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顯示從 6月, 2022 起發佈的文章
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  Overview of Tungsten Disulfide Tungsten disulfide  as a potential battery material is also expected to benefit from more market replenishment. Tungsten disulfide is a layered material with remarkable surface effects, electron mobility, thermochemical stability and high electron density of states. It has been widely used for lithium and sodium storage. For example, nanocomposites as conductive additives or graphene composites as battery cathode materials can exhibit higher specific capacity and discharge efficiency, making up for the deficiencies of single-component WS2 or C as anode materials. The advent of sodium batteries is expected to alleviate the current shortage of lithium resources on the rapid development of the new energy industry, and will further stimulate the application of transition metal dichalcogenides such as tungsten disulfide WS2 in the field of power storage.  Lithium-ion batteries are a key raw material for developing energy devices and realizing the vision of &

The King of Materials - Graphene

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  Graphene overview Graphene  is a new material composed of single layers of carbon atoms tightly packed together to form a hexagonal honeycomb lattice. In other words, it is a two-dimensional carbon material, an allotrope of the element carbon. Graphene has only 0.142 nanometers of molecular bonds and 0.335 nanometers of interplanar spacing. It is much shorter than bacteria, about four atoms in size. Graphene is by far the thinnest compound ever discovered. It's only one atom thick. It is also the lightest material and best conductor of electricity in the world.  Graphene has been discovered in nature since 1948. But at the time, it was difficult to separate graphene from its monolayer structure, because graphene is all aggregated, just like graphite, which contains about three million layers of graphene per millimeter. So for a long time, graphene was considered non-existent. It wasn't until 2004 that scientists Andrei Geim and Konstantin Voselov at the University of Manchest

Overview and Application of Nickel Alloys

  Overview of Nitinol Powder Nitinol  is a nickel-titanium alloy containing about 50% nickel. It combines two materials to provide more desirable properties, such as higher strength or corrosion resistance. Due to its unique properties, it is used in a variety of devices across multiple industries. Although discovered in the early 1960s, nitinol took decades to reach the market due to difficulties encountered during processing and manufacturing. In fact, most of Nitinol's many uses have been realized since the mid-1990s, when its usefulness in a wide range of applications stemmed from its shape-memory and superelastic properties. Shape memory means that nitinol can change into a new form at one temperature, such as below normal body temperature, and then return to its original shape when heated above its transition temperature. Nitinol is a shape memory alloy, a special alloy that can automatically restore its plastic deformation to its original shape at a certain temperature. Its

Are there any prohibited items that should be paid special attention to when sending international express?

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  Prohibited goods mainly include 1. Explosive, flammable, corrosive, toxic, strong acid-base and radioactive dangerous items, such as detonators, gunpowder, firecrackers, gasoline, alcohol, kerosene, tung oil, lacquer, matches, pesticides, etc. are all listed in the chemical Chemical products in the "Practical Handbook of Dangerous Chemicals" published by Industry Press. 2. Narcotics and psychotropic substances, such as opium, morphine, cocaine (Kogan), etc.; items prohibited from circulation or delivery by national laws, such as arms, domestic or foreign currencies, etc.; 3. Perishable items, all kinds of live animals (such as fresh fish, fresh meat, etc.). 4. Items that hinder public health, such as bones (including incinerated bones), animal skins that have not been nitrated, animal bones that have not been made with medicine, etc. 5. Reactionary newspapers, books, windows or obscene materials, etc. 6. If the chemical product you send is not listed in the "Practical

Physical and chemical properties and application of zirconium silicide ZrSi2 powder

  Overview of Zirconium Silicide ZrSi2 Powder Zirconium (IV) silicide  is an inorganic compound composed of zirconium and zirconium atoms. Zirconium silicide or zirconium disilicide, chemical formula ZrSi2, is a steel gray rhombus lustrous crystal with a relative density of 4.8822. Zirconium silicide is insoluble in water, mineral acids and aqua regia, but soluble in hydrofluoric acid.  Zirconium silicide ZrSi2 powder (CAS 12039-90-6) has high melting point, high corrosion resistance, high oxidation resistance, good electrical conductivity, high temperature ductility, and the intermediate phase of binary alloy system. Zirconium silicide is used as raw material powder for fine ceramics. Zirconium disilicide ZrSi2, molecular weight 147.39, density 4.88, melting point: 1620°C (1790°C), lattice constant: a=0.372nm, b=1.476nm, c=0.367nm. Microhardness (kg/mm2): 1063, heat of formation (kJ/mol): 62.8. Gray square crystalline powder, stable under normal temperature and pressure. Refractory me

Physical and chemical properties of molybdenum disulfide powder

  Overview of molybdenum disulfide powder Molybdenum disulfide  is an inorganic substance. The chemical formula is MoS2, which is the main component of molybdenite. It is a black solid powder with metallic luster. The melting point is 2375 ℃, the density is 4.80g/cm³ (14 ℃), and the Mohs hardness is 1.0-1.5. Molybdenum disulfide begins to decompose at 1370 °C and decomposes into molybdenum metal and sulfur at 1600 °C. Molybdenum disulfide is oxidized when heated to 315 ℃ in air. Molybdenum disulfide is insoluble in water, dilute acid and concentrated sulfuric acid, generally insoluble in other acids, alkalis and organic solvents, but soluble in aqua regia and boiled concentrated sulfuric acid. Slow oxidation occurs at 400 ℃ to form molybdenum trioxide. Molybdenum disulfide can be heated to react with chlorine to form molybdenum pentachloride. Molybdenum disulfide reacts with alkyl lithium under control to form an intercalation compound (intercalation compound) LixMoS2. If it reacts wit

Is cuprous oxide dangerous?

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  Overview of Cuprous Oxide Cu2O Powder Cuprous oxide , the chemical formula is Cu2O, is a monovalent cupric oxide, bright red powder solid, almost insoluble in water, disproportionate into divalent copper and copper elements in an acidic solution, and gradually oxidized into black copper oxide in humid air.  Cuprous oxide is commonly used as a pigment, biocide and antifouling agent in marine coatings. Rectifier diodes based on this material were used in industry as early as 1924, long before silicon became the standard. Copper(I) oxide is also responsible for the positive pink color of the Benedict test. Is cuprous oxide dangerous? Ingestion Toxic if swallowed. Skin May be harmful if absorbed through skin. May cause skin irritation. Eyes May cause eye irritation. Cuprous oxide Cu2O powder application Antifouling paint for ships and bottoms; it is an effective corrosion control. Glass and porcelain coatings. Used as p-type semiconductor material, used in the manufacture of photometer c