Germanium dioxide is well-known as a glass-forming material; it has the ability to form tetrahedral units (similar to those formed by silicon dioxide). Since the cation-to-anion ratio of GeO2 is in the right range, many GeO2 based compositions form glasses on melting and cooling.
The different forms of GeO2 (vitreous, hexagonal, tetragonal) lead to different corresponding infra-red spectra, but all are optically transparent over a wide spectral range between 280 nm and 5000 nm.
In addition, GeO2 based glasses have a higher coefficient of thermal expansion than silica- or boron-based glasses, and thus provide for a much better performance when vacuum seals (to brass or copper) are required.
Pure germanium is used for lenses and windows in IR systems that operate at even higher wavelengths (from 2 to 12 microns).
Gallium and gallium oxide can be used to increase the refractive index of glass and are used in the manufacture of lenses and optical mirrors. Optical mirrors made from gallium have high reflectivity and are stable at high temperatures.
Optical Lens Technical Documents
No whitepapers to display
No presentations to display
No application notes to display
Product Data Sheets
No product data sheets to display
Safety Data Sheets
No safety data sheets to display
Indium Corporation Blog Posts
In today’s Indium Mailbag, we discuss: “How can I get a quote for an indium sulfamate plating bath? I saw your bath kits but I only need the bath solution.”
In this installment of Tech Seconds, Phil describes how to diagnose defects caused by head-in-pillow (HIP).
Indium Mailbag is a series of blog posts where we discuss common indium-related questions. Today we answer the question: “What is the process for reclaiming indium and how much can it get for it?”
From One Engineer to Another®
All of Indium Corporation’s products and solutions are designed to be commercially available
unless specifically stated otherwise.