HIGH-TEMPERATURE MATERIAL AT LOW MAGNITUDE OF TEMPERATURE LINEAR EXPANSION COEFFICIENT AND METHOD OF PRODUCTION OF SUCH MATERIAL Russian patent published in 2005 - IPC

FIELD: materials at low temperature linear expansion coefficients for operation under considerable thermal loading.

SUBSTANCE: proposed material is used as refractory articles, parts for internal combustion engines, catalyst carriers in exhaust gas after-burning units, filters of diesel engines and precision units characterized by constant volume within wide range of temperatures. Proposed high-temperature material is given in solid solution at formula Mg_xAl_2(1-x)Ti_(1+x)O₅ where 0.1<x<0.6. Method of production of such materials includes mixing the components, briquetting and obtaining the material in form of solid solution at formula Mg_xAl_2(1-x)Ti_(1+x)O₅ where 0.1<x<0.6 by solid-phase synthesis during 2 h at 1600±20°C at temperature rise rate of 10°C/min from aluminum titanate Al₂TiO₅ and magnesium dititanate MgTi₂O₅ taken at mass ratio of (42-91) :(58-9), respectively. Proposed method makes it possible to obtain high-temperature material at temperature linear expansion coefficient within (-4.7-2.5)* 10^-7 1/° within temperature range of 20-800°C.

EFFECT: enhanced mechanical strength.

3 cl, 2 tbl, 4 ex