Contrast between Yttrium Oxide Tungsten Crucible and Pure Tungsten Crucible

The color of yttrium oxide is white with a little yellow which is incompatible with water and alkali, and mainly dissolve in acid. Yttrium oxide is mainly formed by the decomposing of fergusonite, and after the extraction of mixed rare earth solution, dissolving it in acid, and extract again, and concentrate it directly. Finally burning it. Yttrium oxide tungsten crucible is a new type of tungsten crucible which has a high strength and has a strong corrosion resistance.

Tungsten crucible has many excellent properties. Such as high melting point, high temperature strength, a good thermal conductivity, and a small coefficient of thermal expansion. However, because the boundary of the tungsten granule is easily to be corroded, and therefore, the corrosion resistance of ordinary crucible tungsten should be improved. On the contrary, yttrium oxide tungsten crucible can solve this problem radically.

In the manufacturing process of yttrium oxide tungsten crucible, the 1μm yttrium oxide particles will penetrate into the boundaries of the tungsten crystal, distributing evenly around the tungsten crystal. The uniform penetration of yttrium oxide particles can suppress the molten metal and tungsten particles into chemical compound. And it can improve the corrosion resistance of the tungsten crucible. on the other hand, strength of bending resistance of this type tungsten crucible would reach 800MPa under 1000 ℃. Therefore, the yttrium oxide tungsten crucible has a stronger bending strength which is the five times than the pure tungsten crucible.

Except for the improvement of corrosion resistance, yttrium oxide tungsten crucible has a stronger thermostability by comparison with the general pure tungsten crucible. Under normal circumstances, yttrium oxide tungsten crucible can melt dysprosium, neodymium and other reactive rare earth metals, such as aluminum. When melting rare earth metals, yttrium oxide tungsten crucible cannot be corroded and melted.

In addition to the above features, in the manufacturing process of yttrium oxide tungsten crucible, users should pay attention to the protection of yttrium oxide toxicity. Yttrium oxide does harm for our eyes if it contact with the eyes. And it would cause some damage to the liver and lungs if accidentally taking it. Therefore, during the manufacturing process of yttrium oxide tungsten crucible users should be careful with the respiratory system and eyes. It would be better to choose the appropriate respirator and wear anti-chemical goggles and face mask and use safety appliance such as glove when apply, avoid directly touch.