Abstract
A new furnace design, based on the air-flow principle, is described. The furnace can operate to 400°C with a stability of ± 0.25°C for long time periods, gives access to about 91% of reciprocal space, and mounts on a standard goniometer head. The power consumption at 200°C is 26 W, at 400°C is 40 W. Higher temperatures are attainable. The optimum air flow is 2.5 l min−1. A proportional temperature-regulator circuit with self-contained power supply for the furnace is presented. The lattice-constant temperature dependence of K2Cd2(SO4)3 has been determined with the microfurnace, in the interval 14–207°C, through the phase transition from orthorhombic to cubic.
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