Tin metal pellets are usually granular objects made of the metal tin, and they may be used for various industrial purposes, such as welding materials, raw materials for metal alloy manufacturing, or as samples in some experimental studies.
Characteristics
Elemental Symbol and Atomic Number: The chemical symbol is Sn and the atomic number is 50. It is in Group 14 of the Periodic Table of the Elements and has some chemical similarity to Germanium and Lead, with two main oxidation states, +2 and +4, where the +4 valence is relatively more stable.
Density: 7.265 – 7.31 g/cm³ at 20 °C.
Melting point: Relatively low, about 232°C.
Boiling point: high, about 2602°C.
Colour and appearance: silvery grey with a metallic luster at room temperature.
Hardness: soft, about 1.5 on the Mohs hardness scale.
Thermal conductivity: high, about 66.6 W/(m・K).
Coefficient of thermal expansion: 22×10-⁶ /K.
Electrical Properties: It has a certain degree of electrical conductivity, but specific resistivity and other data may vary depending on factors such as the purity of the tin and the processing technology.
Applications
Soldering field
Electronic soldering: In the manufacture of electronic equipment, such as the soldering of circuit boards, Tin metal pellets are the main component of solder paste and solder wire. Due to its relatively low melting point (approx. 232°C), tin can be melted at low temperatures, making it easy to securely connect the pins of electronic components to the copper-clad wiring of circuit boards. Moreover, tin forms a good alloy with metals such as copper, ensuring reliable and electrically conductive solder joints.
Pipe soldering: For the connection of some small metal pipes, tin metal pellets can be used to make soft solder. This soft solder fills the gaps between the pipes to form a sealed joint and can withstand certain pressure and temperature variations.
Alloy Manufacturing
Tin-copper alloys: When alloyed with copper, the strength and wear resistance of the alloy can be improved. For example, when manufacturing bearings or gears for some mechanical parts, adding an appropriate amount of tin metal pellets to form tin-copper alloys can make the parts more wear-resistant during operation, while still maintaining good mechanical properties.
Tin-lead alloys (traditional applications): Although the use of lead has been restricted in some areas due to environmental and health concerns, tin-lead alloys are still valuable in some specific industrial or military applications. These alloys have good fluidity and a low melting point, making them suitable for casting small parts that require a high degree of precision.
Metallic coatings
Food packaging: The inner coating in food cans is widely used. Because tin is relatively harmless to the human body, and can effectively prevent the chemical reaction between food and metal can body, prolonging the shelf life of food. At the same time, tin coating can also provide a good gloss, making the cans look more attractive.
Protective Coating: For some metal products that are prone to rust, such as iron products, a tin solution made of small balls of tin metal is coated on the surface by hot-dip plating or electroplating to form a layer of protective film, preventing the iron products from being oxidised and rusted, and improving their service life.
Battery Technology
Alkaline batteries: Tin can be used as an additive in battery electrode materials. In alkaline zinc-manganese batteries, the addition of small amounts of tin can improve the performance of the electrodes, for example by increasing the discharge capacity and cycle life of the battery. This is due to tin’s ability to participate in the charge transfer during the electrode reaction, optimising the chemistry within the battery.
Chemical catalysis
Organic synthesis reactions: In some organic chemical reactions, tin metal pellets can act as catalysts. For example, in some ester exchange or condensation reactions, tin can provide suitable active sites to promote the reaction and improve the efficiency and selectivity of the reaction.
VI HALBLEITERMATERIAL GmbH (VIMATERIAL) employs a stringent quality assurance system to ensure the reliability of our product quality. Strict quality control is implemented throughout the entire production chain, and for defective products, we strictly enforce the principle of rework and redo. Each batch is released only after passing detailed specification tests.
Every batch of our materials is independently tested, and, if necessary, we send samples to certified companies for testing. We provide these documents and analysis certificates with the shipment to certify that our products meet the required standards.
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