2. Palladium is mainly used as catalyst in chemistry; Palladium forms alloys with ruthenium, iridium, silver, gold and copper. , can improve the resistivity, hardness and strength of palladium, and can be used to manufacture precision resistors, jewelry, etc. The most common and best-selling alloy of palladium jewelry is palladium.
3. It is mainly used to make catalysts, and also used to make dental materials, watches and surgical instruments.
4. Palladium chloride is also used for electroplating; Palladium chloride and its related chlorides are used for cyclic refining and as a source for producing pure sponge palladium by thermal decomposition.
Physical and chemical properties of extended data palladium;
Palladium is a silvery white transition metal, which is soft, malleable and malleable, and can be forged, rolled and drawn. Blocky palladium can absorb a lot of hydrogen, which makes its volume expand obviously, become brittle and even break into pieces. At room temperature, 1 volume of sponge palladium can absorb 900 volumes of hydrogen, and 1 volume of colloidal palladium can absorb 1200 volumes of hydrogen.
The main compounds are palladium dichloride, sodium palladium tetrachloride and palladium tetrachlorotetramine. Chemical properties are inactive and stable in air and humid environment at room temperature. When heated to 800℃, a palladium oxide film was formed on the surface of palladium. Palladium can resist the corrosion of hydrofluoric acid, phosphoric acid, perchloric acid, hydrochloric acid and sulfuric acid vapor, but it is easily soluble in aqua regia, hot sulfuric acid and concentrated nitric acid.
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