Saxon Glass Technologies offers chemical strengthening of your glass products for enhanced strength, thermal shock resistance, and abrasion resistance, while preserving optical clarity and product shape.
Don’t have a glass selected? We can help you choose a glass composition that suits your application and that chemically strengthens for maximum performance.
Ionex® and Ion-Klad®
- Suitable for most type-I borosilicate glasses, typically used in pharmaceutical, cosmetic container applications. Also suitable for soda lime or alumino silicate cover glass for electronic display applications.
- Both treatments increase usable strength by 50% to 800% over untreated glass.
- Ion-Klad® provides a deeper compression case-depth for greater forgiveness to handling-generated surface flaws.
- In this version of Ionex®, the molten salt bath is treated with certain chemicals. The added specific ions attach themselves to or embed themselves in the immediate surface layers to reduce the stress relaxation rate during the chemical strengthening process. The result is the generation of 40 to 100 MPa surface compression (CS) in most cases. In the figure below, it is shown that glass samples strengthened in a “normal” bath (“EN-0”) generate 850 MPa CS. Immediately after the bath is treated (event marked by the vertical green lines), the CS rises to roughly 900-910 MPa and remains at high values so long as the bath is periodically treated. High-CS Ionex® technology may be particularly useful for strengthened cover glasses for personal mobile electronic devices.
- In this technique, advantage is taken of electric field assistance. Electrodes laden with KNO3 salt are deposited on the opposite faces of a thin glass sheet. The assembly is heated to an appropriate temperature. A DC field is applied to the opposite faces which drives K+ ions from the anode plate to the cathode plate. After a predetermined time, the field is reversed; K+ ions enter from the opposite face. Using a careful choice of time and current density, the specimen is treated through multicycles of switching the polarity. The multicycling yields a flatter and a balanced stress profile at the two surfaces. Again, by suitable choice of cycling, specimen warp which is commonly obtained in thin float glasses can be greatly controlled. Because the total time for the field-assisted ion exchange can be as little as a few minutes (generally ~1/2 hour), the CS values obtained in a typical soda lime silicate glass composition can be as high as 800-900 MPa (versus the traditional 500 MPa). Further, the incorporation of a short (~ ½ hour) molten bath immersion-based ion traditional exchange can strengthen the specimen edges to protect against edge originated failures in a dropped device. The evolution of CS and DOL with cycling is shown in the figure below for a soda lime silicate float glass. Frankenstein™ technology may be particularly useful for strengthened cover glasses for personal mobile electronic devices.
- A chemically strengthened glass for use in transparent armor laminates.
- Exhibiting a modulus of rupture of nearly 1 GPa (~144,000 psi), Ion-ArmorTM offers superior performance over typical soda-lime silicate glass.
- This is achieved by a surface compression greater than ~ 700 MPa (100,000 psi) and a case-depth exceeding 600 Microns (0.024 in) to as much as ~1 mm (0.040 in).
- Have a glass that is not a soda-lime silicate or borosilicate, such as aluminosilicate, or have a special application?
- We will develop a custom chemical strengthening process tailored specifically for your glass.