Micro fine violet tungsten oxide has unique fine needle-like crystalline morphology, and its polymer appears loose pores, which has large interspace and low apparent density. It facilitates the infiltration of hydrogen and the escape of water vapor during the reduction process so that the reduction begins not only on the surface but also in the interior. Compared with yellow tungsten oxide (YTO) and blue tungsten oxide (BTO), the violet tungsten oxide (VTO) has the following advantages: 1. Smaller apparent density…
Tungsten Oxide
Violet nano tungsten oxide is the optimum raw material for producing ultrafine tungsten nanopowder with uniform grain size now as violet tungsten oxide is elongated columnar micro crystals with ammonium paratungstate fake crystalline accumulated. Its sharp split pore structure forms good permeability and can realize the fast recovery of dry hydrogen. At the same time, it can avoid generating β-W and α-W in WO2 period. Violet Nano Tungsten Oxide to Produce Nano Tungsten Powder Step one: The dry ammonium paratungstate…
Yellow nano tungsten oxide is prepared by hydrothermal method using tungstic acid as precursor and thiourea as basic adjuvant. The influence of different reaction conditions on the morphology and gas sensitivity of yellow tungsten oxide can be studied by changing the preparation temperature of the precursor and the content of thiourea. Transmission electron microscope (TEM) is used to characterize the synthesized product. The preparation temperature of precursor tungstic acid has important influence on yellow tungsten oxide synthesis. The spherical structure…
Dark blue nano tungsten oxide is a kind of semiconductor material with good chemical stability that may be applied in manufacturing semiconductor devices and electronic material of integrated circuits. There are studies on preparing a kind of tungsten oxide semiconductor battery, which has semiconductor chemical, photoelectric and thermoelectric and other properties. It is to say this kind of battery can produce electronic transport between two electrodes, and the battery current will increased significantly under the sun. Furthermore, the current increases…
Blue tungsten oxide nanopowder may be applied in the electronics industry. Electronics is the science of controlling electrical energy electrically and deals with electrical circuits that involve active electrical components such as vacuum tubes, transistors, diodes, integrated circuits, associated passive electrical components, and interconnection technologies. With the advent of flexible electronics, people have realized that the future electronic products have a significant breakthrough in the field of human-computer interaction, such as nowadays the more and more popular wearable electronic products,…
Blue nano tungsten oxide’s price affecting factors are mainly listed as follows: 1. The large production capacity of tungsten raw materials (tungsten concentrate, APT) cause an imbalance between supply and demand, directly affecting the price of blue tungsten oxide. 2. Tungsten mine cost and the nature of tungsten mine enterprise directly affect price. State-owned enterprises control a large number of BTO products and form price protection. 3. The production of tungsten concentrate is relatively concentrated, forming a certain price monopoly…
Micro fine blue tungsten oxide’s XPS experiment is using a surface-sensitive quantitative spectroscopic technique to systematically analyze the valence changes of blue tungsten oxide during tungsten powder producing from tungsten ore. XPS is the short for X-ray photoelectron spectroscopy. XPS Experiment of Micro Fine Blue Tungsten Oxide 1. The blue tungsten oxide powder sampled in the producing process is pressed into a φ11mm disc and delivered into ESCALAB-5. The multi-ding photoelectron spectrometer has an ultimate pressure of 2×10-10mbar. 2. An…
TBO is the abbreviation for tungsten blue oxide. It is not a defined tungsten compound, but a powdery mixture of multiple tungsten compounds whose chemical composition and physical properties are changing. Tungsten blue oxide is gradually replacing traditional tungstic acid and yellow tungsten oxide (tungsten trioxide) to become an important tungsten intermediate compound. TBO is generally composed of ammonium tungsten bronze, hydrogen tungsten bronze, tungsten trioxide (WO3, yellow tungsten oxide), β-tungsten oxide (WO2.9, blue tungsten oxide) and γ-tungsten oxide (WO2.72,…
BTO nanopowder has good catalytic performance and is the main catalyst or auxiliary catalyst in the petrochemical industry. It can also catalyze many reactions such as hydrogenation, dehydrogenation, oxidation, hydrocarbon isomerization, alkylation, and so on. Hydrogenation and dehydrogenation are two different reactions. Hydrogenation is a chemical reaction between molecular hydrogen (H2) and another compound or element, usually in the presence of a catalyst such as nickel, palladium or platinum. However, dehydrogenation refers to the chemical reaction which removes hydrogen from…
Ultrafine BTO powder may be prepared by APT calcination method. APT Calcination Method to Produce Blue Tungsten Oxide The principle is during heating process, keep positive pressure in furnace to prevent air goes in, and the ammonia generated by APT decomposition can split out hydrogen and nitrogen to keep the mild reducing atmosphere in furnace to obtain the final product – blue tungsten oxide. Besides that, in order to adjust phase composition of product, ammonia gas can be injected in…