Device for rheo-electric measurements having a low thermal impedance guard
AssigneeTA Instruments-Waters LLC
InventorsScott Merrullo, Nigel Doe
Life of this patent
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Abstract
The present disclosure describes an apparatus for performing electrical and rheology measurements of a material sample, comprising: an upper geometry; and a lower geometry. The lower geometry is stationary and the upper geometry rotates relative to the lower geometry. The lower geometry includes: a first electrode; a second electrode; and an electrical insulator for electrically isolating the first electrode from the second electrode. A thermally conductive metal plate is below the electrical insulator. A layer of low thermal impedance conductive material and a layer of electrically insulating material are between the electrical insulator and the thermally conductive metal plate.
Claims20
An apparatus for performing electrical and rheology measurements of a material sample, comprising:
- an upper geometry;
- and
- a lower geometry, wherein the lower geometry is stationary and the upper geometry rotates relative to the lower geometry, and wherein the lower geometry includes:
- a first electrode;
- a second electrode;
- and
- an electrical insulator for electrically isolating the first electrode from the second electrode, the apparatus further comprising:
- a sample gap between the upper geometry and the lower geometry, the material sample positioned at the sample gap;
- a thermally conductive metal plate below the electrical insulator;
- and
- a layer of low thermal impedance conductive material and a layer of electrically insulating material between the electrical insulator and the thermally conductive metal plate for mitigating a source of stray capacitance from the traveling from the first and second electrodes to the thermally conductive metal plate and providing a desirable thermal conductance between the thermally conductive metal plate and uppermost surface of the lower geometry.
An apparatus for performing electrical and rheology measurements of a material sample, comprising:
- a plate comprising:
- a first electrode;
- a second electrode;
- and
- an electrical insulator for electrically isolating the first electrode from the second electrode, the apparatus further comprising:
- a thermally conductive metal plate below the electrical insulator;
- and
- a plurality of fastening devices extending from the first and second electrodes to the thermally conductive metal plate, the fastening devices constructed and arranged to not interfere with electrical properties of the lower geometry.
A measurement system, comprising:
- a rheometer, comprising:
- an upper geometry;
- and
- a lower geometry, wherein the lower geometry is stationary and the upper geometry rotates relative to the lower geometry, and wherein the lower geometry includes:
- a first electrode;
- a second electrode;
- and
- an electrical insulator for electrically isolating the first electrode from the second electrode, the rheometer further comprising:
- a sample gap between the upper geometry and the lower geometry, the material sample positioned at the sample gap;
- a thermally conductive metal plate below the electrical insulator;
- and
- a layer of low thermal impedance conductive material and a layer of electrically insulating material between the electrical insulator and the thermally conductive metal plate, the system further comprising:
- a meter electrically coupled to the first electrode, the second electrode, and the thermally conductive plate for measuring an inductance, capacitance, and resistance of the sample in the gap.
Dependencies are inferred from the claim text.