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Violet tungsten oxide powder may be applied for producing heat insulation coating. And this type of thermal insulation coating has been gradually applied to places requiring high heat insulation and high visible light transmittance such as buildings and automobiles. Ultrafine tungsten powder and ultrafine tungsten carbide powder can be obtained by using violet tungsten oxide, yellow tungsten oxide and blue tungsten oxide as raw materials separately (under the same hydrogen reduction and carbonization process conditions). Tungsten oxides including violet tungsten…

Violet tungsten oxide powder may be used for the preparation of thermal insulation coating. And the application of violet tungsten oxide in the field of thermal insulation has been gradually promoted as it has the characteristics of environmental protection, high heat insulation performance and high visible light transmittance performance. The violet tungsten oxide is a raw material suitable for preparing ultrafine crystal cemented carbide, as the tungsten powder obtained by the hydrogen reduction of violet tungsten oxide is fine and…

Violet tungsten oxide powder may be used to prepare near-infrared shielding material (heat insulating material), which has been gradually applied to the heat insulation fields of building and automobile. The violet tungsten oxide has unique fine needle-like crystal morphology, and its polymer resembles a loose sponge. Compared with yellow tungsten oxide (YTO) and blue tungsten oxide (BTO), the bulk density of violet tungsten oxide is much smaller than that of YTO and BTO. The BET of violet tungsten oxide is…

Violet tungsten oxide powder may be used to produce thermal insulation paper with high transparency so that it can be applied to fields such as building energy-saving films and car films. Compared with tungsten oxide products such as yellow tungsten oxide, blue tungsten oxide and ammonium tungsten bronze, violet tungsten oxide has the most special morphology. Each particle of violet tungsten oxide is a loose particle group composed of needle-like or rod-shaped crystal grains. The particle structure has a large…

Violet tungsten oxide powder may be applied for producing thermal insulation film, and therefore be widely used in the fields of heat insulation such as building glass and automobile glass. The appearance of violet tungsten oxide is generally light violet or blue violet. The main components and physical properties of violet tungsten oxide are as follows: W18O49 content is more than 97%, oxygen index is less than or equal to 2.72, specific surface is 1.5~3.0m2/g, and bulk density is 1.9~2.3g/cm3.…

Violet tungsten oxide powder may be used to prepare ceramic microsphere. And violet tungsten oxide may be produced by calcining ammonium paratungstate (APT) under a mild reducing atmosphere. In this process, what effects do the furnace temperature, feed amount and furnace speed have on the preparation of violet tungsten oxide? Other process conditions unchanged, the morphology of violet tungsten oxide appears as a needle-like crystal form if the furnace temperature is too low; the morphology of violet tungsten oxide appears…

Violet tungsten oxide powder may be applied for the production of thermal insulation masterbatch. Such masterbatch may be applied to producing thermal insulating film with the characteristics of high transparency, high heat insulation and excellent weather resistance so that it can be used in the heat insulation fields of construction and automotive. The preparation of violet tungsten oxide is generally using ammonium paratungstate (APT) as raw material, and is reduced in an industrial rotary tube furnace under certain conditions, such…

Violet tungsten oxide powder may be applied for manufacturing nano-ceramic color master. Violet tungsten oxide can also be used to prepare tungsten powder and tungsten carbide powder with the characteristics of fine and uniform particle size, concentrated particle size distribution, and good dispersibility. Therefore, violet tungsten oxide has a good development prospect in the production of W powder and WC powder. Some researchers have studied the effects of yellow tungsten oxide, blue tungsten oxide and violet tungsten oxide produced by…

Violet tungsten oxide powder may be used to produce nano-ceramic dispersion solution for applying in building heat insulation film or car film. Violet tungsten oxide (W18O49/WO2.72) is one of tungsten oxides. The other three kinds of tungsten oxides are yellow tungsten oxide (WO3), blue tungsten oxide (W20O58/WO2.90) and tungsten dioxide (WO2). All of the above four kinds of tungsten oxides can be used as raw materials for the production of tungsten powder. As early as the 1950s, tungsten acid and…

Violet tungsten oxide powder may be used for preparing thermal insulation dispersion. And violet tungsten oxide can be prepared by APT hydrogen reduction method. It has been found by studying the preparation process that the formation conditions of violet tungsten oxide are related to the reduction temperature, hydrogen humidity, heating rate, grain size of APT, thickness of the layer, etc. The particle size of violet tungsten oxide increases with the increase of heating rate and reduction temperature. And it also…