Cite as:
Lança M, Lourenço M, Santos F, Nunes V, de Castro C N, 2001, "Viscosity of molten potassium nitrate" High Temperatures - High Pressures 33(4) 427 – 434

Viscosity of molten potassium nitrate

Maria Lança, Maria Lourenço, Fernando Santos, Valentim Nunes, Carlos Nieto de Castro

Received 09 February 2000

Abstract. 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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