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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…

Nano violet tungsten oxide powder may be applied for preparing nano-ceramic color master. And the obtained color master has the advantages of high heat insulation and high transparency so that it can be applied for the production of heat insulating film. Violet tungsten oxide can also be used as a raw material for preparing submicron tungsten powder. Submicron W powder may be prepared by cyclic reduction oxidation method using a relatively simple phase composition of violet tungsten oxide. Compared with…

Nano violet tungsten oxide powder may be applied for the manufacture of nano-ceramic dispersion solution, which may be applied to prepare heat insulating film. The violet tungsten oxide can also be reduced in a hydrogen atmosphere to obtain tungsten powder, and the tungsten powder and carbon are mixed, carbonizing to obtain tungsten carbide powder, and then the morphology change of the obtained tungsten carbide powder is studied by transmission electron microscopy and scanning electron microscopy, as shown in the following…

Nano violet tungsten oxide powder may be used for the production of thermal insulation dispersion, which may be applied in the fields of heat insulation in the form of a thin film, such as building heat insulation film and car heat insulation film. Violet tungsten oxide can be used to prepare tungsten powder and tungsten carbide powder. Among them, there are two reasons for the coarser grain size of tungsten carbide than tungsten powder: 1. These powders have different densities.…