PL-MSU Type Molybdenum disilicide (MoSi2) Heating Elements

 

1. When order PL-MSU type MoSi2 heaters, please indicate as below:

 

Dia 6/12*200*180*30mm (Dia d/c*Le*Lu*a mm)

d = the diameter of hot zone

c = the diameter of cold zone

Le = the length of hot zone

Lu = the length of cold zone

 

2. Standard Sizes:

 

Grade	1700					1800
d/c mm	3/6	4/9	6/12	9/18	12/24	3/6	4/9	6/12	9/18	12/24
Le, max mm.	350	450	1400	1400	1700	350	450	1400	1400	1700
Lu, max mm	300	450	1000	1000	1000	300	450	1000	1000	1000
a typical mm	25	25	40/50	60	80	25	25	40/50	60	80
f mm	25	25	45	75	100	25	25	45	75	100
g mm	15	15	25	30	40	15	15	25	30	40

 

Clients’ special requests with drawings or furnace heat designing are also available.

 

3. Properties:

 

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 SiO2glass 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 1800℃ during oxidizing atmosphere. According to your request, our company can produce the products of Pole, "U", "W" and "U"-right angle shapes, etc.

 

MoSi2 heating elements can usually make use of furnace temperature from 1300℃ to 1800℃ 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.

 

4. Physics and Chemistry Characters

 

a. Physics character:

 

Volume Density	Bending Strength	Vickers Hardness	Gas Hole Rate	Drawing Water Rate	Heating Elongation Rate
5.5  g/cm3	15-25 kg/cm3	(HV)570kg/mm2	7.4%	1.2%	4%

 

b. 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 long time; otherwise the element will be cremated under the strong oxidizing function in the low temperature.

 

5. MoSi2 Heating Elements’ proper installation:

 

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 MoSi2power connector cannot be screwed too tightly. When temperature of the element is going up, please twist it tightly again, so the element is not easily broken.

 

Proper installation: please choose the specialize power connector provided by our company) The furnace top must be a good function of heat-preservation. In general, the temperature of furnace top cannot be over 300℃. The voltage should be low 0.1 between the power connector and the element. In order to avoid radiating heat to pass the connector, the distance is not less than 50mm between the low end of connector and the upside of the ceramic brick. The Dia.6 element cannot be used of 170A for a long time. The Dia.9 element cannot be used of 300A for a long time.

 

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