Pure Gold
Scientific Information
| : Au |
| : 79 |
| : 196.96657 |
| : 1064°C |
| : 19.30 |
| : transition metal |
Gold is metallic, with a yellow color when in a mass, but when finely divided it may be black, ruby, or purple. Gold is found in trace amounts in all igneous rocks. Its abundance in the Earth's crust is estimated to be approximately 0.005 parts per million. Except for tellurium, selenium, and bismuth, it occurs mostly in its native state, remaining chemically uncombined.
Gold is soft and is the most malleable and ductile element; one ounce of gold can be drawn into 80 kilometers of five microns, or five millionths of a meter, thick gold wire. It is a good conductor of heat and electricity and is unaffected by air and most reagents. In addition, gold is highly reflective of heat and light.
Alfa Chemistry provides high-quality precious metals at a competitive price. Gold products we can supply are in the shapes of foil, pellet, mesh, powder, rod, disc, and wire, etc. We can also customize various shapes of Gold products according to your requirements or drawings.
Pure Gold Products
| Shape | Catalog | Purity | Size |
|---|---|---|---|
| Foil | ACAM-PRE-P001 | 99.9% | Thickness: 0.001mm – 0.02mm Length: 0.025m - 10m |
| Foil | ACAM-PRE-P002 | 99.95% | Thickness: 0.0125mm– 1mm Size Light Tight: 10mm x 10mm - 100mm x 100mm |
| Foil | ACAM-PRE-P003 | 99.99% | Thickness: 0.025mm Size Light Tight: 25mm x 25mm - 100mm x 100mm |
| Foil | ACAM-PRE-P004 | 99.999% | Thickness: 0.25mm, 0.5mm, 1mm, 1.5mm, 2mm Size Light Tight: 10mm x 10mm - 100mm x 100mm |
| Pellet | ACAM-PRE-P005 | 99.99% | Nominally: 4.7mm diameter x 4.7mm length Maximum Lump Size: 6mm |
| Pellet | ACAM-PRE-P006 | 99.999% | Nominally: 3mm diameter x 3mm length Maximum Lump Size: 4mm |
| Mesh | ACAM-PRE-P007 | 99.9% | Wire Diameter: 0.005mm, 0.011mm, 0.06mm Nominal Aperture: 0.011mm, 0.04mm, 0.25mm Wires/Inch: 1500, 500, 82 Open Area: 44%, 60%, 65% Size: 10mm x 10mm - 210mm x 210mm |
| Powder | ACAM-PRE-P008 | 99.95% | Maximum Particle Size: 45µm, 250μm, 0.015mm |
| Rod | ACAM-PRE-P009 | 99.95% | Diameter: 1.6mm, 2mm, 3mm, 4mm, 5mm, 6mm, 10mm Length: 25mm - 1000mm |
| Rod | ACAM-PRE-P010 | 99.999% | Diameter: 5mm Length: 4mm |
| Target Disc | ACAM-PRE-P011 | 99.95% | Thickness: 0.1mm, 0.2mm, 0.5mm, 1mm, 2mm, 3mm Diameter: 10mm – 76.2mm |
| Disc | ACAM-PRE-P012 | 99.999% | Orientation: (100, 110, 111) Thickness: 0.5mm - 2mm Diameter: 5mm - 10mm Orientation Accuracy: =< 0.4° Surface Finish: =< 0.03µm Ra |
| Polyester Insulated Wire | ACAM-PRE-P013 | 99.99% | Conductor Diameter: 0.025mm, 0.05mm Insulation: Polyester Insulation Thickness: 0.005mm, 0.007mm Length: 0.5m - 100m |
| PTEF Insulated Wire | ACAM-PRE-P014 | 99.99% | Conductor Diameter: 0.05mm, 0.075 Insulation: PTEF Insulation Thickness: 0.009mm, 0.012mm Length: 0.5m - 100m |
| Polyimide Insulated Wire | ACAM-PRE-P015 | 99.99% | Conductor Diameter: 0.1mm Insulation: Polyimide Insulation Thickness: 0.013mm Length: 0.1m - 2m |
| Borosilicate Glass Gold Microwire | ACAM-PRE-P016 | 99.99% | Conductor Diameter: 0.001mm – 0.009mm Insulation: Borosilicate Glass Insulation Thickness: 0.0095mm – 0.005mm Length: 1m - 5m |
| Tube | ACAM-PRE-P017 | 99.95% | Outside Diameter: 0.15mm - 10mm Wall Thickness: 0.05mm – 0.15mm Length: 10 mm – 1000mm |
| Wire | ACAM-PRE-P018 | 99.99% | Diameter: 0.0015mm – 1mm Length: 1m - 100m |
| Wire | ACAM-PRE-P019 | 99.999% | Diameter: 0.75mm, 1mm Length: 0.025m – 6.5m |
Applications
In addition to chief applications in coinage, ornaments and jewelry, gold can be used in the following applications:
- Textile industry.
- Gold flake is used as a radiation-control coating for spacecraft.
- In electronic tubes, such as gold-plated grid wire, to give high conductivity and suppress secondary emissions.
- Gold powder and gold sheet is used for soldering semiconductors, with gold having a good ability to wet silicon at 371 ℃.
- Gold is used as a plating material, where sodium gold cyanide is used as a gold plating solution. The plating has good chemical resistance and electrical properties, however the plating lacks wear resistance, in which case gold-indium plate is utilized.