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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…

Nano violet tungsten oxide for producing nano-ceramic color master has a unique fine needle-like structure. Compared with nano blue tungsten oxide and nano yellow tungsten oxide, nano violet tungsten oxide has a special surface and the highest chemical activity, and is more suitable for the production of ultrafine grain size tungsten powder. The tungsten carbide powder prepared by using nano grain size violet tungsten oxide has a fine particle size and a narrow particle size distribution without structural aggregate block.…

Nano violet tungsten oxide for preparing nano-ceramic dispersion solution may be produced by a hydrogen reduction method. And as you may have known, yellow tungsten oxide (tungsten trioxide) and violet tungsten oxide can also be used to produce such thermal insulation dispersion solution. Using the same batch of APT for hydrogen reduction, triclinic yellow tungsten oxide (WO3), hexagonal blue tungsten oxide (ATB) and monoclinic violet tungsten oxide (W18O49) can be obtained. That is to say, three different phases and different…

Nano violet tungsten oxide may be applied for manufacturing thermal insulation dispersion, in which the violet tungsten oxide nanoparticles can effectively shield the heat in the near-infrared and far-infrared regions. And therefore, it can maintain lower room temperature in the hot summer and control heat loss in the winter, thereby reducing the energy charge on air conditioning. The same batch of APT is used to prepare violet tungsten oxide, yellow tungsten oxide and blue tungsten oxide respectively; then, the three…