Specifications Table

Product Name – Aluminum foil, 0.5mm (0.02in) thick, annealed, Puratronic™, 99.9995% (metals basis)
Quantity/Pack Size – 100x500mm, 100x100mm, 50x50mm
Form – Foil
Grade – Puratronic™, 99.9995% (metals basis)
Application – High-precision lab experiments, thermal insulation, corrosion-resistant barrier

Product Overview

This Puratronic™ 99.9995% aluminum foil is engineered for demanding laboratory applications where ultra-high purity and consistent performance are non-negotiable. The 0.5mm thickness provides optimal balance between flexibility and durability, while the annealed treatment ensures enhanced malleability for easy shaping and handling. With a metals basis purity of 99.9995%, this foil minimizes trace element contamination, making it ideal for sensitive analytical procedures, semiconductor research, and high-vacuum environments. The material’s inherent properties include exceptional thermal conductivity (237 W/m·K) and electrical conductivity (61% IACS), coupled with outstanding corrosion resistance due to its protective oxide layer. The foil maintains dimensional stability across temperature ranges (-200°C to 600°C), preventing warping or degradation during thermal cycling. Its non-magnetic nature and excellent reflectivity (80-90% across visible spectrum) further expand its utility in optical and electromagnetic applications. The Puratronic™ certification guarantees stringent quality control, with each batch tested for elemental impurities using GDMS (Glow Discharge Mass Spectrometry) to ensure compliance with ultra-pure standards. The foil’s smooth, defect-free surface finish (Ra < 0.5 μm) prevents particle generation, critical for cleanroom and contamination-sensitive processes.

FAQs

1. What is the difference between annealed and non-annealed aluminum foil?

Annealing is a heat treatment process that softens the aluminum by relieving internal stresses, making the foil more ductile and easier to form without cracking. Non-annealed foil retains higher tensile strength but may be more prone to tearing when bent or shaped. This Puratronic™ foil is annealed to provide optimal workability for lab applications requiring precise manipulation.

2. Can this foil be used in high-vacuum environments?

The 99.9995% purity and low outgassing properties make this foil suitable for high-vacuum applications. Its minimal volatile content and stable oxide layer reduce the risk of contamination in vacuum chambers. However, thorough degassing via pre-baking at 150-200°C is recommended before use in ultra-high vacuum (UHV) systems to eliminate adsorbed moisture and gases.

3. How does the thickness of 0.5mm compare to standard household aluminum foil?

Standard household aluminum foil typically ranges from 0.016mm to 0.024mm in thickness, making this 0.5mm foil approximately 20-30 times thicker. The increased thickness provides superior mechanical strength, better heat distribution, and enhanced durability for repeated use in lab settings where thinner foils would fail or degrade.

4. What cleaning methods are recommended before use in sensitive applications?

For critical applications, clean the foil with high-purity acetone or isopropyl alcohol (99.9%+) followed by deionized water rinsing. Avoid abrasive cleaners or chlorine-based solvents, as they can compromise the surface integrity. For semiconductor or optical uses, a final rinse with ultra-pure water (18 MΩ·cm) and nitrogen drying is advised to prevent water spots or residue.

5. Is this foil compatible with acidic or alkaline solutions?

While aluminum naturally forms a protective oxide layer, prolonged exposure to strong acids (pH 9) can corrode the foil. It is resistant to weak organic acids, neutral salts, and most atmospheric conditions. For chemical compatibility testing, conduct a small-scale trial with your specific reagents, as trace impurities in the chemicals may accelerate corrosion.