Nano Nd_2O_3 powder material was prepared by homogeneous precipitation method. The preparation process, the kinetics of precipitation reaction and thermal decomposition reaction of precursor precipitate were studied. Other lanthanide elements (except promethium) and yttrium oxide were prepared. The main research contents and results are [...]
Ammonium paratungstate is heated in a rotary furnace with wet dust collection, the vaporized crystal water is discharged first, and then a large amount of combined ammonia is lost, and finally tungsten trioxide (industrial) is formed.
Blue tungsten oxide has the characteristics of good activity, [...]
Preparation of Ruthenium trichloride directly from ruthenium-containing waste material Ruthenium trichloride is one of the most important compounds of ruthenium and is an important chemical raw material in the fields of heterogeneous catalysis, homogeneous catalysis, electroplating, coating and so on. A method of preparing [...]
Nickel metal hydride batteries (MH-Ni) with high specific energy and excellent performance are widely used in electronics, communications, computers and other industries, and will also be widely used in the field of electric vehicles. As a positive active substance, the performance of nickel hydroxide [...]
Geneva, Feb. 15 (xinhua) — vanadium dioxide is an ideal choice to replace silicon for a new generation of low-power electronic devices due to its unique properties. Swiss researchers have demonstrated the potential of using vanadium dioxide in aerospace communications (600677) systems to enable [...]
Barium titanate ceramics are ceramic materials with barium titanate (BaTiO3) or its solid solution as the main crystal phase. The main raw materials are barium carbonate and titanium dioxide. Generally, barium titanate is synthesized at 1200℃ first, and then modified oxide is added. After [...]
1. Heat-conducting silica gel and epoxy resin:
Ultra-high thermal conductivity nano-aln composite silica gel has good thermal conductivity, good electrical insulation, wide electrical insulation service temperature (working temperature -60℃- 200℃), lower consistency and good construction performance. Products have reached or exceeded imported products, because can [...]
Cesium carbonate is an inorganic compound. White solid at room temperature and pressure. It is soluble in water and absorbs moisture quickly when exposed to air. Cesium carbonate aqueous solution is strongly alkaline and can react with acid to form the corresponding cesium salt [...]
In recent years, the methods of preparing ultrafine or nanometer WC powder mainly include: mechanical alloying, direct reduction carbonization, sol-gel, gas carbonization, fixed-bed chemical vapor method, plasma method, etc.
Mechanical alloying
Grahame, etc by mechanical alloying method, first the W powder mixes with C powder by [...]
Boron carbide is a kind of super-hard compound in nature. In normal state, its hardness is second only to diamond and cubic boron nitride, and it is hardest at high temperature (about 1000 degrees Celsius). At the same time, boron carbide is a kind [...]