Molybdenum crucibles usually need to be pretreated before use. Pretreatment helps ensure that the surface of the crucible is in good condition and avoid unnecessary problems under high temperature conditions. The following are some common pretreatment methods:
- Clean the surface
Before use, the surface of the molybdenum crucible needs to be thoroughly cleaned to remove grease, dust, dirt or other possible contaminants. Usually, high-temperature cleaning agents or ultrasonic cleaning methods can be used for cleaning.
The cleaned crucible should be kept away from moisture in the air to prevent surface oxidation.
- Check for surface defects
Before use, carefully check the surface of the molybdenum crucible for cracks, defects or other damage. If defects are found, it is best to repair or replace the crucible first.
Especially in high temperature environments, any surface defects may lead to cracking or early failure of the crucible.
- Preheating
It is recommended to preheat the molybdenum crucible slowly when it is used for the first time or after it has not been used for a long time. By gradually heating up, thermal shock caused by rapid temperature changes can be avoided and the risk of cracks or cracks can be reduced.
If the crucible has been used for a certain period of time, the preheating process can also help remove any oxide layer that may exist on the surface.
- Avoid direct contact with air
When preheating, the molybdenum crucible should avoid being exposed to air for a long time, because exposure to air will cause surface oxidation.
If conditions permit, use an inert gas (such as argon) or a vacuum environment for pretreatment to reduce oxidation reactions.
- Surface coating (if necessary)
In some high temperature applications, it may be necessary to treat the molybdenum crucible with a surface coating, such as graphite, alumina, etc., to help further reduce oxidation and improve the durability of the crucible.
======================================================================
Customized R&D and Production of Tungsten, Molybdenum Products
Chinatungsten Online and CTIA GROUP LTD have been working in the tungsten industry for nearly 30 years, specializing in flexible customization of tungsten and molybdenum products worldwide, which are tungsten and molybdenum design, R&D, production, and overall solution integrators with high visibility and credibility worldwide.
Chinatungsten Online and CTIA GROUP LTD provide products mainly including: tungsten oxide products, such as tungstates such as APT/WO3; tungsten powder and tungsten carbide powder; tungsten metal products such as tungsten wire, tungsten ball, tungsten bar, tungsten electrode, etc.; high-density alloy products, such as dart rods, fishing sinkers, automotive tungsten crankshaft counterweights, mobile phones, clocks and watches, tungsten alloy shielding materials for radioactive medical equipment, etc.; tungsten silver and tungsten copper products for electronic appliances. Cemented carbide products include cutting tools such as cutting, grinding, milling, drilling, planing, wear-resistant parts, nozzles, spheres, anti-skid spikes, molds, structural parts, seals, bearings, high-pressure and high-temperature resistant cavities, top hammers, and other standard and customized high-hardness, high-strength, strong acid and alkali resistant high-performance products. Molybdenum products include molybdenum oxide, molybdenum powder, molybdenum and alloy sintering materials, molybdenum crucibles, molybdenum boats, TZM, TZC, molybdenum wires, molybdenum heating belts, molybdenum spouts, molybdenum copper, molybdenum tungsten alloys, molybdenum sputtering targets, sapphire single crystal furnace components, etc.
If you are interested in related products, please contact us:
Email: sales@chinatungsten.com
Tel: +86 592 5129696 / 86 592 5129595
