Refractory materials are used in several industries involving very aggressive environments, thus the number of chemical, thermal and physical properties required for a refractory material are high and diverse. In Refractory Characteristics, Properties and Uses, the authors suggest that the determination of the mineralogical phase’s amounts is an essential parameter for the design of new refractories matrix to have command over the desired properties and quality of the final product. The subsequent chapter may serve as a guide to the composition- and microstructure-based interpretation of experimental findings in refractory materials. Based on the concepts and refractory materials data provided in this book, taking into account the general issues concerning strength measurements, the reader should be able to realistically assess even such complex quantities as thermal shock resistance parameters. Next, a systematic joint study of the temperature dependences of the isobaric