The presented work is devoted to the study of deformation and destruction of porous ceramics based on diatomite. The dependences of the elastic modulus of the material on porosity were obtained by scanning electron microscopy, mechanical compression tests of samples and acoustic emission method: with a change in the porosity of the medium in the range of 20-60%, the value of the elastic modulus varied in the range from 240 to 50 MPa. It was also found that the tensile strength of the material σs changes by ~10 MPa with a change in porosity.

This work is devoted to the study of the mechanical properties of porous ceramics based on diatomite. Based on the morphological analysis of the studied samples, the porous structure of ceramics (morphology and average pore diameter) was analyzed and the numerical value of the porosity of the samples (35...50%) was determined. The values of the static (70...115 GPa) and dynamic elastic modulus of the samples (37...50 GPa) were measured experimentally. The dependence of the dynamic modulus of porous diatomite ceramics on porosity is studied: the elastic modulus decreases with increasing porosity of the material. A decrease in the porosity of the material after deformation was also found. The formation of diatomite filaments after deformation of samples by compression at a rate of no more than 8 * 10-4 s-1 was detected.