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Violet tungsten oxide powder may be used to produce transparent thermal insulation nanopowder, and to prepare WC powder and W powder, so that the quality detection of violet tungsten oxide is particularly important. The following is a method for directly controlling and detecting the quality of violet tungsten oxide – colorimetric method. The colorimetric method uses several colors of violet tungsten oxide to make several types of violet tungsten oxide standards, by comparing their colors to determine quality. For the…

Nano violet tungsten oxide for producing heat insulating window glass can be used to prepare tungsten powder and tungsten carbide powder. The violet tungsten oxide will directly affect the production and quality of W powder and WC powder. Therefore, how to judge the quality of violet tungsten oxide is the research concern of producers. And it is also the concern that must be mastered by users. The detection of the original violet tungsten oxide is consistent with the yellow tungsten…

Nano violet tungsten oxide for producing window heat insulation film can be prepared by using APT as raw material in a rotary furnace under the conditions of wet hydrogen and high temperature. Some scholars have analyzed various parameters affecting the quality of violet tungsten oxide, and improved the rotary furnace, and successfully realized the continuous industrial production of violet tungsten oxide. The obtained violet tungsten oxide is fine and uniform with stable quality. The scholar found that: 1. Using the…

Nano violet tungsten oxide applying in thermal insulating glass is prepared by a light reduction method in an industrial rotary furnace (the raw material is APT). In order to realize the continuous industrial production of violet tungsten oxide with fine and uniform particle, and stable quality, scholars, after long-term production test and research, have found that the production of nano grain size violet tungsten oxide by rotary kiln should meet the following conditions: 1. The furnace tube has a certain…

Nano violet tungsten oxide for producing thermal insulation coating has a blue violet or violet red appearance. As can be seen from the image below, the appearance of the violet tungsten oxide powder maintains the appearance characteristics of the raw material APT. And the micro-morphology of violet tungsten oxide powder is different from other tungsten oxides, which are fine needle-like or rod-like crystals, forming arch bridges with each other. And the particle distribution is loose. The main components and physical…

Nano violet tungsten oxide for producing near-infrared shielding material can be prepared by APT hydrogen reduction method in an industrial rotary kiln under wet hydrogen and high temperature conditions. APT decomposes at a higher temperature to produce water vapor and NH3. And NH3 can be decomposed into N2 and H2 at high temperature. At the same time, H2 can lightly reduce and decompose APT to produce W18O49 phase. Since the volume of NH3 increases after decomposition, a large amount of…

Nano violet tungsten oxide for producing thermal insulation paper can be prepared by hydrogen reduction in an industrial rotary furnace under the conditions of wet hydrogen and high temperature with APT as raw material. Then, the four main process parameters affecting the performance of violet tungsten were selected as the research object, furnace temperature, furnace tube speed, feed rate and NH3 flow rate, to carry out the optimization experiment. And the experimental results are as follows: It can be seen…

Nano violet tungsten oxide may be applied for producing thermal insulation film with high transparency and excellent thermal insulation properties. This kind of heat insulation film has gradually entered the public’s field of vision as people’s demand for heat-insulating and transparent film has increased. The violet tungsten oxide can be prepared by APT hydrogen reduction method under wet hydrogen and high temperature conditions. Since the preparation of violet tungsten oxide needs to be carried out in a closed industrial rotary…

Nano violet tungsten oxide for producing ceramic microsphere can be prepared by using ammonium paratungstate (APT) as raw material, and performing hydrogen reduction in industrial rotary furnace under wet hydrogen and high temperature conditions. According to the APT hydrogen reduction method, the improved industrial rotary furnace is used for reduction. The liquid ammonia (first grade, NH3 content ≥99.8%) is vaporized and passed into the rotary kiln. And the screw feeder is used to feed the APT (with a WO3 content…

Nano violet tungsten oxide for preparing thermal insulation masterbatch is one of the most widely used raw materials in tungsten powder production. It is generally obtained by calcining in a rotary kiln with ammonium paratungstate (hereinafter referred to as APT) as a raw material. It is well known that the crystal integrity, uniformity, surface morphology, particle size and particle size distribution of tungsten carbide powder have a great influence on the properties of the alloy, and the properties of these…