International Standard
ISO 7884-4:1987
Glass — Viscosity and viscometric fixed points — Part 4: Determination of viscosity by beam bending
Reference number
ISO 7884-4:1987
ISO 7884-4:1987
Edición 1
1987-12
1987-12
© ISO 2024
International Standard
p
ISO 7884-4:1987
14828
No disponible en español
Publicado
(Edición 1, 1987)
Esta norma se revisó y confirmó por última vez en 2020.
Por lo tanto, esta versión es la actual.
Resumen
A method of determining the dynamic viscosity of glass on a rod-shaped test specimen, i.e. a beam, supported at its end is specified. The viscous deflection rate of the beam is measured under given load at the midpoint between the supports. In addition the viscosity-temperature relationship and the dependence of the viscosity on the thermal history of the sample can be determined. The theoretical basis relations and the apparatus including method of measurements are described.
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