日韩aaaaav在线_国产519AV视频。_物业妻 AV一区_久久久久网在线播放_特黄一级A片_日韩性爱av手机看片

1. All
2. Industry
3. Company
4. Application

Application

• Testing the Content of Precious Metal Ruthenium: Latest Market Trends in High Purity Ruthenium Palladium Powder Recycling

  Ruthenium is a hard and brittle multivalent rare metal element with a light gray color, with the element symbol Ru. It is a member of the platinum group metals and contains only one billionth of the earth's crust. It is one of the rarest metals with stable properties and strong corrosion resistance. It can withstand the corrosion of hydrochloric acid, sulfuric acid, nitric acid, and aqua regia at room temperature. Ruthenium is the cheapest metal in the platinum group, although other metals such as platinum and palladium are more abundant than ruthenium.

  2021-04-06 2816

• What's wrong with platinum and diamond rings turning yellow?

  Platinum is a natural white metal with the property of never changing color, which is loved by young consumers. This has also led many couples to choose platinum diamond rings as their first choice for wedding rings. But during the wearing process, some consumers also find that their platinum diamond rings turn yellow. So, what is the reason for platinum diamond rings turning yellow?

  2021-04-06 3129

• Scientists invent new technologies to promote precious metal recovery

  Recently, a team led by Li Hexing and Bian Zhenfeng from the Key Laboratory of Resource Chemistry of the Ministry of Education at Shanghai Normal University has invented the "photocatalytic dissolution of precious metals" technology, which has achieved efficient and green recovery of precious metals in scrapped electronic devices and is expected to promote changes in the field of precious metal smelting. The figure shows the electronic equipment waste before and after being treated by the "photocatalytic precious metal dissolution" technology by researchers, and the electronic equipment waste after treatment is shown on the right.

  2021-04-06 2675