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METHOD FOR PRODUCING STEATITE CERAMICS OF C 221 TYPE WITH IMPROVED ELECTRICAL PROPERTIES
The object of the invention is a process for producing non-alkaline steatite ceramics having controlled electrical properties for electrotechnology. Non-alkaline steatite ceramics of the invention belongs to a group of magnesium silicates of C C221 type. Steatite ceramics is an electrical insulator with low electrical conductivity at increased temperature, low dielectric constant and small dielectric losses. To produce steatite ceramics the materials talc, kaolin, clays, barium carbonate and calcium oxide and magnesium oxide in the form of hydroxides, carbonates, nitrates or other salts were used. The mixture can contain up to 3 % by weight of iron oxides. After the mixture is ground and the products are formed, the blanks are fired at a temperature in the range from 1280 to 1350 °C for 1 hour to 10 hours. The steatite ceramics without an addition of calcium oxide and magnesium oxide has specific electrical resistance at 400 °C 0.6 x 107 Ohm m. In case when calcium and magnesium oxides are added, the specific electric resistance of the ceramics is 1.4 x 107 Ohm m at 400 °C.
METHOD FOR PRODUCING STEATITE CERAMICS OF C 221 TYPE WITH IMPROVED ELECTRICAL PROPERTIES
The object of the invention is a process for producing non-alkaline steatite ceramics having controlled electrical properties for electrotechnology. Non-alkaline steatite ceramics of the invention belongs to a group of magnesium silicates of C C221 type. Steatite ceramics is an electrical insulator with low electrical conductivity at increased temperature, low dielectric constant and small dielectric losses. To produce steatite ceramics the materials talc, kaolin, clays, barium carbonate and calcium oxide and magnesium oxide in the form of hydroxides, carbonates, nitrates or other salts were used. The mixture can contain up to 3 % by weight of iron oxides. After the mixture is ground and the products are formed, the blanks are fired at a temperature in the range from 1280 to 1350 °C for 1 hour to 10 hours. The steatite ceramics without an addition of calcium oxide and magnesium oxide has specific electrical resistance at 400 °C 0.6 x 107 Ohm m. In case when calcium and magnesium oxides are added, the specific electric resistance of the ceramics is 1.4 x 107 Ohm m at 400 °C.
METHOD FOR PRODUCING STEATITE CERAMICS OF C 221 TYPE WITH IMPROVED ELECTRICAL PROPERTIES
HERSTELLUNGSVERFAHREN VON C 221 TYP STEATITKERAMIK MIT VERBESSERTEN ELEKTRISCHEN EIGENSCHAFTEN
PROCESSUS DE PRÉPARATION DES CÉRAMIQUES EN STÉATITE DU TYPE C 221 AVEC DES MEILLEURES PROPRIÉTÉS ÉLECTRIQUES
RAMSAK IRENA (author) / RAZPOTNIK MARIJA (author) / HOLC JANEZ (author) / KUSCER HROVATIN DANJELA (author)
2018-10-10
Patent
Electronic Resource
English
IPC:
C04B
Kalk
,
LIME
METHOD FOR PRODUCING NON-ALKALINE STEATITE CERAMICS WITH IMPROVED ELECTRICAL PROPERTIES
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