Microfurnace for Thermal Microscopy and Studies at High Temperatures

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Abstract
A small laboratory furnace is described for use in high‐temperature microscopy and for determining chemical compatibility, wetting, sintering, and temperatures of apparent melting up to 3000°C (5433°F). The furnace shell is a water‐cooled, 5‐in. copper tee and is of such construction as to afford a controlled atmosphere. Water‐cooled electrodes are designed to hold refractory metal strip heaters (either plain or with a wedge for better black body conditions) or special‐machined graphite heaters. Stepless power input is provided by variac‐controlled, saturable core reactor.

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