: Ramp furnace at 17°C (30°F)/hour to 427°C (800°F)
• S11: Hold at 427°C (800°F) for 6 hours*
• S12: Ramp furnace at 33°C (60°F)/hour to 538°C (1000°F)
• S13: Hold at 427°C (800°F) for 2 hours*
• 14: Let furnace cool to room temperature

Sinter:

• S15: Fill the space at the top of the crucible with Sintering Carbon
• S16: Ramp furnace at 333°C (600°F)/hour to 1260°C (2300°F)
• S17: Hold at 1260°C (2300°F) for 4 hours*

Cool Down:

• S18: Ramp furnace at 111°C (200°F)/hour to 593°C (1100°F) – Do not hold
• S19: Program ends. Let furnace cool to room temp from 593°C (1100°F)

TVF Webinar: Debinding and Sintering Filamet

Frequently Asked Sintering QuestionsText

How Much Will My Part Shrink During Debinding and Sintering?

Items Needed:

• Kiln / Sintering Furnace
• Refractory Container (Crucible)
• Sintering Refractory Ballast: AI₂O₃ or sand (The purpose of the refractory is to hold the part’s shape and any material that won’t burn up or deform in the temperatures listed below can be used.)

Pack:

• CC1: Place AI₂O₃ refractory in the crucible
• CC2: Bury the print in the AI₂O₃
• CC3: Tamp down, don’t pack or smoosh
• CC4: Part should be surrounded by refractory
• CC5: Keep at least 15mm between the part and the crucible walls and top of refractory
• CC6: Put the crucible in the kiln

Debind:

• CC7: Ramp furnace to 204°C (400°F)
• CC8: Hold at 204°C (400°F) for 2 hours*
• CC9: Over the course of 2 hours, ramp to 427°C (800°F)
• CC10: Hold at 427°C (800°F) for 3 hours*

Sinter:

• CC11: Over the course of 4 hours, ramp to the 649°C (1200°F) – do not hold
• CC12: Over the course of 5 hours, ramp to 1232°C (2250°F)
• CC13: Hold at 1232°C (2250°F) for 4 hours*

Cool Down:

• CC14: Program ends – let furnace cool to room temp

*Hold times listed are ideal for a part that is less than a 25mm cube. Hold longer for larger or very thick parts and/or larger crucibles
Experiment with hold times if the parts are not sintered correctly.

IItems Needed:

• Kiln / Sintering Furnace
• Refractory Container (Crucible)
• Sintering Refractory Ballast: Magnesium Silicate

Pack:

• PB1: Place Magnesium Silicate refractory in the crucible
• PB2: Bury the print in the Magnesium Silicate
• PB3: Tamp down, don’t pack or smoosh
• PB4: Part should be surrounded by refractory
• PB5: Keep at least 15mm between the part and the crucible walls and top of refractory
• PB6: Put the crucible in the kiln

Debind:

• PB7: Ramp furnace to 204°C (400°F)
• PB8: Hold at 204°C (400°F) for 2 hours*
• PB9: Over the course of 2 hours, ramp to 427°C (800°F)
• PB10: Hold at 427°C (800°F) for 3 hours*

Sinter:

• PB11: Over the course of 5 hours, ramp to 843°C (1550°F)
• PB12: Hold at 843°C (1550°F) for 3 hours

Cool Down:

• PB13: Program ends – let furnace cool to room temp from Sinter Temp

*Hold times listed are ideal for a part that is less than a 25mm cube. Hold longer for larger or very thick parts and/or larger crucibles
Experiment with hold times if the parts are not sintered correctly.
Expected shrinkage with these instructions is about 25%.