🔷 High Purity Indium Foil for Vacuum Sealing, Thermal Interface, Soldering & Research

Indium Foil is a soft, low-melting, silvery-white metal foil supplied for vacuum sealing, thermal interface materials, low-temperature soldering, electronics, laboratory research, cryogenic sealing, and specialty industrial applications. Because indium has excellent ductility, strong surface conformity, good thermal contact behavior, and a melting point of approximately 156.6°C, it is widely used in applications where a clean, compressible, and high-purity metal foil is required.

Shaanxi Nickel Titanium Copper Metal Co., Ltd. supplies Indium Foil in different purity grades, including 99.9%, 99.99%, 99.995%, and 99.999%, depending on customer requirements. The product can be supplied as thin foil sheets, rolls, cut pieces, custom strips, or special-size foil according to thickness, width, length, purity, and packaging needs.

Compared with hard metal sheets such as titanium foil, nickel foil, copper foil, molybdenum foil, or tungsten foil, Indium Foil has a very different performance profile. It is not selected for high mechanical strength or structural load-bearing use. Instead, it is valued for softness, low melting temperature, sealing behavior, thermal contact, and clean metallic performance in sensitive industrial and laboratory environments.

🧪 Product Overview

Item	Description
Product Name	Indium Foil
Material	Metallic Indium
Chemical Symbol	In
Purity	99.9%, 99.99%, 99.995%, 99.999%
Appearance	Silvery-white soft metal foil
Thickness	Customizable
Form	Foil sheet, roll, strip, cut piece, custom shape
Melting Point	Approx. 156.6°C
Density	Approx. 7.31 g/cm³
Supply Condition	Soft, clean metallic foil
Packaging	Flat packing, roll packing, sealed bag, protective carton
Documentation	COA, specification sheet, commercial invoice, packing list

Our Indium Foil is designed for customers who require a soft, deformable, and high-purity indium material in thin flat form. Compared with indium ingots, granules, or wire, foil is easier to place between contact surfaces, cut into sealing pieces, form into thermal interface layers, and apply in precision assemblies.

For vacuum equipment, cryogenic systems, electronic components, and laboratory experiments, Indium Foil provides a convenient material form that can be cut, pressed, folded, or shaped according to actual application requirements.

✨ Key Features of Indium Foil

✅ Soft and Compressible Metal Foil

One of the most important features of Indium Foil is its exceptional softness. Indium is much softer than most common industrial metals, which allows the foil to deform under pressure and conform to uneven contact surfaces. This property is especially valuable in sealing and thermal interface applications.

Because of this softness, Soft Indium Foil may show slight marks, wrinkles, pressure lines, or minor surface deformation during handling, packaging, or transportation. These marks are normal physical characteristics of indium and do not usually affect the material’s purity or functional performance.

For customers who require a very flat surface, special protective films, or selected appearance quality, please confirm this requirement before ordering. We can discuss packaging and handling options according to the final use.

✅ Low Melting Point for Controlled Processing

Indium has a low melting point of approximately 156.6°C. This makes Indium Foil suitable for low-temperature bonding, soldering, sealing, alloying, and thermal interface processes where excessive heating should be avoided.

In many applications, customers choose Pure Indium Foil because it can provide soft metallic contact without requiring high processing temperatures. This is useful for delicate components, electronic assemblies, optical systems, and experimental devices that may be sensitive to heat.

The foil form also allows users to apply material directly to a surface or between two parts. This makes Indium Foil more convenient than bulk material when thin, uniform contact layers are needed.

✅ High Purity Grades Available

We supply High Purity Indium Foil according to different purity requirements. General applications may use 99.9% indium, while vacuum, electronic, laboratory, and research applications often require 99.99% or higher purity.

Purity Grade	Typical Application
99.9% Indium Foil	General sealing, alloying, experimental use
99.99% Indium Foil	Vacuum sealing, electronics, soldering, laboratory research
99.995% Indium Foil	Advanced material preparation and high-purity systems
99.999% Indium Foil	Semiconductor-related research and strict impurity control

For strict applications, trace impurity control is important. Common impurity elements may include Sn, Pb, Zn, Fe, Cu, Cd, Tl, and other trace metals depending on purity grade and refining route. If customers have special impurity limits, please provide the required specification before quotation.

✅ Custom Thickness and Size

Different applications require different foil thicknesses and dimensions. Thin Indium Foil may be selected for thermal interface layers, precision contact, small laboratory samples, or electronic use. Thicker foil may be used for vacuum sealing, gasket preparation, cryogenic sealing, or special bonding applications.

We can supply Custom Indium Foil according to requested thickness, width, length, cut shape, packaging method, and quantity.

Custom Item	Available Options
Thickness	Customizable according to application
Width	Narrow strip, standard width, custom width
Length	Cut piece, sheet, roll, or custom length
Shape	Square, rectangle, strip, disc, custom shape
Purity	99.9% to 99.999%
Package	Flat packing, roll packing, sealed bag, carton
Documentation	COA, product photos, specification sheet

Because indium is soft, very thin foil should be handled carefully. Folding, stretching, pulling, or heavy pressure may cause deformation. For precision applications, suitable packaging should be confirmed before shipment.

📊 Typical Physical Properties of Indium

Property	Typical Value
Atomic Number	49
Atomic Weight	114.82
Density	Approx. 7.31 g/cm³
Melting Point	Approx. 156.6°C
Boiling Point	Approx. 2072°C
Appearance	Silvery-white metal
Hardness	Very soft
Ductility	Excellent
Electrical Conductivity	Good
Thermal Conductivity	Good
Crystal Structure	Tetragonal

These physical properties explain why Indium Foil is used in applications where softness, low-temperature melting, surface conformity, and clean metal contact are required. Unlike structural foils, Indium Metal Foil is mainly selected for functional performance rather than mechanical strength.

🏭 Main Applications of Indium Foil

🧲 Indium Foil for Vacuum Sealing

Indium Foil is widely used as a sealing material in vacuum systems because it can deform under pressure and fill microscopic surface irregularities. When properly compressed between two surfaces, indium can help form a soft metallic seal in selected vacuum environments.

In vacuum sealing applications, the final sealing performance depends on surface finish, flange structure, pressure, temperature, foil thickness, and installation method. Indium Foil for Vacuum Sealing is often selected where soft metal conformity is more important than high mechanical strength.

Customers may use indium foil as a gasket material, sealing layer, or raw material for custom indium sealing parts. For best results, the foil thickness and surface condition should be selected according to the actual sealing structure.

❄️ Cryogenic Sealing and Low-Temperature Systems

Because indium remains soft and ductile under many low-temperature conditions, Indium Foil is also used in cryogenic sealing and low-temperature research systems. Its ability to conform to surfaces makes it useful where conventional sealing materials may not perform well.

In cryogenic systems, sealing reliability depends on thermal contraction, surface finish, compression force, and compatibility with the equipment design. Pure Indium Foil can be cut into suitable shapes and used as a soft metallic sealing layer in selected low-temperature assemblies.

For cryogenic applications, customers should confirm thickness, size, purity, and operating environment before ordering.

🌡️ Thermal Interface Materials

The softness and ductility of Indium Foil make it useful as a thermal interface material. When placed between two surfaces and compressed, the foil can help improve contact by filling small gaps and surface unevenness.

Compared with paste-type thermal interface materials, Soft Indium Foil offers a clean metallic form that can be cut and positioned more easily in certain assemblies. It may be used in electronics, power devices, optical systems, laboratory instruments, and high-performance thermal contact structures.

For thermal interface use, customers should evaluate working temperature, pressure, contact area, surface flatness, material compatibility, and required thermal performance. The foil thickness should be selected carefully because too thick or too thin material may affect contact behavior.

🔩 Low-Temperature Soldering and Bonding

With its low melting point and good wetting behavior, Indium Foil is suitable for selected low-temperature soldering and bonding applications. It can be used where conventional high-temperature joining methods are not suitable.

For bonding applications, the foil form allows customers to place indium directly between two surfaces before heating or pressing. This is useful for experimental bonding, electronic assemblies, optical components, sensors, and other precision systems.

However, soldering performance depends on surface preparation, substrate material, atmosphere, heating method, pressure, and joint design. Customers should confirm whether they need Pure Indium Foil or an indium-based alloy foil before ordering.

📱 Electronics and Precision Components

High purity Indium Foil can be used in electronics-related material systems, precision bonding, experimental circuits, thermal contact layers, sealing components, and specialty metal assemblies. Its combination of softness, electrical conductivity, thermal conductivity, and low melting point makes it useful for selected electronic and precision applications.

For electronics customers, purity and cleanliness are important. High Purity Indium Foil in 99.99% or higher grades may be preferred when contamination control is required. Clean packaging and careful handling are also recommended.

Because electronics applications can be highly specific, customers should provide details such as thickness, size, purity, surface requirement, package type, and application temperature before ordering.

🧪 Laboratory Research and Material Development

Indium Foil is widely used by universities, research institutes, laboratories, and R&D teams. It can be cut into small samples, placed between surfaces, melted at low temperature, or used as a high-purity metallic test material.

Researchers may use Indium Foil for thermal interface studies, sealing experiments, low-temperature bonding tests, alloy development, thin metal sample preparation, and material behavior analysis. The foil form is convenient for repeatable experiments because it can be cut into controlled shapes and weights.

For research customers, we can support small sample quantities, high-purity grades, and documentation such as COA, product photos, and specification sheets.

⚙️ Alloying and Low-Melting Metal Systems

Indium can be alloyed with tin, bismuth, gallium, and other low-melting metals. Indium Foil can serve as a convenient raw material when a flat, easily cut indium form is preferred.

Compared with ingots, foil is easier to divide into smaller pieces. This helps improve weighing and batching accuracy in laboratory-scale alloy preparation. Customers can cut the required quantity and melt it with other metals according to their formula.

The final alloy composition should be selected according to melting range, mechanical behavior, bonding performance, electrical characteristics, and application environment.

🧰 Available Supply Forms

We understand that different customers use Indium Foil in different ways. Some customers need thin small sheets for laboratory use, while others need larger pieces, rolls, or custom cut shapes for production testing.

Supply Form	Description
Thin Foil Sheet	Suitable for thermal interface, research, and sealing
Foil Roll	Suitable for repeated use and larger quantity orders
Cut Piece	Supplied according to customer size requirement
Foil Strip	Useful for narrow sealing or bonding applications
Disc Shape	Suitable for circular sealing or sample preparation
Custom Shape	Produced according to drawing or application request

Because indium is extremely soft, handling should be gentle. Sharp folding, stretching, rough cutting, or heavy compression may cause marks or deformation. For precision applications, customers should confirm packaging and surface expectations before shipment.

🧾 Chemical Composition and Quality Control

For high-purity metal foil, chemical composition and surface cleanliness are key quality factors. We can supply Indium Foil according to different purity grades and provide supporting documents when required.

Grade	Indium Content	Typical Requirement
Industrial Grade	≥99.9%	General use, alloying, sealing tests
High Purity Grade	≥99.99%	Vacuum sealing, soldering, electronics, research
Ultra High Purity Grade	≥99.995%	Advanced material preparation
Special High Purity Grade	≥99.999%	Strict impurity control and high-end research

Quality control may include material verification, thickness checking, appearance inspection, size confirmation, weight checking, packaging inspection, and batch record management. For export orders, we can also support commercial invoice, packing list, product specification sheet, and other required documents.

📦 Packaging and Storage Recommendations

Indium Foil should be packed carefully because it is very soft and easy to deform. Standard packaging can include flat protective packing, plastic film separation, sealed plastic bags, aluminum foil bags, foam protection, hard cartons, or customized export packaging.

For thin foil, we recommend flat packaging or protected roll packaging depending on the product size. For high-purity applications, independent sealed packaging can help reduce contamination before use.

Recommended storage practices include:

Storage Item	Recommendation
Environment	Clean, dry, room-temperature storage
Contact	Avoid direct hand contact for high-purity use
Pressure	Avoid heavy objects on the foil
Folding	Avoid unnecessary sharp bending
Moisture	Keep sealed when not in use
Contamination	Avoid oil, dust, and mixed metal particles
Labeling	Keep batch number, purity, and size information

Proper storage is especially important when Indium Foil is used for vacuum systems, electronics, high-purity soldering, or laboratory research.

🚢 Export and Documentation Support

Shaanxi Nickel Titanium Copper Metal Co., Ltd. supports international customers with practical export documents and shipment preparation. Clear product information helps customers complete import clearance, receiving inspection, and internal quality control.

Common documents may include:

Document	Purpose
Commercial Invoice	Customs clearance and payment record
Packing List	Package quantity, net weight, gross weight
Certificate of Analysis	Purity and impurity information
Product Specification Sheet	Thickness, size, purity, and basic properties
Product Photos	Pre-shipment confirmation
SDS / MSDS if required	Safety and handling reference

For international orders, customers are encouraged to confirm destination country, order quantity, shipping method, and document requirements before shipment.

🔍 Indium Foil vs. Indium Sheet vs. Indium Gasket

Customers may sometimes use the terms Indium Foil, indium sheet, and indium gasket interchangeably, but they are not exactly the same.

Term	Meaning
Indium Foil	Thin indium material supplied in foil form
Indium Sheet	Usually thicker flat indium material
Pure Indium Foil	High indium content foil without intentional alloying
High Purity Indium Foil	Indium foil supplied in 99.99% or higher purity
Indium Metal Foil	General description emphasizing metallic indium form
Indium Gasket	Indium foil or sheet processed into a sealing part

On this product page, Indium Foil refers mainly to high-purity metallic indium foil supplied as sheet, strip, roll, or custom cut piece. If customers need a finished gasket, please provide drawing, thickness, outer diameter, inner diameter, tolerance, and application details.

💡 Selection Guide for Indium Foil

Choosing the right Indium Foil specification depends on the final application. The table below can help customers prepare inquiry details more clearly.

Application	Suggested Purity	Suggested Form
Vacuum sealing	99.99% or higher	Soft foil sheet or custom gasket blank
Cryogenic sealing	99.99% or higher	Clean foil, custom thickness
Thermal interface material	99.99% or higher	Thin foil sheet or cut piece
Low-temperature soldering	99.9%–99.99%	Foil strip or cut piece
Laboratory research	99.99% or higher	Small sheet or sample pack
Electronics development	99.99% / 99.995%	High-purity sealed package
Alloy preparation	According to formula	Foil pieces, granules, or wire

This guide is for general reference only. The final specification should be confirmed according to actual equipment, working temperature, purity requirement, contact pressure, surface condition, and process design.

🌍 Why Choose Shaanxi Nickel Titanium Copper Metal Co., Ltd.

Shaanxi Nickel Titanium Copper Metal Co., Ltd. supplies high-purity metals and customized industrial materials for global customers. Our products include metal granules, plates, rods, wires, foils, tubes, anodes, alloy materials, and custom processed metal components.

For Indium Foil, we focus on purity selection, flexible thickness, custom size, careful packaging, export support, and responsive communication. Whether the customer needs a small sample for testing or a larger quantity for production, we can provide suitable supply options according to actual requirements.

Our advantages include:

Advantage	Description
Flexible Purity	99.9% to 99.999% available
Custom Thickness	Foil thickness can be discussed according to use
Multiple Forms	Sheet, roll, strip, cut piece, or custom shape
Export Support	Documents and international shipment available
Technical Communication	Product data and specification discussion
Small and Bulk Orders	Suitable for R&D and production needs

We understand that customers buying high-purity indium products often need clear specifications, reliable packaging, and quick confirmation before purchase. Our team can help review requirements and provide quotation based on purity, thickness, size, quantity, and destination.

📌 Important Notes Before Ordering

Before ordering Indium Foil, customers should confirm several important details. This helps us provide an accurate quotation and avoid misunderstanding.

Please provide:

Required Information	Example
Required Purity	99.9%, 99.99%, 99.995%, 99.999%
Foil Thickness	0.05mm, 0.1mm, 0.2mm, or custom
Size	Width, length, sheet size, roll size
Form	Sheet, roll, strip, disc, custom cut piece
Quantity	100g, 500g, 1kg, or bulk
Application	Vacuum sealing, thermal interface, soldering, research
Documentation	COA, SDS, photos, specification sheet
Destination Country	For shipping and export documents

Because indium is a valuable metal, price may change with raw material market conditions, purity grade, thickness, size, and quantity. Please contact us for the latest quotation before placing an order.

📞 Contact Us for Custom Indium Foil

If you are looking for Indium Foil with stable purity, custom thickness, soft metallic behavior, and export-ready packaging, please contact Shaanxi Nickel Titanium Copper Metal Co., Ltd. with your required specifications and quantity. We can provide quotation, product photos, packing details, and available documentation according to your request.

📧 Email: sales@niticu.com
📞 Phone / WhatsApp / WeChat: +86 13335373172
🔗 WhatsApp: https://wa.me/8613335373172
🏭 Factory: Baotai Road Industrial Park, High-tech Zone, Baoji City, Shaanxi, China
🌐 Website: https://niticu.com

📩 Contact us now for pricing, samples, and technical support — we respond within 24 hours.

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Indium Foil – Custom Foil for Sealing and Thermal Interfaces

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