What is a characteristic of true Azeotropic refrigerants?

True azeotropic refrigerants have a unique characteristic in that they do not undergo fractionation. Fractionation occurs when a mixture of substances separates into its components due to differences in their boiling points. However, azeotropic mixtures behave as a single substance, maintaining consistent properties during phase changes. This means that the composition of the refrigerant remains constant throughout the condensation and evaporation processes, allowing for predictable performance in refrigeration systems.

In contrast, mixtures that are not azeotropic would display varying compositions as they change states, leading to challenges in maintaining efficiency and performance over time. Thus, the defining feature of true azeotropic refrigerants is their stability and consistency, distinguishing them from non-azeotropic mixtures.