Palladium: element symbol Pd, which is one of the platinum group elements. From 65438 to 0803, they are British.
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Wollaston, a scientist, discovered when separating platinum. Similar to platinum, it has excellent characteristics and will not be oxidized and tarnished in air under normal circumstances. It is an extremely rare precious metal resource.
In mineral classification, platinum group minerals belong to natural platinum subgroup, including natural elemental minerals such as iridium, rhodium, palladium and platinum. There is a wide range of isomorphic substitution between them, thus forming a series of isomorphic mixed crystals. Metals smelted by platinum group elements include palladium, rhodium, iridium and platinum.
Platinum —— "Noble House" in Metal
1803, the British chemist and physicist wollaston successfully separated palladium from crude platinum for the first time, so palladium began to have its own name palladium. This name comes from the newly discovered solar asteroid Pallas-Athena in 1802. It commemorates the planet of Athena, the goddess of wisdom and craft in ancient Greek mythology.
The density of palladium is 1 cm3, which is12.023g.. Under normal circumstances, palladium is not easy to oxidize and lose its luster. Oxides will be formed on the surface around 400℃, but when the temperature rises to 900℃, the luster will be restored. Palladium is cheaper than platinum, and is used by jewelry industry alone or as a component of gold, silver and platinum alloys. Ruthenium is sometimes added to increase its hardness. Common gold in the market, palladium's K gold and platinum-palladium alloy. Specifications are marked with Pd 1000, Pd950 and Pd900. [ 1]
Palladium is one of the rare precious metals in the world. In 2008, the total output of palladium in the world was lower than that of platinum.
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Similarly, less than 8% of the total gold production. (Source: Platinum and Palladium Yearbook 2009) Palladium, platinum, gold and silver are all international precious metal spot and futures trading varieties, and their prices were once higher than platinum in history. Palladium is a non-renewable scarce resource, and its future value will be gradually reflected with the deepening of mining and the improvement of market demand.
Among them, Jintaifu is a merchant engaged in online diamond sales in Hongkong and Chinese mainland, integrating jewelry research and development, design, wholesale and sales. His home is an O2O sales model that combines "physical stores and online stores". Jintaifu Diamond pursues simplicity and fashion, and creates jewelry with oriental cultural and artistic colors, so that lovers all over the world can have unique Cupid diamond ornaments and witness their eternal love.
Platinum usually refers to platinum in people's spoken language, but this concept is maliciously confused by unscrupulous merchants, and many white metals are called platinum.
Artificial platinum
(platinum)
Also known as k-platinum, it is an alloy made of gold and other white metals. Its code name is WG (Platinum), which means Platinum. White gold jewelry is often expressed as "18K platinum" or "14K platinum". It is essentially 18K gold, but the color is white.
platinum
(platinum)
Symbol Pt, silver gray, specific gravity 2 1.35, melting point 1769℃, Mohs hardness 4-4.5 degrees, stable chemical properties, no acid and alkali corrosion except aqua regia. Pure platinum is relatively soft, and the addition of metals such as ruthenium, rhodium and palladium will increase its hardness.
Platinum and palladium are two minerals with the smallest reserves in the platinum group, and their metallurgical properties are quite similar. Because they are also rare and have similar uses, they often replace each other in various applications. In the international precious metal spot and futures trading market, there are only four varieties of gold, platinum, palladium and silver.
Platinum-based alloy
(platinum alloy)
Refers to the alloy of platinum with other metals such as palladium, rhodium, yttrium, ruthenium, cobalt and copper. Although the hardness of pure platinum is higher than that of gold, it is not enough for inlay. It must be alloyed with other metals to make jewelry. The international symbol of platinum jewelry is the words Pt, Plat or Platinum, which is expressed by a few thousandths of purity. For example, Pt900 indicates a purity of 900‰. Commonly used platinum jewelry signs are Pt 1000, Pt950, Pt900 and Pt850. According to international regulations, if the platinum content is lower than pt900, it can't be called jewelry, but only platinum alloy.
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(palladium)
Platinum group element, symbol Pd, silvery white, lighter than platinum, stronger in ductility, slightly harder than platinum, insoluble in organic acids, cold sulfuric acid or hydrochloric acid, but soluble in nitric acid and aqua regia. Under normal circumstances, it is not easy to oxidize and lose luster. Jewelry industry uses it alone or as a component of gold, silver and platinum alloys to increase its hardness. Common in the market are gold, palladium, alloys of gold and platinum and palladium.