B) write the mechanical and physical properties of glass
Answers
Answer:
Properties of glasses like the density, viscosity, thermal expansion coefficient, chemical durability, electrical resistivity, and refractive index, as a function of bulk composition define the common structure models. The concepts of phase separation, bridging and non-bridging oxygen formation, network structures, and elemental effect on composition properties further explain the characteristic of a particular glass. Thermal history has a profound effect on density and viscosity of a vitreous glass. Therefore, it is essential to fully understand a glass composition and thermal history, to produce glasses of desirable mechanical, optical, and electrical properties for a particular application.
Answer:
MECHANICAL PROPERTIES
Density : 2500 kg/m3
A 4mm thick pane of glass weighs 10kg/m2
Hardness : 470 HK
The hardness of float glass is established according to Knoop. The basis is the test method given in DIN 52333 (ISO 9385).
Compression resistance : 800 - 1000 MPa
The compression strength defines the ability of a material to resist a load applied vertically to its surface
Modulus of elasticity : 70 000 MPa
The modulus of elasticity is either determined from the elastic elongation of a thin bar, or from bending a bar with a round or rectangular cross section.
Bending strength : 45 MPa
The bending strength of a material is a measure of its resistance during deflection. It is determined by bending tests on glass plate using the double ring method according to DIN EN 1288-5.
The main characteristics of glass are transparency, heat resistance, pressure and breakage resistance and chemical resistance.
plzzzzz follow me....