Molybdenum Disilicide Heating Element

Product Description

1) Description
1. General Description: MoSi2 heating element is a resistance generate-heating component made from MoSi2 or the basic material. It is used in high temperature under the oxidizing atmosphere, it looks like glass in its surface and form a light SiO2 glass film which can protect the element not to be oxidized. So this kind of element has unique effect for resisting oxidization in the high temperature. It is used to the highest temperature up to 1800C during oxidizing atmosphere.

2. Specific Properties: Low expansion coefficient, little deformation, stable chemical property, long service life, easy installation and maintenance, etc.

3. Characteristics: MoSi2 heating element can usually make use of furnace temperature from 1300C to 1800C. It is used to the highest temperature up to 1800C during oxidizing atmosphere.

4. Application: It is extensively used in the industries of metallurgy, glass, ceramic refractory, crystal electronic device, industrial furnace manufacture, etc. It is an essential ideal element when the products are sintering in the high temperature.

2) Products specification:
In addition to MoSi2 elements in standard shapes and sizes we provide special designed MoSi2 elements according to customer needs, enabling an optimized element design for each particular application.

1. Types: U, W, UL, WL, rod type. Or special types according to your requirement.
2. Diameter: 3/6 mm, 4/9 mm, 6/12mm, 9/18mm, 12/24mm
3. Temp: 1300-1800 Celsius degrees
4. Quality: ISO9001: 2008 quality system authentication
Packaging Detail: Outer wooden box, cartoon box inside, polyfoam filled to ensure safety
Delivery Detail one week

3) Technical Data
Density Bending Strength Hardness Apparent Porosity Water Absorption Elongation Fracture Toughness Compressive Strength
5.8g/cm3 350Mpa 12.0Gpa ± 2% 0 4% 4.5Mpa. M1/2 650Mpa

4) The influence of operation temperature on the heater surface in a different atmosphere

Atmosphere 1700 Type 1800 Type
Air 1700 1800
N2 1600 1700
He 1600 1700
-80° C Dry H2 1150 1150
-20° C Wet H2 1450 1450
10%CO2, 50%CO, 15%H2 1600 1700
40%CO2, 20%CO 1400 1450
Cracked and Partially Burnt Ammnia 1400 1450

5) MoSi2 heating elements physics and chemistry characters:

1. Physics Characters
Volume Density Bending Strength Vickers Hardness Porosity Water absorption Heating Elongation Rate
5.5 g/cm3 15-25 kg/cm3 (HV)570kg/mm2 7.4% 1.2% 4%
2. Chemistry Character MoSi2 heating element is used in the high temperature under oxidizing atmosphere. It will form the SiO2 film which can keep the element from being melted. During the oxidizing process, the SiO2 protecting film is formed again when the element continues to be used. The MoSi2 heating element must not be used in the temperature between 400C and 700C for a long time, otherwise the element will be cremated under the strong oxidizing function in the low temperature.

6) MoSi2 Heating Element's installation:
1. The resistivity of the Mosi2 heating element is not changing with the time, so a new one can be installed without affecting the old one. This can result of the huge saving in furnace maintenance fee sand time as well, increase the working efficiency. This is the key point of Mosi2 heating element being a better material and being widely used.

2. The brittleness of MoSi2 heating element is relative more under the usual temperature; It also has plasticity under the high temperature. So you had better hang and erect vertically the "U"-shape element. If you need to erect it horizontally, please choose a support of high-temperature insulating materials. The cone-part of the element must extend inside the furnace. At first the fixture of MoSi2 power connector can't be screwed too tightly. When temperature of the element is going up, please twist it tightly again, so the element is not easily broken.