Advanced Materials

High-Temperature Bogie Hearth Furnaces with SiC Rod Heating up to 1550 °C

WHTC 3300/15 WHTC 4000/15 with bogie on rails and fan cooling

SiC rod elements on both sides of the furnace

Design with two doors and two bogies, on rails, allows for rapid bogie changes

Bogie hearth furnaces equipped with SiC rod heating can be used in the production of technical ceramics, especially for sintering at working temperatures up to 1550 °C. The WHTC product line with especially robust design can hold heavy charges including kiln furniture. The furnace chamber is equipped with a high-quality insulation made of high-temperature fiber blocks. The bogie insulation is structured in multi-layer lightweight refractory bricks on the heating chamber side.

The furnace is heated along both sides by vertically installed SiC heating rods. This heating technology permits processes requiring working temperatures above 1350 °C which cannot achieved with wire heating elements. The SiC rods are controlled by thyristor controller which counteract the aging of the heating elements by means of automatic power compensation.

  • Tmax 1550  °C
  • Dual shell housing with rear ventilation, provides for low shell temperatures
  • Swing door hinged on the right side
  • Heating from both sides via vertically mounted SiC rods
  • Thyristor controllers with automatic output compensation counteract the aging of SiC rods
  • Multi-layer insulation with high-quality fiber modules on the heating chamber side
  • Bogie for heavy loads lined with lightweight refractory bricks
  • Bogie hand driven on rubber tires
  • Motor-driven exhaust air flap on the furnace roof
  • Over-temperature limiter with adjustable cutout temperature for thermal protection class 2 in accordance with EN 60519-2 as temperature limiter to protect the furnace and load
  • Defined application within the constraints of the operating instructions
  • NTLog Basic for Nabertherm Controller: Recording of process data with USB-flash drive

Additional equipment

  • Safety concepts
  • Exhaust air and exhaust gas piping
  • Thermal or catalytic exhaust cleaning systems
  • Process control and documentation via VCD software package or Nabertherm Control Center (NCC) for monitoring, documentation and control
 

High-Temperature Furnaces with SiC Rod Heating up to 1550 °C

HTC 40/16

Vertically mounted SiC rods and optional perforated air inlet tubes of the debinding system

Exhaust-air flap and charge thermocouple including a stand as additional equipment

HTC 16/16 - HTC 450/16

The high-temperature furnaces HTC 16/16 - HTC 450/16 are heated by vertically hung SiC rods, which makes them especially suitable for sintering processes up to a maximum operating temperature of 1550 °C. For some processes, e.g. for sintering zirconium oxide, the absence of interactivity between the charge and the SiC rods, these models are more suitable than the alternatives heated with molybdenum disilicide elements. The basic construction of these furnaces make them comparable with the already familiar models in the HT product line and they can be upgraded with the same additional equipment.

  • Tmax 1550  °C
  • Dual shell housing with fan cooling for low shell temperatures
  • Heating from both sides via vertically mounted SiC rods
  • High-quality fiber insulation backed by special insulation
  • Side insulation constructed with tongue and groove blocks provides for low heat loss to the outside
  • Long-life roof insulation with special suspension
  • Chain-guided parallel swivel door for defined opening and closing of the door without destroying the insulation
  • Two-door design (front/back) for high-temperature furnaces > HTC 276/..
  • Labyrinth sealing ensures the least possible temperature loss in the door area
  • Reinforced floor as protection for fiber insulation and to load heavy weights
  • Exhaust air opening in the furnace roof
  • Heating elements switched via SCR‘s
  • Over-temperature limiter with adjustable cutout temperature for thermal protection class 2 in accordance with EN 60519-2 as temperature limiter to protect the furnace and load
  • Defined application within the constraints of the operating instructions
  • NTLog Basic for Nabertherm Controller: Recording of process data with USB-flash drive

Additional equipment like HT models

ModelTmaxInner dimensions in mmVolumeOuter dimensions in mmHeatingElectricalWeight
 °Cwdhin lWDHpower in kW2connection*in kg
HTC 16/16 155020030026016810700150012,03-phase1270
HTC 40/161550300350350401000800162012,03-phase380
HTC 64/161550400400400641130900167018,03-phase550
HTC 128/16155040080040012811301290167026,03-phase750
HTC 160/16155050055055016012501050190021,03-phase800
HTC 276/161550500100055027613001600190036,03-phase1100
HTC 450/161550500115078045013501740212064,03-phase1500
1Heating only between two phases *Please see page 77 for more information about supply voltage
2Depending on furnace design connected load might be higher
 

High-Temperature Furnaces with Molybdenum Disilicide Heating Elements with Fiber Insulation up to 1800 °C

HT 160/17 DB200 HT 16/18 with gas supply system

Protection of heating elements against mechanical damage

Inner process hood with gas injection through the furnace bottom protects the furnace chamber against contamination and/or prevents chemical interaction between the charge and heating elements

HT 160/18 DB200 with pneumatically driven and parallel lift door

HT 64/17 DB100 with debinding package

Fresh air injection through perforated injection tubes with debinding package DB200

Display of pressure and volume flow with debinding package DB200

Two-door design for models > HT 276/..

Gas supply system for non-flammable protective or reaction gases

HT 04/16 - HT 450/18

The high-temperature furnaces HT 04/16 - HT 450/18 have proven reliability over many years in the lab and in the production of technical ceramics. Whether for bioceramics, for sintering CIM components or for other processes up to a maximum temperature of 1800 °C, these furnaces afford the optimal solution for the sintering process.

High-temperature furnaces can either be insulated with fiber material or lightweight refractory bricks. Furnaces with fiber insulation achieve significantly shorter heating up times because of the low thermal mass. An insulation made of lightweight refractory bricks (see HFL models on page 49), on the other hand, has the advantage of better chemical stability.

These furnaces can also be tailored to specific processes by means of a wide range of additional equipment. The addition of a debinding package, for example, allows the use of these models as combi furnaces for debinding and sintering in one process. Thermal or catalytic exhaust cleaning equipment rounds-off the system.

  • Tmax 1600  °C, 1750  °C or 1800  °C
  • Recommended working temperature 1750 °C (for models HT ../18), increased wear and tear must be expected in case of working at higher temperatures
  • Dual shell housing with fan cooling for low shell temperatures
  • Heating from both sides via molybdenum disilicide heating elements
  • High-quality fiber insulation backed by special insulation
  • Side insulation constructed with tongue and groove blocks provides for low heat loss to the outside
  • Long-life roof insulation with special suspension
  • Chain-guided parallel swivel door for defined opening and closing of the door
  • Two-door design (front/back) for high-temperature furnaces > HT 276/..
  • Labyrinth sealing ensures the least possible temperature loss in the door area
  • Reinforced floor as protection for fiber insulation as standard from models HT 16/16 upwards
  • Exhaust air opening in the furnace roof
  • Heating elements switched via thyristors
  • Over-temperature limiter with adjustable cutout temperature for thermal protection class 2 in accordance with EN 60519-2 as temperature limiter to protect the furnace and load
  • Defined application within the constraints of the operating instructions
  • NTLog Basic for Nabertherm Controller: Recording of process data with USB-flash drive

Additional equipment

  • Uncontrolled or controlled cooling system with frequency-controlled cooling fan and motor-driven exhaust air flap
  • Furnace in DB design featuring fresh air preheating, exhaust gas ventilation and an extensive safety package for debinding and sintering in one process, i. e. without transfering the material from the debinding furnace to the sintering furnace
  • Stainless steel exhaust gas hoods
  • Commissioning of the furnace with test firing and temperature uniformity measurement (also with load) for the purpose of process optimization
  • Temperature measurement with thermocouples, types B and type S with automatic pull-out device for precise control results in the low temperature range
  • Protection grid in front of the heating elements to prevent mechanical damages
  • Special heating elements for zirconia sintering provide for longer service life with respect to chemical interaction between charge and heating elements
  • Protective gas connection for purging the furnace with non-flammable protective or reaction gases
  • Manual or automatic gas supply system
  • Inner process box to improve the gas tightness and to protect the furnace chamber against contamination
  • Lift door
  • Bottom insulation made of durable lightweight refractory bricks for heavy charge weights
  • Motorized exhaust air flap, switchable via the program
  • Safety concepts
  • Exhaust air and exhaust gas piping
  • Thermal or catalytic exhaust cleaning systems
  • FID measurement for process optimization
  • Process control and documentation via VCD software package or Nabertherm Control Center (NCC) for monitoring, documentation and control
ModelTmaxInner dimensions in mmVolumeOuter dimensions in mmHeating power inElectricalWeight
 °Cwdhin lWDHkW2connection*in kg
HT 04/161600150150150473049014005.23-phase1150
HT 08/161600150300150873064014008.03-phase1200
HT 16/16160020030026016810700150012.03-phase1270
HT 40/161600300350350401000800162012.03-phase380
HT 64/161600400400400641130900167018.03-phase550
HT 128/16160040080040012811301290167026.03-phase750
HT 160/16160050055055016012501050190021.03-phase800
HT 276/161600500100055027613001600190036.03-phase1100
HT 450/161600500115078045013501740212064.03-phase1500
            
HT 04/171750150150150473049014005.23-phase1150
HT 08/171750150300150873064014008.03-phase1200
HT 16/17175020030026016810700150012.03-phase1270
HT 40/171750300350350401000800162012.03-phase380
HT 64/171750400400400641130900167018.03-phase550
HT 128/17175040080040012811301290167026.03-phase750
HT 160/17175050055055016012501050190021.03-phase800
HT 276/171750500100055027613001600190036.03-phase1100
HT 450/171750500115078045013501740212064.03-phase1500
            
HT 04/181800150150150473049014005.23-phase1150
HT 08/181800150300150873064014008.03-phase1200
HT 16/18180020030026016810700150012.03-phase1270
HT 40/181800300350350401000800162012.03-phase380
HT 64/181800400400400641130900167018.03-phase550
HT 128/18180040080040012811301290167026.03-phase750
HT 160/18180050055055016012501050190021.03-phase800
HT 276/181800500100055027613001600190042.03-phase1100
HT 450/181800500115078045013501740212064.03-phase1500
1Heating only between two phases *Please see page 77 for more information about supply voltage
2Depending on furnace design connected load might be higher
 

High Temperature Furnaces with Molybdenum Disilicide Heating Elements with Refractory Insulation up to 1700 °C

HFL 160/17 HFL 16/17

Protection grid in front of heating elements prevent against mechanical damages

Gas supply system for non-flammable protective or reaction gases

HFL 16/16 - HFL 160/17

The high-temperature furnaces HFL 16/16 - HFL 160/17 are characterized by its lining with robust refractory insulation. Compared with the fiber-insulated models of the HT product line, these furnaces are recommended when high charge weights have to be sintered. In most cases lightweight refractory brick insulation is also significantly more resistant to gas emissions occurring during heat treatment.

Standard equipment like HT models, except:

  • Tmax 1600  °C or 1700  °C
  • Robust refractory insulation and special backing insulation
  • Furnace floor made of lightweight refractory bricks accommodates high charge weights
  • Defined application within the constraints of the operating instructions
  • NTLog Basic for Nabertherm Controller: Recording of process data with USB-flash drive

Additional equipment like HT models

ModelTmaxInner dimensions in mmVolumeOuter dimensions in mmHeating power inElectricalWeight
 °Cwdhin lWDHkW2connection*in kg
HFL 16/1616002003002601610008901620123-phase1500
HFL 40/1616003003503504011309151890123-phase660
HFL 64/1616004004004006412309801940183-phase880
HFL 160/161600500550550160140012502100213-phase1140
            
HFL 16/1717002003002601610008901620123-phase1530
HFL 40/1717003003503504011309151890123-phase690
HFL 64/1717004004004006412309801940183-phase920
HFL 160/171700500550550160140012502100213-phase1190
1Heating only between two phases *Please see page 77 for more information about supply voltage
2Depending on furnace design connected load might be higher
 

Lift-Top and Lift-Bottom Furnaces with Molybdenum Disilicide Heating Elements up to 1800 °C also as Combi Furnaces for Debinding and Sintering in one Process

HT 166/17 LB HT 500/17 LB

HT 750/18 LTS

Heat from all sides and between the stack to optimize temperature uniformity

Heating elements arranged one above the other for tall structures

HT 276/18 LTS with two inner process hoods for sintering under non-flammable protective or reaction gases

Measurement setup to determine the temperature uniformity in a high-temperature lift-bottom furnace

HT 276/17 LT DB200 with manual table changing system and debinding package

High-temperature lift-top furnace HT 2600/16 LT DB200 for production

High-temperature furnace HT 273/17S with table by transportable fork lift

HT 64/16 LB or LT - HT 1080/17 LB or LT

For charging complex settings we recommend lift-top or lift-bottom furnaces. Also small workparts can be conveniently loaded on different layers.

The basic furnace comes with one table. Depending on the technical requirements are equipped, a lift-top or lift-bottom version will be the choice. The system can be expanded with one or more changeable tables, either manually or electrically driven. Other additional equipment, like controlled cooling systems to short process cycles or the addition of a debinding package for debinding and sintering in one process provide for tailored solution for individual needs.

  • Tmax 1600  °C, 1750  °C or 1800  °C
  • Dual shell housing with fan cooling provides for low shell temperatures
  • Lift-top design: electrohydraulically driven hood with fixed table
  • Lift-bottom design: driven table and fixed hood
  • Gently running, low-vibration spindle drive or electrohydraulic drive for larger models
  • Safe and tight closing of the furnace by means of labyrinth seal
  • Heating from all four sides provides for good temperature uniformity
  • High-quality fiber insulation backed by special insulation
  • Side insulation constructed with tongue and groove blocks provides for low heat dissipation to the outside
  • Long-life roof insulation with special suspension
  • Furnace table with special bottom reinforcement to accommodate high charge weights
  • Motor-driven exhaust air flap in the furnace roof, switchable at the program
  • Heating elements switched via SCR‘s
  • Over-temperature limiter with manual reset for thermal protection class 2 in accordance with EN 60519-2 as temperature limiter to protect the furnace and load
  • Defined application within the constraints of the operating instructions
  • NTLog Basic for Nabertherm Controller: Recording of process data with USB-flash drive

Additional equipment

  • Uncontrolled or controlled cooling system with frequency-controlled cooling fan and motor-driven exhaust air flap
  • Furnace in DB design featuring fresh air preheating, exhaust gas ventilation and an extensive safety package for debinding and sintering in one process, i. e. without transfering the material from the debinding furnace to the sintering furnace
  • Stainless steel exhaust gas hoods
  • Commissioning of the furnace with test firing and temperature uniformity measurement (also with load) for the purpose of process optimization
  • Temperature measurement with thermocouples, types B and type S with automatic pull-out device for precise control results in the low temperature range
  • Special heating elements for zirconia sintering provide for longer service life with respect to chemical interaction between charge and heating elements
  • Heat from all sides and between the stack or with heating elements, positioned above each other to optimize temperature uniformity
  • Protective gas connection for purging the furnace with non-flammable protective or reaction gases
  • Manual or automatic gas supply systems
  • Inner process box to improve the gas tightness and to protect the furnace chamber against contamination
  • Bottom insulation made of durable lightweight refractory bricks for heavy charge weights
  • Gas supply system in the furnace chamber with ceramic bell jar, protective gas inlet and outlet from below for better sealing when operating with protective gases and/or to prevent from chemical interactions between the load and the insulation or the heating elements
  • Alternative table changing systems
  • Safety concepts
  • Exhaust air and exhaust gas piping
  • Thermal or catalytic exhaust cleaning systems
  • FID measurement for process optimization
  • Process control and documentation via VCD software package or Nabertherm Control Center (NCC) for monitoring, documentation and control
ModelTmaxInner dimensions in mmVolumeOuter dimensions in mmHeating
power inElectricalWeight
 °Cwdhin lWDHkW1connection*in kg
HT 64/16 LB, LT160040040040064110017502400363-phase1100
HT 166/16 LB, LT1600550550550166135020602600423-phase1500
HT 276/16 LB, LT16001000500550276180021002600453-phase1850
HT 400/16 LB, LT16001200600550400190022002680693-phase2600
HT 500/16 LB, LT16001550600550500210022002680693-phase2700
HT 1000/16 LB, LT160010001000100010001800290034501403-phase3000
HT 1030/16 LB, LT1600220060078010302950250030501603-phase3200
            
HT 64/17 LB, LT175040040040064110017502400363-phase1100
HT 166/17 LB, LT1750550550550166135020602600423-phase1500
HT 276/17 LB, LT17501000500550276180021002600453-phase1850
HT 400/17 LB, LT17501200600550400190022002680693-phase2600
HT 500/17 LB, LT17501550600550500210022002680693-phase2700
HT 1000/17 LB, LT175010001000100010001800290034501403-phase3000
HT 1030/17 LB, LT1750220060078010302950250030501603-phase3200
            
HT 64/18 LB, LT180040040040064110017502400363-phase1100
HT 166/18 LB, LT1800550550550166135020602600423-phase1500
HT 276/18 LB, LT18001000500550276180021002600453-phase1850
HT 400/18 LB, LT18001200600550400190022002680693-phase2600
HT 500/18 LB, LT18001550600550500210022002680693-phase2700
HT 1000/18 LB, LT180010001000100010001800290034501403-phase3000
HT 1030/18 LB, LT1800220060078010302950250030501603-phase3200
1Depending on furnace design connected load might be higher *Please see page 77 for more information about supply voltage