Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Chemical constituents of basalt and E-glass fibers.
| Chemical Components | Composition (wt%) | |
|---|---|---|
| Basalt | E-Glass | |
| SiO2 (silica) | 57.5 | 55 |
| Al2O3 (alumina) | 16.9 | 15 |
| Fe2O3 (ferric oxide) | 9.5 | 0.3 |
| MgO | 3.7 | 3 |
| Na2O | 2.5 | 0.8 |
| TiO2 | 1.1 | - |
| K2O | 0.8 | 0.2 |
| B2O3 | - | 7 |
| F | - | 0.3 |
