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The article considers the results of the study of the uneven distribution of the strength properties of a rigid high-temperature fibrous heat-protective material over the volume of the block. The article presents a comparative study of the uneven strength of two materials that differ in the method of introducing the binder. A conclusion is proposed about the mechanism of the occurrence of unevenness of the strength properties of a rigid fibrous thermal insulation material when a soluble binder is introduced into the material by the strait method. The absence of such a mechanism is shown for materials obtained using a solid-phase binder introduced into the molding hydraulic mass.

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The composition and morphology of a ceramic material based on magnesium oxide and their influence on its thermophysical and physico-mechanical properties are studied. It is established that when using different initial precursors, the matrix component has the same morphological features and is a cubic magnesium oxide. The dependences of physical and mechanical properties on the type of material and the method of molding were studied on experimental samples. Ill. 3. Ref. 23.