- Materials
- Forms
- Reference Materials
-
Services
-
Services
-
-
Sectors
-
Supporting cutting edge research and development with advanced materials to your needs.
High performance materials for extreme conditions.
Innovative and lightweight materials with high mechanical properties and durability.
Materials used in chemical engineering from consumables to innovative solutions.
Advanced materials characterized by high electrical or insulation performance.
High quality materials for renewable energy.
Biocompatible and biodegradable materials to the highest standards.
High purity, biocompatible materials for high performance devices and applications.
High purity metals and alloys in various forms and crucibles suitable to your needs.
State of the art materials for the next generation of technologies.
High performance materials for extreme conditions.
Durable materials for corrosive environments.
Foils, disks or windows across a range of materials to facilitate your innovation.
Polymers, metal foils, and sustainable materials for your packaging needs.
Your requirements for unique products and attributes will be met across our 170,000+ product range and customization capabilities.
High-quality materials across branded products in various forms including rods, wires, and foils support space technology needs.
Highest quality materials to support your need for small-quantity specialist materials such as graphite and lithium compounds.
High purity materials to improve the reproducibility and reliability of your evaporation processes.
-
- Product Ranges
-
Resources
-
Find out our latest news.
Read our latest insights, and opinions.
Discover our Innovation Discovered podcasts on innovation, products, interesting topics, and more.
Find out how we've worked with our partners
Our latest updates on what we are doing, find out more.
Find out more about us and the great roles we have available for talented individuals. Find out more.
Take a look at our global distributors.
Explore our FAQ resource to help answer your key questions.
Gain a clearer picture of the language used in scientific study
-
- About Us
Palladium Disk
Available Configurations
Properties common to all products in this list
| Purity | Thickness | Diameter | Temper ⓘ |
|---|---|---|---|
| 99.95% (3N5) and 99.99% (4N) | 0.004 mm (foil) to 2 mm (sheet) | 4 mm to 50.8 mm | As Rolled |
Need custom configurations? Please contact us.
Key Features
Palladium Disc at 99.75–99.99% purity is a precision-cut circular component offering palladium's unique hydrogen permeability, catalytic surface properties, and noble metal chemical inertness in a defined geometry suited to membrane cells, electrochemical assemblies, and analytical instrumentation:
Selective Hydrogen Permeability — The Standard Membrane Element for Laboratory Diffusion Cells
Palladium's selective permeability to hydrogen — blocking all other gases while allowing hydrogen to diffuse through the bulk — makes Palladium Disc the standard membrane element for laboratory hydrogen diffusion cells, isotope measurement apparatus, and permeation test rigs where the disc itself acts as the selective barrier between the hydrogen source and measurement chamber.
Catalytic Surface Properties for Test Coupons & Electrochemical Work
Palladium's well-documented catalytic activity and stable noble metal surface chemistry make Palladium Disc a reproducible platform for catalytic test coupon studies and electrochemical reference electrode work — where the disc's surface provides a well-characterized, chemically inert precious metal interface for systematic investigation of catalytic and electrochemical behavior.
As-Rolled Condition with Face-Centered Cubic Structure for Reliable Surface Finishing
Supplied in the as-rolled condition, Palladium Disc benefits from palladium's face-centered cubic structure to support reliable, consistent surface finishing — giving the disc the surface quality required for catalytic, electrochemical, and thin-film deposition work where surface roughness and contamination directly affect experimental results.
Purity Range 2N75 to 4N for Grade-Matched Application Selection
Purity options from 2N75 (99.75%) to 4N (99.99%) support grade selection from industrial catalytic and membrane applications through to high-purity research use — with 4N grade selected for surface science, electrochemical impedance studies, and hydrogen absorption investigations where trace impurity levels at the disc surface are experimental variables.
Precision Circular Geometry for Direct Integration into Membrane & Analytical Assemblies
The precision-cut circular geometry makes Palladium Disc a direct-fit membrane element for standard laboratory diffusion cell formats and a ready-to-use substrate for analytical instrumentation — simplifying integration into hydrogen permeation rigs, electrochemical cells, and thin-film deposition systems without additional shaping or preparation.
Industrial Applications
Palladium Disc is used across hydrogen membrane research, electrochemistry, surface science, catalysis, and thin-film deposition wherever a precision circular palladium component with defined purity and surface quality is required:
- ✦ Hydrogen Diffusion Membrane Discs in Laboratory Permeation Cells
- The standard membrane element in laboratory hydrogen diffusion cells and permeation test rigs, where palladium's selective permeability to hydrogen — and to hydrogen alone — makes Palladium Disc the only metallic disc material capable of acting as a gas-selective solid-state membrane in standard laboratory apparatus for hydrogen flux measurement, isotope separation studies, and membrane performance evaluation.
- ✦ Electrochemical Reference Electrode Substrates
- Used as electrochemical reference electrode substrates where palladium's noble metal chemical inertness, well-characterized surface electrochemistry, and consistent surface finishing from its face-centered cubic structure provide a reproducible precious metal electrode geometry for impedance spectroscopy, voltammetry, and electrochemical characterization in aqueous and non-aqueous electrolyte systems.
- ✦ Catalytic Test Coupons
- Applied as catalytic test coupons in heterogeneous catalysis research, where the precision circular geometry provides a standardized surface area for systematic evaluation of palladium's catalytic activity in hydrogenation, oxidation, and coupling reactions — and where purity grade selection allows contamination sensitivity to be matched to the requirements of the specific catalytic system under investigation.
- ✦ Thin-Film Deposition Targets & Substrates
- Used as thin-film deposition targets and substrate discs in palladium thin-film research, where the precision geometry, consistent surface condition, and purity-traceable composition provide a reproducible platform for depositing and characterizing palladium-based catalytic, hydrogen-sensing, and functional thin-film coatings.
- ✦ Surface Science, Hydrogen Absorption & Electrochemical Impedance Research
- Used in research for surface science investigations, hydrogen absorption studies, and electrochemical impedance characterization where a chemically inert, well-characterized precious metal disc in a defined geometry — at the 4N purity grade where trace surface impurities are experimental variables — provides the reproducible noble metal substrate required for systematic and comparable experimental programs.
Material Properties
| Element | Value |
|---|---|
| Atomic number | 46 |
| Crystal structure | Face centred cubic |
| Electronic structure | Kr 4d¹⁰ |
| Valences shown | 2, 3, 4 |
| Atomic weight( amu ) | 106.42 |
| Thermal neutron absorption cross-section( Barns ) | 6 |
| Photo-electric work function( eV ) | 5 |
| Natural isotope distribution( Mass No./% ) | 108/ 26.7 |
| Natural isotope distribution( Mass No./% ) | 110/ 11.8 |
| Natural isotope distribution( Mass No./% ) | 104/ 11.0 |
| Natural isotope distribution( Mass No./% ) | 102/ 1.0 |
| Natural isotope distribution( Mass No./% ) | 105/ 22.2 |
| Natural isotope distribution( Mass No./% ) | 106/ 27.3 |
| Atomic radius - Goldschmidt( nm ) | 0.137 |
| Ionisation potential( No./eV ) | 1/ 8.3 |
| Ionisation potential( No./eV ) | 2/ 19.4 |
| Ionisation potential( No./eV ) | 3/ 32.9 |
| Element | Value |
|---|---|
| Material condition | Soft |
| Material condition | Hard |
| Poisson's ratio | 0.39 |
| Poisson's ratio | 0.39 |
| Bulk modulus( GPa ) | 187 |
| Bulk modulus( GPa ) | 187 |
| Tensile modulus( GPa ) | 121 |
| Tensile modulus( GPa ) | 121 |
| Hardness - Vickers( kgf mm⁻² ) | 40 |
| Hardness - Vickers( kgf mm⁻² ) | 100 |
| Tensile strength( MPa ) | 140-195 |
| Tensile strength( MPa ) | 325 |
| Yield strength( MPa ) | 205 |
| Yield strength( MPa ) | 34.5 |
| Element | Value |
|---|---|
| Electrical resistivity( µOhmcm ) | 10.8@20 |
| Temperature coefficient( K⁻¹ ) | 0.0042@0-100 |
| Thermal emf against Pt (cold 0C - hot 100C)( mV ) | -0.57 |
| Element | Value |
|---|---|
| Boiling point( C ) | 3140 |
| Density( gcm⁻³ ) | 12@20°C |
| Element | Value |
|---|---|
| Melting point( C ) | 1554 |
| Latent heat of evaporation( J g⁻¹ ) | 3398 |
| Latent heat of fusion( J g⁻¹ ) | 157 |
| Specific heat( J K⁻¹ kg⁻¹ ) | 244@25 |
| Thermal conductivity( W m⁻¹ K⁻¹ ) | 71.8@0-100°C |
| Coefficient of thermal expansion( x10⁻⁶ K⁻¹ ) | 11@0-100 |
Tolerances
| Thickness | <0.01mm | ±25% |
|---|---|---|
| Thickness | 0.01mm - 0.05mm | ±15% |
| Thickness | >0.05mm | ±10% |
| Diameter | ±0.5mm |