HIGH-TEMPERATURE MATERIAL AT LOW MAGNITUDE OF TEMPERATURE LINEAR EXPANSION COEFFICIENT AND METHOD OF PRODUCTION OF SUCH MATERIAL

• Main Authors: SUVOROV S.A, FISHCHEV V.N, ALEKSEEVA N.V
• Format: Patent
• Language: English; Russian
• Published: 10.11.2005
• Edition: 7
• Subjects: ARTIFICIAL STONE; CEMENTS; CERAMICS; CHEMISTRY; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS; CONCRETE; LIME, MAGNESIA; METALLURGY; REFRACTORIES; SLAG; TREATMENT OF NATURAL STONE

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 MgxAl2(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 MgxAl2(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