Results are presented of an experimental study of the effect of temperature (up to 910-degrees-C) on the fluidization characteristics of three powders, chosen to span the fine-to-moderate size range. The major conclusions are that : the onset of bubbling, as measured by the minimum bubbling voidage, is progressively delayed with increasing temperature-in good agreement with theoretical predictions; and the quality of fluidization in the bubbling regime, quantified in terms of the standard deviation of bed pressure fluctuations, may be predicted for elevated-temperature systems from experiments conducted under ambient conditions.