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  • BSI
    BS 7034-2:1988, ISO 7884-2:1987 Viscosity and viscometric fixed points of glass - Method for the determination of viscosity by rotation viscometers
    Edition: 1989
    $305.31
    / user per year

Description of BS 7034-2:1988 1989

This part of ISO 7884 specifies a method of determining, by means of rotation viscometers, the dynamic viscosity of glass and, in particular, the viscosity-temperature relationship at any temperature or viscosity within the range of measurement. This covers the ranges of viscosity for melting, refining and working of glass.

This method allows for continuous measurements and for measurements under various shearing stresses (i.e. for the determination of flow curves) in order to check whether or not the glass behaves as a Newtonian liquid.

Dependent on the particular viscosity-temperature relationship of the glass tested, the viscosity range covered by this method extends approximately from 10 to 108 dPa s2) in the temperature range from about 1 600 to 600 °C, the torque necessary ranging from 0,1 to 20 N mm according to the construction of the apparatus. The method is applicable if the rotational frequency does not exceed 8 s-1; however, at rotational frequencies above 1 s-1 it should be ascertained that inertia forces are negligible.



Standard NumberBS 7034-2:1988, ISO 7884-2:1987
TitleViscosity and viscometric fixed points of glass - Method for the determination of viscosity by rotation viscometers
StatusUnder Review
Publication Date1989-01-31
Identical National Standard OfISO 7884-2:1987
DescriptorsTest equipment, Formulae (mathematics), Calibration, Glass, Dynamic viscosity, Specimen preparation, Error correction, Precision, Viscometers, Working range, Temperature, Viscosity measurement, Rate-of-flow viscometers, Melting, Viscosity, Time, Testing conditions
ICS81.040.01 Glass in general
CommitteeLBI/1/2
ISBN0 580 16901 4
PublisherBSI
Pages18



About BSI

BSI Group, also known as the British Standards Institution is the national standards body of the United Kingdom. BSI produces technical standards on a wide range of products and services and also supplies certification and standards-related services to businesses.
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