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Determination of Silicon Density to High Precision Using a Submersible, Servo-Controlled Balance

Richard S Davis

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Novel use has been made of a high-precision, servo-controlled balance for the hydrostatic weighing of solid objects. The balance is completely immersed in a fluorocarbon fluid. Extensive experience has been gained by using the apparatus in the assignment of density to 70 silicon objects which will be issued as a Standard Reference Material (SRM). The balance contributes about 1 × 10-6 to the relative uncertainty of the final results.


PACS

06.30.Dr Mass and density

47.85.Dh Hydrodynamics, hydraulics, hydrostatics

06.20.F- Units and standards

07.10.Lw Balance systems, tensile machines, etc.

Subjects

Fluid dynamics

Instrumentation and measurement

Dates

Issue 4 (October 1982)

Received 25 March 1982



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