Ceramics & Insulating materials supplier

Cordierite ceramic insulator with screw thread for heating wire

Cordierite ceramic insulator with screw thread for heating wire

Material: cordierite, steatite, alumina

Size: Support OEM

  • Description:

Ceramic wire-wound resistors consist of a resistance wire wound around a ceramic core. The shape of the resistor can be round or oval and is coated with an insulating material.
The ceramic resistors comply of one or multiple ceramic wire-wound resistors fitted with a protection grid and optional connection box and or thermal switch. We produce ceramic wire-wound resistors only to costumer’s drawing, sample and to costumer’s requirements.

  • Material:

Steatite C221 is the optimal choice of ceramic bases material for temperatures below 350 -400ºC. It has high mechanical strength and excellent DC stability.
For large resistor types, corderite C520 are used due to its very high stability to temperature changes.

  • APPLICATION:

  • Brake resistors
  • “Snubbers” (attenuators in controlled and uncontrolled rectifiers)
  • Charging and discharging resistors
  • Starting of large electric motors

 

Properties

Units

Steatite

Cordierite

Mullite

Colour

White

Yellow

White

Density

g/cm3

2.7

1.9

2.0

Flexural Strength

Mpa

140

30

120

Compressive Strength

MPa

900

350

500

Max Use Temperature

°C

1000

1200

1300

Thermal Condutivity

W/m.K

2~3

1.3~1.8

2~6

Thermal Expansion Cofficient

10-6/°C

7 ~ 9

1.5~3.5

5~6

Thermal Shock Resistance

K

100

300

150

Specific Heat

J/kg.K

850

800

900

Dielectric Strength

KV/mm

20

30

Dielectric Constant

Er

6

8

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