ISO 7884-4:1987
ISO 7884-4:1987

ISO 7884-4:1987

November 1987
International standard Current

Glass — Viscosity and viscometric fixed points — Part 4: Determination of viscosity by beam bending

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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Main informations

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International ISO standards

Publication date

November 1987

Number of pages

12 p.

Reference

ISO 7884-4:1987

ICS Codes

81.040.01   Glass in general

Print number

1
Sumary
Glass — Viscosity and viscometric fixed points — Part 4: Determination of viscosity by beam bending

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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