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Industrially, the raw material mineral wolframite is extracted with sodium hydroxide aqueous solution to make crude sodium tungstate, and then the crude product is made into WO3?2H2O with acid, sodium hydroxide is used to make Na2WO4?2H2O. It should be noted that WO3?2H2O is difficult to completely convert into Na2WO4?2H2O. How to determine the content of tungsten trioxide in sodium tungstate? The content of tungsten trioxide in sodium tungstate is generally determined by the cinchonine gravimetric method. Below, let’s take a…

As we all know, there are many factors that affect tungsten powder property, but the main factors are nothing more than the production process of the tungsten powder, the properties and characteristics of the raw materials used. At present, many researches are on the reduction process, including reduction temperature, boat pushing speed, loading capacity and method, reduction atmosphere, etc. During the production and research process, researchers have found that the properties of different tungsten oxide raw materials have an effect…

In addition to the excellent stability of the monoclinic blue tungsten oxide ceramic material, it also has a very strong optical absorption effect in the near-infrared light region, and has good biological compatibility. It can effectively convert light energy into heat energy. Killing cancer cells has potential applications in clinical tumor photothermal therapy. As a conventional ceramic material, monoclinic phase tungsten trioxide (WO3) has high chemical inertness and good biocompatibility. It can generate singlet oxygen under light. Therefore, it is…

At present, tungsten oxide has been widely used in chemical sensors, optoelectronic devices, fuel cells and other fields. It is a new hot spot in the research of nano-metal oxides. However, the current domestic research on nano-tungsten oxide materials is mainly concentrated in the two advantageous areas of electrochromic and gas sensors. There are few studies on the photocatalytic and photochromic properties of tungsten oxide, especially for sol-gel preparation. The research on photochromic tungsten oxide is rarely reported in China.…

Scientists have identified a class of materials that could prospectively be used for developing even higher power batteries. The team, from the University of Cambridge, used materials that had a complex crystalline structure and discovered that lithium ions pass through them at rates far exceeding those of conventional electrode materials, which translates into a battery that charges considerably faster. Such materials, called niobium tungsten oxides, do not lead to higher energy densities upon being used under typical cycling rates. However,…

Recently, “the strongest brain” Central South University and the “shield giant” iron construction heavy industry marriage. What kind of spark will this shine? What kind of story will be created? It is bound to create an “iron-tooth steel tooth” that exerts the best performance of “Pangolin”! At this time, friends may ask: Is this “Pangolin” awkward? What is the “iron tooth steel tooth”? In fact, this is the main body of the “Pangolin” name is the shield machine! Then, what…

CCTV’s first large-scale popular science program broadcasts a section on the contents of China’s tank armor-piercing projectiles: China’s 59-type tank armor-piercing projectile instantly penetrates ten layers of steel plates, with a total wear depth of 1500mm. Therefore, for the most advanced 99A tanks in China, which are superior to the performance of the 59-2 tank, if it is a 125mm tungsten alloy armor-piercing projectile, the piercing depth should be greater than 1500mm. Military experts said that China’s strength in the…

A warship can carry thousands of tungsten alloy bombs, and its combat performance is comparable to that of medium-range missiles? This is sourced and will be discussed later. Presumably, the artisans should know that the United States regards the electromagnetic orbital gun as a subversive weapon capable of changing the rules of the war game. It is estimated that such a legend of the rivers and lakes, the US Navy has already put the electromagnetic railgun into the “cold palace”,…

According to experts, in the near future, tungsten oxide electrochromic glass can easily achieve warm winter and cool summer! It is said that this is a black technology achievement! Just press the power switch lightly to make the glass “discolor” instantly, from transparent to dark blue. Ordinary glass does not have thermal insulation, and this black technology can make the glass block most of the sunlight in the hot summer, reduce the indoor temperature, thus reducing air conditioning costs and…