METHOD OF CONNECTING CERAMIC UNITS FROM SILICON NITRIDE Russian patent published in 2009 - IPC C04B37/00 C04B35/584 

FIELD: chemistry.

SUBSTANCE: invention relates to methods of connecting separate units from silicon nitride, which are used in manufacturing of constructional products, for instance nozzle apparatuses, long thermosteam covers and pipes (chlorine inputs), operating in aluminium melt at temperature 1200°C, glass-melting apparatuses for glass fibre stretching at temperature to 1600°C. Said technical result is achieved by the following: method includes preparing of glue mixture based on silicon nitride, which contains, wt %: 0.5-1.0 - melted magnesium oxide, 0.5-3.0 milted aluminuim oxide, 35-41 aluminiumboronphosphate binding agent and separately - similar mixture with alumochromephosphate binding agent, application on connected surfaces of units first mixture with aluminumboronphosphate binding agent, then mixture with alumochromephosphate binding agent with further coupling of said surfaces. Burning of connected product is carried out at temperature 1000°C with staying for 2 hours.

EFFECT: expansion of assortment of connected units from silicon nitride with wide range of porosity (from 0 to 23%) and increase of adhesion strength of glue seam.

3 cl, 1 tbl