Blue Tungsten Reduction Mechanism

The main components of the blue phase is B- tungsten oxide, tungsten, tungsten blue particle surface is rough, but with more of a crack, it is because there is a crack in the B- tungsten oxide reduction process in favor of hydrogen into the interior of the particle reduction reaction and the generated steam is discharged. With blue tungsten in hydrogen reduction, the main-phase component of the tungsten oxide oxygen atom declining, gap increasing gradually transformed into the tungsten oxide of the tungsten oxide Y-First, the surface of the tungsten oxide in the tungsten oxide is formed, which is acicular particle shape and short rod arranged quite irregular, and the resulting acicular short rod B- Y- tungsten oxide and tungsten oxide crystal comparison, particles finer.

With the reduction of the depth tungsten oxide oxygen atom further reduced, while further increasing the vacancy. From tungsten oxide develop into tiny needle or short rod, and become more loose, it is easy to generate hydrogen gas into the interior of the particles and the discharge of water, because the Y- tungsten oxide when converted to tungsten dioxide, by needle or short Y- a single rod-like tungsten oxide needle bar into a single crystal tungsten dioxide formed by the development, tungsten dioxide particles consisting of a plurality of tungsten dioxide crystal beginning to coalesce into a sintered body, while it becomes more dense particles, shape with tungsten powder particle morphology was very similar to the last $ # This process is therefore reduction of tungsten blue ultrafine tungsten powder Preparation key link. If control the reducing conditions of the process, with the tungsten oxide can be prepared Y- ultrafine tungsten powder.

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