Gate-shaped Tungsten Wire Tungsten Twisted Wire For Vacuum Coating

The tungsten stranded wire used in the electroplating industry is a special metal wire formed by twisting multiple high-purity tungsten wires. With its extremely high melting point (3410°C), excellent high-temperature stability, low evaporation rate, and strong creep resistance, it has become an indispensable key heating element in vacuum coating processes. In the electroplating industry, especially during physical vapor deposition (PVD), tungsten stranded wire primarily serves as an evaporation source carrier. When electrically heated, it rapidly vaporizes the coating materials (such as aluminum, chromium, nickel, or alloys) attached to it, thereby forming a uniform and dense thin film layer on the substrate surface.

Product features:

High-temperature resistance: During the vacuum coating process, due to the high-temperature environment generated by heating, the tungsten twisted wire needs to have good high-temperature resistance. Tungsten has a high melting point and excellent high-temperature stability, so the tungsten-stranded wire can withstand the heating and evaporation process under high-temperature conditions and maintain a long service life.

Coating Uniformity: The small diameter and softness of the tungsten skeins help improve the uniformity of the evaporated material. By carefully adjusting the shape and position of the tungsten skein during the vacuum coating process, more uniform deposition can be achieved.

1. High melting point: Tungsten has the highest melting point of all metals, around 3422 degrees Celsius. This high melting point enables tungsten twisted wire to withstand extremely high temperatures without significant deformation or degradation. It is particularly suitable for applications that require heating in a vacuum or high-temperature environment.

2. Excellent strength and durability: Tungsten twisted wire exhibits exceptional tensile strength, making it highly resistant to breakage or deformation. It can withstand the stresses and strains associated with coiling, winding, and handling processes, ensuring reliable performance over time.

3. Conductive properties: Tungsten twisted wire is an excellent conductive material with the characteristics of low resistance and high conductivity. In some coating processes, materials need to be evaporated by arc discharge or electron beam heating. Tungsten twisted wire can be used as an electrode material to provide stable conductive properties in a vacuum environment.

Due to its special physical and chemical properties, tungsten twisted wire has excellent performance in high temperature, vacuum and corrosive environments, so it plays an important role in various fields.

Tungsten twisted wire is widely used in various fields. Here are some common application areas:

1. Lighting industry: Tungsten twisted wire is widely used as the filament of traditional incandescent light bulbs and halogen light bulbs. Its high melting point and good heat resistance allow tungsten to emit light stably at high temperatures, providing long-lasting lighting effects.

2. Electronic packaging: Tungsten twisted wire can be used for gold wire welding in electronic device packaging. Its high melting point and excellent electrical conductivity allow tungsten to withstand high-temperature welding processes and provide reliable electrical connections.

3. Vacuum coating: Tungsten twisted wire is used as a heating element for evaporation sources in vacuum coating. By heating the tungsten strand, the evaporation material can be heated to a high enough temperature that it evaporates and is deposited onto the target object to form a thin film.

4. Vacuum melting: Tungsten twisted wire is used as a heating element in vacuum melting, such as an electrode in vacuum arc melting. Its high-temperature resistance and stable conductivity enable tungsten twisted wire to withstand use under high temperatures and strong acid and alkali conditions.

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When choosing the right tungsten twisted wire for a vacuum coating project, several factors should be considered.

1. Purity: High-purity tungsten wire ensures better performance in vacuum environments. Look for wires with a high level of purity, typically 99.95% or higher.

2. Diameter: The diameter of the tungsten twisted wire depends on your specific coating requirements. Consider the desired deposition rate, coating thickness, and the characteristics of your coating material. Thicker wires generally allow for higher current and deposition rates.

3. Tensile strength: Tungsten twisted wire should have good tensile strength to withstand the tension during winding and coiling processes. Higher tensile strength wires are more durable and less likely to break.

4. Twist pitch and direction: The pitch and direction of the twists in the wire can affect its performance and handling. Consider the specific requirements of your vacuum coating equipment and ensure that the wire twist aligns with the system's specifications.

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