palladium

1、 Basic characteristics

1. Appearance and color: Palladium powder usually appears as a powdery substance in shades of gray black or silver white.
2. Chemical properties: Palladium powder has stable chemical properties, is not easily oxidized, has the characteristics of an inert metal, and does not react with most acids and bases. But under high temperature and pressure, palladium powder can react with hydrogen to generate palladium hydride.
3. Physical properties: The density of palladium powder is approximately 12 grams per cubic centimeter, slightly lighter than silver and platinum. Its melting point is relatively high, about 1550 ° C, and its boiling point is even higher, about 2900 ° C.

2、 Main purpose

1. Catalyst: Palladium powder is widely used as a catalyst due to its ability to react with hydrogen gas. In various industries such as chemical, petroleum, and pharmaceutical, palladium catalysts can efficiently promote various chemical reactions such as hydrogenation, dehydrogenation, and cracking, improving production efficiency and product quality. For example, in the process of hydrogen purification, palladium powder can efficiently separate hydrogen gas and improve its purity.
2. Electronics industry: Palladium powder is widely used in the manufacturing of electronic components and semiconductor materials due to its excellent electronic properties. At the same time, palladium powder is also used to manufacture precision resistors, electrical contact materials, etc., which play a key role in the stable operation of electronic devices.
3. Aerospace: The aerospace industry has extremely high requirements for material properties, and palladium powder is used to manufacture key components such as high-temperature alloys and precision instruments due to its excellent high-temperature and corrosion resistance.
4. In the medical field, palladium powder is also used to manufacture dental materials, surgical instruments, and other medical devices, providing high-quality product solutions for the medical industry.
5. Other applications: Palladium powder is widely used in the manufacture of palladium alloys, palladium rods, palladium wires, and other products, as well as in scientific research such as titration analysis and ICP-AES.

3、 Production method

The production of palladium powder involves various complex chemical and physical processes, including:

1. Chemical deposition method: By reacting a solution containing palladium ions with reducing agents such as sodium ethylenediaminetetraacetate, sodium borohydride, etc., palladium precipitation is generated. After washing, drying and other steps, high-purity palladium powder is finally obtained.
2. Physical vapor deposition method: using physical means to deposit palladium atoms or molecules on the surface of a substrate, forming palladium powder. Among them, chemical vapor deposition (CVD) and physical vapor deposition (PVD) are the two main technologies.
3. Sol gel method: the solution containing palladium ion is mixed with gel agent to form sol. After heating or chemical reaction, the sol gel is formed, and finally palladium gel particles are obtained. After heat treatment, gel particles are transformed into palladium powder.
4. Reduction method: Directly reduce palladium compounds to palladium powder, commonly used reducing agents include hydrogen, sodium hydroxide, sodium borohydride, etc.

Product introduction: Amorphous or approximately spherical, pure, uniform color

Application recommendation: Mainly used in microelectronic materials as the main raw material for silver palladium conductor paste

Technical indicators:

Loose density: 0.3~0.4 g/cm3

Compaction density: 0.4~0.6 g/cm3

Average particle size: 3.0~6.0 μ m (laser diffraction method)

Specific surface area: 8.0~12.0 m2/g

Purity: ≥ Pd99.95% (spectral analysis)