The Physics
Factbook
An encyclopedia of scientific essays

Resistivity of Glass

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Bibliographic Entry Result
(w/surrounding text)		 Standardized
Result
Gamov, George. Matter, Sky and Earth. New Jersey: Prentice Hall, 1965.
Material Electrical Conductivity in Inverse Ohms (for 18 °C)
Glass 2 × 10−14
2 × 1014 Ωm
Fiberex E-CR Glass Advantage. Fiberex Glass.2004.
Properties Unit 'E'-Glass E-CR Glass
Volume Resistivity Ohm M 0.402 × 10 + 15 0.384 × 10 + 15
3.84 × 1014 Ωm
to
4.02 × 1014 Ωm
Hevelen Van Alan. Physics: A General Introduction. Little Brown Company. 1982. "For the glass filament [equation]where ρG = 9 × 1010 Ωm" 9 × 1010 Ωm
Material: Glass (SiO2), bulk. MEMS and Nanotechnology Clearinghouse.
Property Value Conditions
Electrical resistivity 1e+09… 3.98e+11 Ω*m Glass,at temp=250 C
Electrical resistivity 3.16e+06… 6.3e+08 Ω*m Glass,at temp=400 C
Electrical resistivity 630000 Ω*m Glass,at temp=500 C
Electrical resistivity 4600 Ω*m Glass,at temp=1000 C
Electrical resistivity 790 Ω*m Glass,at temp=1500 C
790 Ωm
to
3.98 × 1011 Ωm

Electrical resistivity is a measure, which indicates how strongly a material opposes the flow of electric current. Electric current is the flow of charges through a metal wire or through an electrical conductor.  In different materials the flow of electricity is different. The resistivity of metals will increase with temperature and the resistivity of semi conductors will decrease with temperature. Superconductivity is when materials loose all electrical resistivity at low temperatures. Glass has a resistivity of about 1014 Ωm.

Glass is usually produced when a molten material cools very fast, not allowing for enough time to pass for a regular crystal lattice to form. Common glass is mostly made up of  the same chemical compound as quartz. Glass is transparent to visible light. This is because there is no atomic line transition state with the energy of visible light in the components of glass. Some ingredients may be added to glass to change its properties. Leaded glass has an increased refractive index, which makes it appear to be more brilliant. Thermal and electrical properties of glass can be changed with boron. The color of glass can be changed with the addition of metals and metal oxides. Glass can be created naturally from volcanic flows which are in the form of obsidian. Soda of potash can be used to lower the melting point of glass.

Jane Golubovskaya -- 2004

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