• Heating Elements Overview
  • Carbon-Carbon Composite (CCC) Elements
  • Graphite Elements
  • SiC Coated Graphite Elements
  • PG-PBN - Pyrolytic Boron Nitride Elements
  • NiCr Elements in Ceramic
  • Refractory Metal
  • Elements in Ceramic Housing

Heating Elements Overview

Element Type Mass Air Inert Gas Environment Corrosive Environment High Vacuum Ultra High Vacuum
Carbon Carbon Composite Elements (CCC) Low Not suitable 2100°C Yes 2100°C 1600°C
Graphite Elements Low Not suitable 2100°C Yes 2100°C 1600°C
SiC Coated Elements Low 1500°C 1600°C Yes 1500°C 1200°C
PG PBN Elements Low 1500°C 1500°C Yes 1300°C 1100°C
NiCr In Ceramic High 1100 1100 Yes 1000 Not suitable
Refractory Metal High Not suitable 2100°C See table See table See Table

To accommodate your needs we provide a wide range of resistance heating elements for high temperature heaters. These elements are available to be purchased from our standard designs or produce bespoke designs to suit your specific requirements.

If you require any assistance in selection or would like to discuss your requirement, please contact us and we will be happy to help.

Carbon Carbon Composite (CCC) Elements

Element Type Mass Air Inert Gas Environment Corrosive Environment High Vacuum Ultra High Vacuum
Carbon Carbon Composite (CCC) Low Not suitable Yes Yes 2100°C 1600°C

Carbon carbon composite (CCC) has many thermal and mechanical properties required by aerospace, automotive, Semiconductor, MOCVD industrial applications to name but a few where materials must operate at high temperature in vacuum. These include stable mechanical properties to temperatures approaching 3000 °C; high ratios of stiffness-to-weight and strength-to-weight; low thermal expansion; and good resistance to thermal shock and corrosion.

Carbon Carbon Composite heating elements offer a 2100°C maximum temperature when vacuum heating, for use in UHV, high vacuum or inert atmosphere (Not suitable for use in O2 above 500c). High strength, Low cost, high power density element, available as a single element in sizes up to 1000mm x 1000mm, mainly used for flat heater elements due to raw material availability. Standard heating element sizes available from stock. Standard thicknesses from 1.2mm. Will not age harden and become stronger with temperature. Our number one choice of element in non-oxidising atmosphere.

Thermic Edge are able to supply CCC elements from stock, from your component files or we are able to design to your specific requirements.

Element Ref Availability Hot Zone Size
(mm dia)
Element Size
(mm)
Height
(mm)
Connection Point Distance (mm) Estimated Power for unshielded element at 1000°C (Watts)
CCC-FC-1-1.1 To order 25.4 25.4 1.2 27.9 250
CCC-FC-1-2.1 To order 50.8 50.8 1.2 68.4 1100
CCC-FC-1-3.1 To order 76.2 76.2 1.2 92.5 2100
CCC-FC-1-4.1 To order 101.6 101.6 1.2 130.7 4200
CCC-FC-1-5.1 To order 127.0 127.0 1.2 146.8 5200
CCC-FC-1-6.1 To order 152.4 152.4 1.2 162.9 6300
CCC-FC-1-7.1 To order 177.8 177.8 1.2 176.2 8600
CCC-FC-1-8.1 To order 203.2 203.2 1.2 189.4 11000
Element Ref Availability Hot Zone Size (mm dia) Element Size (mm) Height (mm) Connection Point Distance (mm) Estimated Power for unshielded element at 1000°C (Watts)
CCC-FR-1-1.1 To order 25.4 x 25.4 30 x 40 1.2 27.9 300
CCC-FR-1-2.1 To order 50.8 x 50.8 67 x 77 1.2 68.4 1500
CCC-FR-1-3.1 To order 76.2 x 76.2 95 x 105 1.2 92.5 2700
CCC-FR-1-4.1 To order 101.6 x 101.6 135 x 145 1.2 130.7 5300
CCC-FR-1-5.1 To order 127.0 x 127.0 150 x 160 1.2 146.8 6600
CCC-FR-1-6.1 To order 152.4 x 152.4 166 x 176 1.2 162.9 8100
CCC-FR-1-7.1 To order 177.8 x 177.8 193 x 203 1.2 176.2 11000
CCC-FR-1-8.1 To order 203.2 x 203.2 250 x 260 1.2 189.4 14000

 

Graphite Elements

Element Type Mass Air Inert Environment Corrosive Environment High Vacuum Ultra High Vacuum
Graphite Low Not suitable 2100°C Yes 2100°C 1600°C

High density graphite is ideal for vacuum heating elements. The graphite elements are highly inert and the material actually increases in strength as it becomes hotter.  Another feature of the material is that it has a low expansion coefficient and is resistant to degrading due to constant heat cycling therefore, it has a good lifespan in this respect and a relatively fast ramp rate.

The elements are made from blocks of high purity graphite and with the correct material selection the graphite can be machined into detailed forms for one off or low volume batches. If you can not find your requirement in the stock items below or in the gallery then please contact us to discuss you requirement further. The designs can be of a 3D nature to produce a tubular heater or flat as required. Alternatively, we can design elements or work from existing drawings.

Thermic Edge can provide Silicon Carbide coated elements or Titanium Carbide coating to further enhance these element in terms of purity and using graphite in air.

Flat Graphite Elements

Element Ref Availability Hot Zone Size (mm dia) Size (mm) Height (mm) Connection Point Distance (mm) Estimated Power for shielded element at 1000°C (Watts)
G-FC-1-1.1 To order 25.4mm 30.0 2 27.9 200
G-FC-1-2.1 To order 50.8mm 67.0 2 68.4 900
G-FC-1-3.1 To order 76.2mm 95.0 2 92.5 1700
G-FC-1-4.1 To order 101.6mm 134.4 3 130.7 3500
G-FC-1-5.1 To order 127mm 150.2 3 146.8 4200
G-FC-1-6.1 To order 152.4mm 166.0 3 162.9 5100
G-FC-1-7.1 To order 177.8mm 193.0 3 176.2 6900
G-FC-1-8.1 To order 203.2mm 220.0 3 189.4 9000

Graphite Element Assemblies

Element Ref Availability Hot Zone Size (mm dia) Size (mm) Height (mm) Connection Point Distance (mm) Estimated Power for shielded element at 1000°C (Watts)
G-AC-1-1.1 To order 25.4mm 30.0 37.4 27.9 200
G-AC-1-2.1 To order 50.8mm 67.0 37.4 68.4 850
G-AC-1-3.1 To order 76.2mm 95.0 37.4 92.5 1700
G-AC-1-4.1 To order 101.6mm 134.4 38.4 130.7 3500
G-AC-1-5.1 To order 127.0mm 150.2 38.4 146.8 4200
G-AC-1-6.1 Stock 152.4mm 166.0 38.4 162.9 5100
G-AC-1-7.1 To order 177.8mm 193.0 38.4 176.2 7000
G-AC-1-8.1 To order 203.2mm 220.0 38.4 189.4 8800

SiC Coated Graphite Elements

Element Type Mass Air Inert Environment Corrosive Environment High Vacuum Ultra High Vacuum
SiC Coated Graphite Low 1600°C 1600°C Yes 1600°C 1100°C

Thermic Edge have developed a range of standard Silicon Carbide Coating (SiC) coated Graphite elements in order to provide a low cost solution for high temperature heating in O2 and corrosive environments. SiC coating is suitable for use in Oxygen environments up to 1600°C and in High Vacuum up to 1000°C. The Sic coating is fully compatible with Hydrogen and inert gas environments.

The graphite elements are simple to mount, with two M14 threaded sections, allowing for stress relief of the main element. An M5 female threaded hole is provided on each power leg to allow connection to the customers power source, via ring terminals or busbars. The electrical connection is made at the base of the element against exposed graphite, which is kept outside of the hot zone of the element, eliminating the risk of a reaction between the power connection and the exposed graphite.

Thermic Edge are also able to offer customized SiC coated elements to suit existing systems. For more information or to discuss a requirement, please contact our sales team who will be able to assist in identifying a suitable solution.

Element Ref Availability Hot Zone Sizes (mm dia) Size (mm) Height (mm) Connection Point Distance (mm) Estimated Power for shielded element at 1000°C (Watts)
GS-FC-1.1 To order 25.4mm 30.0 2.1 27.9 200
GS-FC-2.1 To order 50.8mm 67.0 2.1 68.4 900
GS-FC-3.1 To order 76.2mm 95.0 2.1 92.5 1700
GS-FC-4.1 To order 101.6mm 134.4 3.1 130.7 3500
GS-FC-5.1 To order 127mm 150.2 3.1 146.8 4200
GS-FC-6.1 To order 152.4mm 166.0 3.1 162.9 5100
GS-FC-7.1 To order 177.8mm 193.0 3.1 176.2 6900
GS-FC-8.1 To order 203.2mm 220.0 3.1 189.4 9000
Element Ref Availability Hot Zone Sizs (mm dia) Size (mm) Height (mm) Connection Point Distance (mm) Estimated Power for shielded element at 1000°C (Watts)
GS-AC-1.1 To order 25.4mm 30.0 37.5 27.9 200
GS-AC-2.1 Stock 50.8mm 67.0 37.5 68.4 850
GS-AC-3.1 Stock 76.2mm 95.0 37.5 92.5 1700
GS-AC-4.1 To order 101.6mm 134.4 38.5 130.7 3500
GS-AC-5.1 To order 127.0mm 150.2 38.5 146.8 4200
GS-AC-6.1 Stock 152.4mm 166.0 38.4 162.9 5100
GS-AC-7.1 To order 177.8mm 193.0 38.4 176.2 7000
GS-AC-8.1 To order 203.2mm 220.0 38.4 189.4 8800

PG-PBN - Pyrolytic Boron Nitride Elements

Element Type Mass Air Gas Environment Corrosive Environment High Vacuum Ultra-High Vacuum
PG PBN Low 500°C 1500°C Yes 1600°C 1200°C

PG/PBN ceramic heaters are produced in a CVD reactor and consist of a PBN (Pyrolytic Boron Nitride) substrate, that has a layer of PG (Pyrolytic Graphite) deposited on one side. An element path is machined into the PG layer producing a hot zone with power connection points, around a through hole, at each end of the PG element track. The heater is then fully overcoated with PBN, to insulate the PG layer leaving the power connection points as the only exposed graphite. Power connection points can be located inside the hot zone, or for better thermal uniformity, on tabs outside the hot zone.

PG/PBN heaters can operate up to 1500c maximum temperature, with very fast ramp rates, low mass and chemically very inert to corrosive gasses and liquids and can withstand most molten metals. These heaters are also thermally shock resistant, mechanically durable, and have very high power density, up to 35 watts/cm² (225 watts/in²). The layered pyrolytic structure also gives the PG/PBN element very high thermal uniformity, on the PBN substrate side (opposite side to the element track). Samples can be placed directly onto the element surface.

Suitable for use in UHV, High vacuum or Air (PBN to 900C, exposed PG power pads to 500C) and suitable for deposition process.

Thermic Edge offers a range of standard PB/PBN heaters along with custom sizes/designs to suit customer specifications:

Element Ref Availability Hot Zone Size (mm) Resistance*(Ω) Estimated Power** (Watts)
PCPBNP05 To Order Ø12.7 10-15 180
PCPBNP07 To Order Ø19.1 10-15 270
PCPBNP10 To Order Ø25.4 10-15 450
PCPBNP17 To Order Ø44.5 10-15 1300
PCPBNP20 To Order Ø50.8 10-15 1800
Element Ref Availability Hot Zone Size (mm) Resistance*(Ω) Estimated Power** (Watts)
PCPBNC05 To Order Ø12.7 9.6-14.4 180
PCPBNC10 To Order Ø25.4 10-15 450
PCPBNC15 To Order Ø38.1 10-15 1050
PCPBNC17 To Order Ø44.5 10-15 1300
PCPBNC20 To Order Ø50.4 10-15 1800
PCPBNC30 To Order Ø77.0 15-30 4600
PCPBNC35 To Order Ø88.9 15-30 5800
PCPBNC40 To Order Ø102.0 31.5-38.5 7200
Element Ref Availability Hot Zone Size (mm) Resistance*(Ω) Estimated Power** (Watts)
PCPBNR10 To Order Ø25.4 10-15 450
PCPBNR20 To Order Ø50.8 10-15 1800
PCPBNR30 To Order Ø75.0 10-15 4600

*Resistance at Room Temperature.
**Estimated Power for unshielded element at 1000°C

Special Element Range

Special Elements

Element Ref. PCPBNS01 PCPBNS02 PCPBNS03 PCPBNS04 PCPBNS05 PCPBNS06 PCPBNS07 PCPBNS08
Heater Area (mm) Ø9.0 10×10 10×10 16×12 Ø16.6 Ø22.0 24×15 Ø38.0
Size (mm) Ø18.0 20×15.5 20×15 16×12 30×25 30×25 24×15 Ø50
Resistance* (Ω) 10-14 5-10 18-22 5-10 13-22 13-22 27-33 15-20

Accessories

Power Leg Screws in the following materials:

  • Graphite – Round head M2, M2.5, M3, M4 & M5
  • Ceramic – Round Head M2, M2.5, M3, M4 & M5
  • Ceramic – Countersunk Head M2.5, M3, M4 & M5 (counter sunk elements available upon request)

Graphite Power Legs in a range of lengths and thread combinations:

  • Graphite Nuts M2, M2.5, M3, M4 & M5, 3mm thick.
  • Graphoil contact washers 0.5mm thick to suit above screw sizes.
  • Pure Nickel Ring crimp terminals to suit above leg sizes.

NiCr Elements In Ceramic

Element Type Mass Air Gas Environment Corrosive Environment High Vacuum Ultra High Vacuum
NiCr In Ceramic High 1100 1100 Yes 1000 Not suitable

The Nickel / Chrome element is a popular choice of heating element and in air and vacuum heater.  Whilst the element will reach around 1100°C generally it is used in conjunction with a ceramic top plate to mount samples. The top plate temperature will be 800°C where the sample can be placed.

Nickel / Chrome element is the oldest documented form of resistance heating alloy, 1906.  Our preferred choice is 80% nickel and 20% chromium, by mass, but there are many other combinations of metals for various applications. Nickel / Chrome wire is silvery-grey in colour, is corrosion-resistant. This material is suited to resistance heating because of its strength, ductility, resistance to oxidation and stability at high temperatures.

Thermic edge can provide these NiCr heating elements individually made to your required length or if you choose in a ceramic base.  Additionally, we can supply insulation beads and top plates.  You can purchase as much or a little of the heater as you require making maintenance quick and easy.

Our standard sizes range from 1” to 8” diameter. However, Thermic Edge provide bespoke solutions for larger sizes and alternative shapes.  Click here to see our standard range of Nickel / Chrome heaters.

Element Ref Availability Hot Zone Size (mm) Base Size (mm) Height (mm) Coil Path (mm) dia.
NiCr-Base-C-1-1 To order 26mm 31 12 6.4
NiCr-Base-C-2-1 To order 52mm 57 12 6.4
NiCr-Base-C-3-1 To order 78mm 83 12 6.4
NiCr-Base-C-4-1 To order 105mm 110 12 6.4
NiCr-Base-C-5-1 To order 129mm 134 12 6.4
NiCr-Base-C-6-1 To order 156mm 161 12 6.4
NiCr-Base-C-7-1 To order 179mm 184 12 6.4
NiCr-Base-C-8-1 To order 205mm 210 12 6.4
Element Ref AWG Wire dia. (mm) OD of Coil (unstretched) (mm) Turns per 25mm W per 25mm of Coil @20°C Order lead time
NiCr-W10 20 1.00 6.4 25 0.558 To Order 5 days
NiCr-W08 20 0.81 6.4 31 1.176 To Order 5 days
Element Ref Availability Hot Zone Size (mm) Base Size (mm) Height (mm) Leg length (mm) Estimated Power for unshielded element at 1000°C (Watts)
NiCr-H-1-1 To order 26mm 31 12 150 100
NiCr-H-2-1 To order 52mm 57 12 150 350
NiCr-H-3-1 To order 78mm 83 12 150 600
NiCr-H-4-1 To order 105mm 110 12 150 1500
NiCr-H-5-1 To order 129mm 134 12 200 3700
NiCr-H-6-1 To order 156mm 161 12 200 4000
NiCr-H-7-1 To order 179mm 184 12 200 4500
NiCr-H-8-1 To order 205mm 210 12 200 5400

Refractory Metal

Element Type Air Inert Gas Environment Corrosive Environment High Vacuum Ultra High Vacuum
Tungsten Not suitable 2600°C Yes 2600°C 2100°C
Molybdenum Not suitable 2100°C No 2100°C 1550°C

Tungsten

Tungsten is grey/white in colour and is very robust, it has the highest melting point (3422 °C) and lowest vapor pressure of all metals making it a great material for high vacuum technology. Because of its electrical resistance characteristics, it is frequently used in the construction of high temperature furnaces.

2600c maximum temperature, for use in UHV, high vacuum or inert atmosphere (Not suitable for use in O2 above 500c). Refractory metal elements are laser cut from sheet metal or wound into a coil from wire.

Molybdenum

Molybdenum material is a silvery metal with a grey cast which has a very high melting point. Because molybdenum possesses a very high melting point, a low coefficient of thermal expansion and a high level of thermal conductivity, it is used in many different industries. Operating at 2100°C in high vacuum.

Element Ref Availability Hot Zone Size (mm dia) Element Size (mm) Height (mm) Connection Point Distance (mm) Estimated Power for shielded element at 1000°C (Watts)
W-FC-1-1 To order 25.4 30 0.1 27.9 150
W-FC-2-1 To order 50.8 67 0.1 68.4 650
W-FC-3-1 To order 76.2 95 0.1 92.5 1500
W-FC-4-1 To order 101.6 134.4 0.1 130.7 2600
W-FC-5-1 To order 127.0 150.2 0.1 146.8 3200
W-FC-6-1 To order 152.4 166 0.1 162.9 3900
W-FC-7-1 To order 177.8 193 0.1 176.2 5300
W-FC-8-1 To order 203.2 220 0.1 189.4 6800
Element Ref Availability Hot Zone Size (mm dia) Element Size (mm) Height (mm) Connection Point Distance (mm) Estimated Power for shielded element at 1000°C (Watts)
Mo-FC-1-1 To order 25.4 30 0.1 27.9 150
Mo-FC-2-1 To order 50.8 67 0.1 68.4 700
Mo-FC-3-1 To order 76.2 95 0.1 92.5 1500
Mo-FC-4-1 To order 101.6 134.4 0.1 130.7 2700
Mo-FC-5-1 To order 127.0 150.2 0.1 146.8 3500
Mo-FC-6-1 To order 152.4 166 0.1 162.9 4100
Mo-FC-7-1 To order 177.8 193 0.1 176.2 5500
Mo-FC-8-1 To order 203.2 220 0.1 189.4 7100

Elements in Ceramic Housing

Thermic Edge offer, for every element, the option to include a ceramic insulation housing for the element to sit in. Providing both protection and electrical isolation for resistance elements when integrated into the customers system. This is of particular use when space is limited within the customers process, or where heating is required in two directions above and below the element.

The housing is made to suit the element, and is manufactured from ceramic, which is suited to the customers process, considering the environment, vacuum level, maximum temperature and ramp rate required.

Ceramic Base to fit Round Elements for Versatile heater range

Base Ref Fits Element Ref. Availability Sample Size (mm dia) Element Size (mm) Height (mm) Connection Point Distance (mm)
Base-FC-1-1.1 CCC-FC-1-1.1 To order 25.4 25.4 5 27.9
Base-FC-1-2.1 CCC-FC-1-2.1 To order 50.8 50.8 5 68.4
Base-FC-1-3.1 CCC-FC-1-3.1 To order 76.2 76.2 5 92.5
Base-FC-1-4.1 CCC-FC-1-4.1 To order 101.6 101.6 5 130.7
Base-FC-1-5.1 CCC-FC-1-5.1 To order 127.0 127.0 5 146.8
Base-FC-1-6.1 CCC-FC-1-6.1 To order 152.4 152.4 5 162.9
Base-FC-1-7.1 CCC-FC-1-7.1 To order 177.8 177.8 5 176.2
Base-FC-1-8.1 CCC-FC-1-8.1 To order 203.2 203.2 5 189.4

Ceramic Base for Square Elements

Base Ref. Fits Element Ref Availability Sample Size (mm dia) Element Size (mm) Height (mm) Connection Point Distance (mm)
BASE-FR-1-1.1 CCC-FR-1-1.1 To order 25.4 x 25.4 30 x 40 5 27.9
BASE-FR-1-2.1 CCC-FR-1-2.1 To order 50.8 x 50.8 67 x 77 5 68.4
BASE-FR-1-3.1 CCC-FR-1-3.1 To order 76.2 x 76.2 95 x 105 5 92.5
BASE-FR-1-4.1 CCC-FR-1-4.1 To order 101.6 x 101.6 135 x 145 5 130.7
BASE-FR-1-5.1 CCC-FR-1-5.1 To order 127.0 x 127.0 150 x 160 5 146.8
BASE-FR-1-6.1 CCC-FR-1-6.1 To order 152.4 x 152.4 166 x 176 5 162.9
BASE-FR-1-7.1 CCC-FR-1-7.1 To order 177.8 x 177.8 193 x 203 5 176.2
BASE-FR-1-8.1 CCC-FR-1-8.1 To order 203.2 x 203.2 250 x 260 5 189.4

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