GLASS PREFERABLY FOR MANUFACTURING ELECTRIC HEATING ELEMENTS Russian patent published in 1997 - IPC

FIELD: electrical engineering, more particularly as magnetic and electroconducting elements. SUBSTANCE: glass for manufacturing electric heating elements comprises (mole %): 49.0-57.0 silicon oxide; 18.0-24.0 ferric oxide; 20.0-31.0, lithium oxide; 0.01- 2.0 boron oxide; 0.5-7.0 aluminium oxide; 0.02-5.0 sodium oxide; 0.01-2.0 copper oxide. Properties of glass; specific volume conductance is 10-30 ohm.cm; sharp edge initial melting temperature is higher than 1000 C; welding temperature is 1300-1350 C. EFFECT: improved properties. 3 tbl