Red Crushed SilverFor example, if you make the electrical conductivity of mercury 1, the electrical conductivity of copper is 57, and the electrical conductivity of silver is 59, which is the first place. Therefore, silver is often used to make extremely sensitive physical instrument components, a variety of automated devices, rockets, submarines, computers, nuclear devices, and communications systems, all of which have a large number of points of contact in the equipment are made of silver. During use, each contact has to work millions of times and must be wear-resistant and reliable to withstand the rigors of the job, and silver is perfectly suited to meet these requirements. If rare earth elements are added to silver, the performance will be even better. With this kind of silver with rare earth elements made of contact points, life can be extended several times.
Element use:Used in the production of alloys, soldering flux, silver foil, silver salts, chemical instruments, etc., and used in the production of silver coins and silver base, etc..
The most important compound of silver is silver nitrate. In medical treatment, the aqueous solution of silver nitrate is often used as eye drops, silver bars because silver ions can strongly kill germs.
The so-called pure silver, purity is generally 999 (April 2011 price of about 8.3 yuan / gram). Silver nitrate is decomposed into silver when it sees light or meets organic matter. Silver is grayish black if it is a very small particle. This compound is used for silver plating or the manufacture of other silver compounds, the compound AgBr (silver bromide) is the main ingredient in camera negatives, and the compound AgI (silver iodide) is sprinkled into the clouds in powder form, which can have the effect of artificial rainfall.
Silver oxide is very easy to dissolve in ammonia, the solution is left for a long time, sometimes precipitated a strong explosive black crystals. Silver oxide is used as a coloring agent in the glass industry. The chemical formula of silver oxide Ag2O. brown cubic crystal system crystals or brown-black powder. Bond length (Ag-O) 205 pm. 200 degrees decomposition, release oxygen. Density 7.220g/cm3 (25 degrees). Gradually decompose in the presence of light. Reacts with sulfuric acid to form silver sulfate. Insoluble in water. Soluble in ammonia, sodium hydroxide solution, dilute nitric acid, sodium thiosulfate solution. Insoluble in ethanol. Produced by silver nitrate solution and sodium hydroxide solution. Organic synthesis with hydroxyl instead of halogen with wet Ag2O as a catalyst. Also used as an antiseptic, electronic device materials.
Silver nitrate silver bromide photographic effect, used to manufacture photographic film photographic layer. Silver jewelry and silverware with good reflectivity, polished to achieve a high degree of brightness, in jewelry and home decorations in a wide range of uses.
Silver coins were once prevalent as legal tender in countries on the silver standard. But with the reform of the monetary system and the creation of credit money, silver coins were gradually withdrawn from circulation. The silver coins minted are mainly investment silver coins and commemorative silver coins.
Silver ions and silver-containing compounds can kill or inhibit bacteria, viruses, algae, and fungi, and because of its disease-fighting effects, it is also known as a biophilic metal. Look forward to adopting yo.