METHOD OF DETERMINING HEAT RESISTANCE OF CONSTRUCTIONAL CERAMIC MATERIALS Russian patent published in 1999 - IPC

FIELD: manufacture of building materials. SUBSTANCE: prismatic samples with lateral indent simulating crack and containing no inflicted defects on their tops are manufactured. Heat resistance of samples is determined from values of following relationships: (1-K*1c

/K_1c) x 100% and σ₁/σ₂, where K*1c is critical coefficient of stress intensity after heat shock in a sample, K_1c average value of critical coefficient of stress intensity in samples before heat shock, σ₁ ultimate strength of a bent cut sample after heat shock, and σ₂ average value of ultimate strength of bent cut samples before heat shock. EFFECT: improved determination accuracy due to enabled quantitative evaluation of ceramic structure resistance to formation of heat cracks. 1 tbl