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Nano violet tungsten oxide powder may not only be applied in heat insulating window glass, but also for the preparation of nano grain size WC-Co composite powder by violet tungsten oxide spray drying-direct carbonization method. The conventional process for preparing WC-Co composite powder is firstly prepared cobalt salt into Co powder by acid leaching, precipitation, calcination and reduction; and prepared tungsten concentrate into WC powder by smelting, calcining, reducing and carbonizing. Alcohol is used as a wet grinding medium. The…

Nano violet tungsten oxide powder may be applied for producing window heat insulation film with high transparency. Violet tungsten oxide can also be used in the preparation of nano-WC-Co composite powder by violet tungsten oxide spray drying-direct carbonization method. The spray conversion method is a relatively mature and advanced method for the preparation of WC-Co composite powder in the world. Spray conversion method, also called thermochemical synthesis method, is a method that dissolves soluble tungsten salt and soluble cobalt salt…

Nano violet tungsten oxide powder may be applied in thermal insulating glass in the form of heat insulation film. Nano grain size violet tungsten oxide can also be used as one of the raw materials for preparing nano WC-Co composite powder by violet tungsten oxide spray drying-direct carbonization method. Other raw materials used are cobalt acetate, organic carbon (carbon content≥40%, soluble in water) and ultrapure carbon black. Preparation of Nano WC-Co Composite Powder by Violet Tungsten Oxide Spray Drying-Direct Carbonization…

Nano violet tungsten oxide powder may be applied for producing heat insulation coating, and thus be used to prepare thin heat-insulating film for buildings and cars. Nano grain size violet tungsten oxide can also be used in violet tungsten oxide spray drying-direct carbonization to prepare nano particle size WC-Co composite powder, which is a new process based on spray drying-direct carbonization. Why use violet tungsten oxide spray drying-direct carbonization method instead of spray drying-direct carbonization method to prepare nanometer WC-Co…

Nano violet tungsten oxide powder may be used to produce thermal insulation coating. Violet tungsten oxide can also be used in spray drying-direct carbonization to prepare nano grain size WC-Co composite powder. The WC-Co composite powder prepared by hydrogen reduction at 950°C has narrow particle size distribution, fine grain size, particle size of 5~45μm and average particle size of 23.38μm. And the obtained nano grain size composite powder has pure phase with no η phase. The precursor powder was prepared…

Nano violet tungsten oxide powder not only may be applied for producing near-infrared shielding material, but also for manufacturing nano WC-Co composite powder. The preparation of nano WC-Co composite powder by violet tungsten oxide spray drying-direct carbonization method is based on WC-6%Co. The amount of raw materials including violet tungsten oxide, cobalt acetate, organic carbon and ultra-pure carbon black are calculated. Weigh moderate amount of raw materials add them into the inclined rolling ball mill equipped with an appropriate amount…

Nano violet tungsten oxide powder may be used to prepare thermal insulation paper, which is transparent for thermal insulation in architectural glass and automotive glass. Violet tungsten oxide can also be used to prepare submicron tungsten powder by cycle reduction-oxidation method. By three times of reduction and twice oxidation of violet tungsten oxide, submicron tungsten powder having a particle size concentration of between 0.21 and 1.05μm can be prepared. The coarse particles in the submicron tungsten powder are largely reduced.…

Nano violet tungsten oxide powder may be used for the preparation of thermal insulation film, which may be applied to fields such as building heat insulation and automobile heat insulation. Violet tungsten oxide can also be used to prepare submicron tungsten powder. The violet tungsten oxide is reduced by three times of reduction. The reduction process is: a temperature of 640 degrees Celsius, a temperature of 760 degrees Celsius, and a temperature of 680 degrees Celsius. When the temperature reaches…

Nano violet tungsten oxide powder may be used to prepare ceramic microsphere for applying in the production of heat insulating materials such as thermal insulation films. Violet tungsten oxide can also be used to prepare submicron tungsten powder. The violet tungsten oxide is continuously reduced three times. The reduction process is as follows: a temperature of 640°C, a temperature of 760°C, a temperature of 860°C. Keep warm for 20min when the temperature reaches 860°C. Twice oxidation. The oxidation process is:…

Nano violet tungsten oxide powder can not only be applied for producing thermal insulation masterbatch and therefore be applied to manufacture thermal insulation film, but also be used as a raw material for the preparation of submicron tungsten powder. Preparation of Submicron Tungsten Powder by Cyclic Reduction-oxidation of Violet Tungsten Oxide 1. Raw materials. The violet tungsten has specific surface area (BET) of 0.128m2?g-1. The purity of hydrogen gas is 99.9%, the dew point is less than -40°C, and the…