Low Melting Point Solder Granule Tin Bismuth Alloy Sn48Bi52
Tin bismuth alloy, also known as bismuth-tin or Bi-Sn alloy, is a
metallic alloy composed of tin (Sn) and bismuth (Bi). It is a
eutectic alloy, meaning it has a specific composition at which it
melts at a lower temperature than its individual components.
The composition of the alloy can vary, but common ratios include
58% bismuth and 42% tin (by weight) or 52% bismuth and 48% tin. The
eutectic composition of the Bi-Sn alloy is approximately 58%
bismuth and 42% tin.
One of the notable properties of tin bismuth alloy is its low
melting point. The eutectic alloy has a melting point of around 138
degrees Celsius (280 degrees Fahrenheit). This low melting point
makes it useful in applications where low-temperature soldering or
low-temperature casting is required.
Tin bismuth alloy has several applications:
Soldering: Due to its low melting point, Bi-Sn alloy is used as a
low-temperature solder in electronics assembly, particularly for
heat-sensitive components.
Safety devices: The alloy is used in fire safety devices, such as
fire sprinkler systems, where the alloy's low melting point allows
it to melt and release water or suppressants when exposed to high
temperatures.
Fusible plugs: Bi-Sn alloy is used in fusible plugs, which are
safety devices designed to melt and release pressure in pressurized
systems when the temperature exceeds a certain threshold.
Low-temperature casting: The alloy's low melting point makes it
suitable for various low-temperature casting applications, such as
jewelry-making, small-scale metal casting, and prototyping.
Thermal regulation: Tin bismuth alloy is used in thermal regulation
applications, including cooling devices and heat sinks, where the
alloy's low melting point enables it to absorb and dissipate heat
effectively.
It's worth noting that bismuth, one of the primary constituents of
this alloy, is considered non-toxic and has low environmental
impact, which makes tin bismuth alloy a more environmentally
friendly alternative to lead-based solders or alloys.
| Item name | Tin Bismuth Alloy Powder |
| MF | Sn-Bi |
| Purity(%) | 99.9% |
| Apperance | Gray black powder |
| Particle size | 200-300nm, 500-600nm |
| Packaging | Vacuum packing |
| Grade Standard | Industrial grade |
Tin-bismuth alloy, also known as bismuth-tin or Bi-Sn alloy, has
several applications due to its unique properties. Some of the
common applications of tin-bismuth alloy include:
Low-temperature soldering: Tin-bismuth alloy is used as a
low-temperature solder in electronics assembly. Its low melting
point allows for soldering of heat-sensitive components without
damaging them. It is particularly useful for soldering components
that cannot withstand the higher temperatures required by
traditional lead-based solders.
Thermal fuses: Tin-bismuth alloy is used in thermal fuses or
thermal cutoffs. These safety devices are designed to disconnect
the circuit when the temperature exceeds a certain threshold. The
low melting point of the alloy allows it to act as a fusible link,
breaking the circuit and protecting the equipment from overheating.
Fusible plugs: Fusible plugs are used in various applications to
release pressure when the temperature rises above a certain level.
Tin-bismuth alloy is employed in fusible plugs due to its low
melting point, enabling it to melt and relieve pressure in
pressurized systems, such as steam boilers or fire suppression
systems.
Low-temperature casting: The low melting point of tin-bismuth alloy
makes it suitable for low-temperature casting applications. It is
used in jewelry making, small-scale metal casting, and prototyping,
where intricate or delicate objects need to be cast without
subjecting them to high temperatures.
Thermal regulation: Tin-bismuth alloy is utilized in thermal
regulation applications, such as heat sinks and cooling devices.
Its low melting point allows it to absorb and dissipate heat
effectively, making it useful in heat management systems.
Biomedical applications: Bismuth is known for its low toxicity and
is often used in medical and pharmaceutical applications.
Tin-bismuth alloy can be used in biomedical devices, such as
implants or drug delivery systems, where its biocompatibility and
low melting point are advantageous.
Electrical contacts: The low melting point and good electrical
conductivity of tin-bismuth alloy make it suitable for electrical
contact applications. It can be used in switches, connectors, and
other electrical components where low-temperature operation is
desired.
