Typical Properties of Clear Fused Silica
- Density: 2.203 g/cm3
- Hardness: 5.3–6.5 (Mohs scale), 8.8 GPa
- Tensile strength: 48.3 MPa
- Compressive strength: >1.1 GPa
- Bulk modulus: ~37 GPa
- Rigidity modulus: 31 GPa
- Young's modulus: 71.7 GPa
- Poisson's ratio: 0.17
- Lame elastic constants: λ=15.87 GPa, μ=31.26 GPa
- Coefficient of thermal expansion: 5.5×10−7/°C (average from 20 °C to 320 °C)
- Thermal conductivity: 1.3 W/(m·K)
- Specific heat capacity: 45.3 J/(mol·K)
- Softening point: c. 1665 °C
- Annealing point: c. 1140 °C
- Strain point: 1070 °C
- Electrical resistivity: >1018 Ω·m
- Dielectric constant: 3.75 at 20 °C 1 MHz
- Dielectric loss factor: less than 0.0004 at 20 °C 1 MHz
- Index of refraction: at 587.6 nm (nd): 1.4585
- Change of refractive index with temperature (0 to 700 °C): 1.28×10−5/°C (between 20 and 30 °C)
- Strain-optic coefficients: p11=0.113, p12=0.252.
- Hamaker constant: A=6.5×10-20 J.
- Dielectric strength: 250–400 kV/cm at 20 °C
Read more about this topic: Fused Quartz
Famous quotes containing the words typical, properties, clear and/or fused:
“A building is akin to dogma; it is insolent, like dogma. Whether or no it is permanent, it claims permanence, like a dogma. People ask why we have no typical architecture of the modern world, like impressionism in painting. Surely it is obviously because we have not enough dogmas; we cannot bear to see anything in the sky that is solid and enduring, anything in the sky that does not change like the clouds of the sky.”
—Gilbert Keith Chesterton (1874–1936)
“A drop of water has the properties of the sea, but cannot exhibit a storm. There is beauty of a concert, as well as of a flute; strength of a host, as well as of a hero.”
—Ralph Waldo Emerson (1803–1882)
“If people would forget about utopia! When rationalism destroyed heaven and decided to set it up here on earth, that most terrible of all goals entered human ambition. It was clear there’d be no end to what people would be made to suffer for it.”
—Nadine Gordimer (b. 1923)
“Perhaps his might be one of the natures where a wise estimate of consequences is fused in the fires of that passionate belief which determines the consequences it believes in.”
—George Eliot [Mary Ann (or Marian)