Aluminosilicate Glass Material Guide
We fabricate aluminosilicate cover glass from Corning Gorilla®, AGC Dragontrail™, Panda and other high-alumina substrates, from 0.33 mm for touch devices up to 10 mm for industrial parts. Each panel is CNC shaped, chemically strengthened, then coated and printed for displays, rugged HMIs, medical interfaces and automotive screens.
Capabilities
Glass family
High-alumina silicate · Gorilla®, Dragontrail™, Panda, AS 87 eco
Thickness
0.33–2.0 mm for touch devices · Up to 10 mm for industrial parts
Strengthening
Chemical (ion exchange) · Thermal, by requirement
Surface treatments
AR, AG coating · AF coating
Silkscreen printing
Multi-layer · Multiple surfaces
Fabrication
CNC cutting, drilling, cutouts · Edge grinding and polishing
Gallery
Get an aluminosilicate glass quote
Send your drawing with thickness, edge, printing and coating needs, and we will recommend the substrate and process route.
What Aluminosilicate Glass Is
Aluminosilicate glass is a silicate glass with a high share of aluminum oxide, typically 5–15% Al₂O₃; cover glass with 13% or more is classed as high-alumina. Silica forms the glass network, sodium and potassium oxides make ion exchange possible, and magnesium and calcium oxides tune viscosity and chemical stability.
The alumina is what makes it the standard cover glass for touch devices. It opens the glass structure so that, in a hot salt bath, larger potassium ions can replace smaller sodium ions much deeper into the surface than in soda lime glass. The result is a compressed surface layer that is both higher in stress and several times deeper, which is what stops scratches and edge chips from turning into cracks. That is why we specify aluminosilicate when a cover is thin, handheld, touched constantly or exposed to impact, and stay with soda lime when a framed, low-risk panel does not need that margin.
Aluminosilicate vs. Soda Lime After Strengthening
After chemical strengthening, aluminosilicate glass carries a much deeper and higher-stress compressed layer than soda lime glass, which shows up in hardness and impact resistance.
| Property | Aluminosilicate, chemically strengthened | Soda lime, standard |
|---|---|---|
| Vickers hardness | 600–700 HV | 450–550 HV |
| Surface compressive stress (CS) | Above 750 MPa, typical | Low |
| Depth of layer (DOL) | 40–60 µm and above | Typically 8–12 µm |
| Impact resistance | 3–5× higher | Baseline |
| Light transmission with AR, AG or AF coating | Above 91% | — |
| Relative cost | Higher | Lower |
Values reflect typical processed panels; each substrate grade has its own data sheet.
Choosing an Aluminosilicate Substrate
Most aluminosilicate cover glass comes from a few named substrates. The choice usually depends on thickness, required strength, availability and cost rather than on large performance gaps.
Corning Gorilla® Glass
The most widely specified brand, with the strongest brand recognition. Chosen when an end customer or specification names it.
AGC Dragontrail™
AGC’s float-produced cover glass in Dragontrail™, Pro and X grades, processed from 0.28 to 2.0 mm.
Panda Glass
Tunghsu’s high-alumina cover glass in Panda-1681 and Panda-MN228 grades, from 0.3 to 8.0 mm, usually the lower-cost option.
SCHOTT AS 87 eco
A thin aluminosilicate built for ion exchange, strongest in the 100–350 µm range, with transmission from UVB to IR for low-profile displays, touch sensors and NIR/SWIR sensors.
Domestic high-alumina glass
High-alumina sheet from Chinese producers such as CSG and IRICO, positioned for price-sensitive projects.
Aluminosilicate Glass FAQ
What thickness is aluminosilicate cover glass?
Most consumer and touch devices use 0.33–2.0 mm. Industrial, outdoor and aerospace parts go thicker, up to 6 mm or 10 mm depending on the substrate.
Can aluminosilicate glass be used at high temperature?
It has a higher softening point than soda lime glass, which suits automotive interiors, lab equipment and industrial sensors. Panda grades, for example, soften at 780–850 °C, against 715–729 °C for soda lime float. For continuous heat or thermal shock, borosilicate 3.3 is still the better choice.
Can it be thermally tempered instead of chemically strengthened?
Both routes are possible, but chemical strengthening is the usual one for aluminosilicate, because it works on thin glass, keeps the surface flat, and produces the deep compressed layer the alumina is there for.