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Viscosity of molten potassium nitrate
Maria J C Lança, Maria J V Lourenço, Fernando J V Santos, Valentim M B Nunes, Carlos A Nieto de Castro

Potassium nitrate (KNO3) has been suggested as a standard material for the viscosity of molten salts, under moderate to high temperatures. A recently developed oscillating-cup viscometer has been tested up to 760 K, by measuring the viscosity of molten KNO3 at atmospheric pressure. A detailed analysis of the uncertainty of the measurements, and the comparison with the data reported by other authors, demonstrated that the data obtained has an estimated uncertainty of 2.3%.

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