| Certification: | ISO |
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| Shape: | Block |
| Purification Method: | Electromigration |
| Preparation Method: | Electrolysis of Fused Salts |
| Application: | Catalyst Masses, Energy Materials, Photoelectric Material, Photorecording Material, Medicine, Astronavigation |
| Product Type: | Rare Earth Oxide |
| Samples: |
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| Customization: |
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Palladium metal
Palladium alloy tube
Palladium tube
Pd-Au alloy
20%Pd-30%Au
Pd-Ag alloy
Palladium-iridium alloy
Pd-Ir alloy
Pd/Sn alloy
Palladium (Palladium), is the fifth cycle group platinum element, element symbol Pd, the elemental is silver white transition metal, soft, has good ductility and plasticity, can be forged, calendering and drawing. The bulk metal palladium can absorb a large amount of hydrogen, which makes the volume expand significantly, become brittle and even break into fragments.
Palladium was discovered from platinum ore in 1803 by British chemist Vallaston. Palladium is an indispensable key material in aerospace, aviation and other high-tech fields as well as automobile manufacturing.
Palladium is a silver-white transition metal, which is soft and has good malleability and plasticity. It can be forged, calendered and drawn. The bulk metal palladium can absorb a large amount of hydrogen, which makes the volume expand significantly, become brittle and even break into fragments.
At room temperature, one volume of palladium sponge can absorb 900 volume of hydrogen, and one volume of colloidal palladium can absorb 1200 volume of hydrogen. Heating to 40 ~ 50ºC, most of the absorbed hydrogen is released, widely used as gas reaction, especially hydrogenation or dehydrogenation catalyst, but also can make resistance wire, watch alloy, etc.
Group VIII platinum element in the fifth cycle
Element type: Metallic element
Atomic number: 46
Number of protons: 46
Atomic weight: 106.42
Melting point: 1554ºC
Boiling point: 2970ºC
Density: 12.02g/cm3 (20ºC)
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Palladium is an indispensable key material in aerospace, aviation, navigation, weapons, nuclear energy and other high-tech fields as well as automobile manufacturing industry. It is also an investment variety that cannot be ignored in the international precious metal investment market.
Palladium chloride is also used in electroplating; Palladium chloride and related chlorides are used in cyclic refining and as a source of pure palladium sponge by thermal decomposition. Palladium monoxide (PdO) and palladium hydroxide [Pd(OH)2] can be used as sources of palladium catalysts. Sodium tetranitropalladate [Na2Pd(NO3)4] and other complex salts are used as the main components of electroplating solution.
Palladium is mainly used as a catalyst in chemistry; Palladium is fused with ruthenium, iridium, silver, gold, copper and other alloys, can improve the resistivity, hardness and strength of palladium, used in the manufacture of precision resistance, jewelry, etc. The most common and most marketable alloy for palladium jewelry is palladium.
It is mainly used in the manufacture of catalysts, but also in the manufacture of dental materials, watches and surgical instruments.
Palladium alloy tube
Commonly known as palladium tube, used for hydrogen purification. Pure palladium has poor mechanical properties and is easy to hydrogen embrittance, so the material of palladium tube is generally an alloy formed by palladium and group 1B and VIII elements. The most commonly used palladium tube material consists of about 25% silver and other components (such as gold). 5% [4].
Palladium alloy
Alloys composed of palladium and other elements mainly include [5] :
(1) palladium gold alloy Pd-Au alloy, containing more than 20% gold Au alloy insoluble in , due to the high melting point and corrosion resistance of this kind of alloy, it is used to manufacture chemical vessels; Alloys containing 20%Pd-30%Au are used to make artificial fiber drawing dies.
(2) Pd-Ag alloy, the corrosion resistance of the alloy containing less than 50% silver Ag is close to palladium, the addition of gold and platinum can improve the performance of the alloy, Pd-Ag alloy containing 50%Ag and 10%Pt or Au can be used to manufacture corrosion resistant parts and watch cases of optical instruments
(3) Palladium-iridium alloy PD-IR alloy, Iridium Ir can significantly improve the corrosion resistance of Pd, and Pd-IR alloy is used as an electrical contact point.
Colloidal palladium
The earliest colloidal palladium was invented by Shipley [6], which was prepared by the reaction of palladium chloride with stannous chloride. The diameter of colloidal palladium particles is between 1-100nm, and the smaller the size of palladium particles, the higher the catalytic activity and the better the stability. The most important feature of the colloidal palladium activation solution is that the sensitization and activation are concentrated in the impregnation process of a solution. When the copper coated foil after palladium drilling and cleaning is immersed in it, the colloidal palladium particles adsorb on the pore wall insulation material and copper foil surface to form a catalytic layer. On the activated copper foil surface, there is no palladium ion which can be replaced by replacement, so there is no loose copper replacement layer.
Colloidal palladium activation solution is a colloidal solution with atomic palladium as a colloidal nucleus. Colloidal palladium was prepared by the reaction of PdCl2 and reducing agent. Reducing agents include sodium hypophosphate, formaldehyde, ascorbic acid, dimethylamine borane, sodium phosphite, sodium borohydride, hydrazine hydrate and stannous compounds, of which SnCl2 is the most commonly used.
Pd/Sn colloidal catalyst is the most widely used colloidal palladium in industry. It is prepared by the reaction of PdCl2 and SnCl2 in acidic solution. The colloidal core is palladium, and the outer layer is hydrated divalent and quadruvalent tin ions, and excessive Sn2+ plays a key role in the stability of the catalytic solution. Modern colloidal catalysts also contain large amounts of acid or salt.
Mohs hardness: 4.75
The propagation rate of sound in it: 3070m/s
Element content: 0.003ppm in the sun, 0.000000019ppm on the surface of the Pacific Ocean, 0.0006ppm in the crust
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