Preparation of Nano-tungsten Carbide Composite Carbide Reduction - Cobalt Composite Powder

The present invention describes a complex synthesis of nanocrystalline tungsten carbide - cobalt composite powder method.

Mainly consisting of preparation of tungsten - cobalt salt solution, the salt solution was spray-dried to prepare a homogeneous precursor powders, and at a certain temperature, fluidization H ↓ [2] restore, and then to CO / CO2 gas mixture for carbonization of the three process of the composition, characterized in that:

1)As preparing tungsten - cobalt salt solution introduced into an organic group: a saturated solution of the salt with organic tungsten (A) / W (Ⅵ) = 0.5 ~ 4 (molar ratio) was added organic material (A) , organic matter (A) and W salt complex reaction;

2)Then added to a saturated solution of a Co salt, adjusting the PH of the solution to above 7, the solution was precipitated to obtain a mixed sol dispersed height.

Note that: said organic material (A) containing -NH -N = O group and the organic compound, and 8-hydroxyquinoline and derivatives thereof in one.

The present invention describes a composite carbide reduction preparing nano tungsten carbide - cobalt composite powder, which has designed a recovery while reducing carbonization exhaust system, not only can more effectively control the WC grain size, and can greatly reduce the cost of production, has a greater industrial advantages.


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