What is 96% silica a glass used for?
What is 96% silica glass used for? Explanation: Ninety-six-percent silica glasses are similar to fused silica, but are easier to fabricate and have a higher coefficient of expansion. These can be used as heat shields in space vehicles and other chemical glassware.
What is the density of silica glass?
2.20 g/cm3
5.2b Ambient-Pressure Density. Silica glass has a low density of 2.20 g/cm3 (molar volume: 27.3 cm3).
What is thermal conductivity of silica?
A final remark on the temperature dependence: the TC shows an increase of about 10% over the range 0-200° C. The Table shows a survey of published values for both bulk values and thin layers….The Thermal Conductivity of Silicon Dioxide.
| Thermal Conductivity of Silicon Dioxide | TC W/mK |
|---|---|
| Sand (wet)* | 1.7 |
| Glass | 1.4 |
| Fused Quartz | 1.4-2 |
| Quartz a-axis | 0.7 |
What is the refractive index of silica glass?
Its refractive index varies from 1.55 to 1.40 (for its transparent range: 160nm to 3000nm). Because fused silica is optically stable and consistent, many use it as a reference or standard for spectroscopic measurements. The details of its refractive index temperature dependence are also well studied.
What kind of silica is in glass?
glass is amorphous SiO2, or silica glass. (Quartz, which is present in sand, is a crystalline form of SiO2.) In amorphous SiO2 each silicon atom is bonded to four oxygen atoms, and each oxygen atom is bonded to two silicon atoms.
Is silica glass safe?
Borosilicate glass is a type of glass whose main components are silica and boron trioxide. It is known for being durable and very heat resistant. In fact, borosilicate glass is perfectly safe to use in both kitchen and laboratory applications.
How strong is silica glass?
Mechanical properties The theoretical tensile strength of silica glass is greater than 1 million psi. Unfortunately, the strength observed in practice is always far below this value.
Is silica a glass?
What is unbreakable glass called?
Laminated Glass (aka “Shatterproof Glass”) When this type of laminated security glass does break, it holds glass shards in place to prevent the glass from shattering dangerously inwards.
What are the properties of a fused silica glass?
Fused silica is a noncrystalline (glass) form of silicon dioxide (quartz, sand). Typical of glasses, it lacks long range order in its atomic structure. It’s highly cross linked three dimensional structure gives rise to it’s high use temperature and low thermal expansion coefficient. . Key Fused Silica Properties .
How is the elastic modulus of glass related to temperature?
Elastic Modulus of A Range of Glass Compositions as a Function of Temperature. • Elastic modulus is the stiffness of the glass, an important engineering property. • Generally, the stiffness decreases with temperature.
What are the elastic properties of glass and ceramic?
Elastic Constants for Glasses and Glass Ceramics Code Type E GPa G GPa 9606 Glass Ceramic 17.2 6.9 1723 Aluminosilicate 12.5 5.1 9608 Glass Ceramic 12.5 5.0 7940 Fused Silica 10.4 4.5 0080 Soda Lime Silicate 10.2 4.2 7900 96% Silica 10 4.2 7740 Borosilicate, Low Expansion 9.1 3.8 7070 Borosilicate, Low Loss 7.4 3 • E = Young’s Modulus
What is the atomic structure of fused silica?
Fused silica is a noncrystalline (glass) form of silicon dioxide (quartz, sand). Typical of glasses, it lacks long range order in its atomic structure.