What are the uses of silver?

1, electronic appliances

Electronic appliances are the industry with the largest amount of silver, and their uses are divided into electrical contact materials, composite materials and welding materials. Silver and silver-based electrical contact materials can be divided into pure silver, silver alloy, silver oxide and sintered alloy. The annual output of silver and silver-based electrical contact materials in the world is about 2900~3000t, and composite materials are prepared by composite technology, which can be divided into silver alloy composite materials and silver-based composite materials.

2. Photosensitive materials

Silver halide photosensitive material is one of the fields with the largest amount of silver. At present, several photosensitive materials with the largest production and sales volume are photographic film, photographic paper, X-ray film, fluorescent information recording film, electron microscope photographic film and printing film.

3. Chemistry and chemical engineering

Silver has two main uses in this respect. One kind is silver catalyst, which is widely used in redox and polymerization reactions, and is used to treat industrial waste gas containing sulfide. Second, industrial preparations for electronic plating, such as silver paste and silver potassium cyanide.

4. Craft ornaments

Silver is favored by people (especially women) because of its attractive white luster, high chemical stability and collection and ornamental value. Therefore, it has the reputation of women's metal, and is widely used as jewelry, decorations, silverware, tableware, congratulatory gifts, medals, commemorative coins and so on.

5. Currency application:

(1) Silver Circle

Silver dollar, also known as "silver dollar", was a currency circulating in China market in the past. There are many kinds of Yang Long in the late Qing Dynasty, such as Sun Yat-sen's commemorative coin, Yuan Shikai's silver dollar statue, Sun Yat-sen's ship statue, China's Soviet currency and Sichuan's "China" currency. In addition, some foreign silver dollars, such as standing in the ocean and sitting in the ocean, Eagle Ocean and Japanese Yang Long, are also circulating in China.

(2) Silver bars

They are long in shape and vary in size, weighing about 300 grams, about 950‰ with good color, generally about 900‰, and 925‰ are the most common materials for making silver ornaments. Below 900‰ is grayish white, hard with copper hammer, no honeycomb at the bottom, and the surface is black and red after burning.

(3) Silver brick

Rectangular silver ingots, weighing about 2000 grams, also have hundreds of grams, with a color of 950‰, mostly 980‰. Those with fineness below 900‰ have thick wrinkled skin and black and red hair on their faces.

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