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A simple device for substantially improving metal-carbon eutectic fixed point performance by reducing temperature gradients

Pearce, J V (2007) A simple device for substantially improving metal-carbon eutectic fixed point performance by reducing temperature gradients. Metrologia, 44. L1-L3.

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Abstract

Metal-carbon eutectic fixed points are revolutionising high temperature metrology. However, the quality of the melting curve relies heavily on achieving good axial temperature uniformity along the fixed point crucible. This is not easy to achieve with conventional tube furnaces, and much work has been published in which temperature uniformity is clearly a problem. Here is presented a simple, inexpensive, and effective way of reducing temperature gradients along the fixed point crucible by at least a factor of two. This leads to a corresponding increase in melt duration and quality. A key feature of the device, essential to its operation, is the fact that it mechanically isolates the fixed point crucible from its surroundings.

Item Type: Article
Keywords: eutectic, modelling, finite element analysis, temperature gradients, fixed points
Subjects: Engineering Measurements
Engineering Measurements > Thermal
Last Modified: 02 Feb 2018 13:15
URI: http://eprintspublications.npl.co.uk/id/eprint/3804

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