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PROCESS FOR MANUFACTURING CORDIERITE CERAMICS HAVING CONTROLLED AND REPRODUCIBLE MECHANICAL AND THERMAL PROPERTIES
The object of the invention is a process for manufacturing cordierite ceramics having controlled and reproducible properties for electrotechnology, metallurgy and heating technology. Cordierite ceramics of the invention belongs to a group of alkaline earth aluminosilicates. To manufacture cordierite ceramics we used the natural materials talc, clay components, feldspar, silicon oxide and as an aluminium oxide source the synthetic compounds corundum, boehmite, aluminium hydroxide or a mixture thereof. After the mixture is ground and the products are formed, the blanks are fired at a temperature in the range from 1270 to 1350 °C for 1 hour to 10 hours. If an aluminium oxide source with a size particle exceeding 2 micrometres is added, cordierite ceramics having mechanical flexural strength of 111 to 115 MPa and thermal expansion coefficient from 3,0 to 3.2 x 10 -6 K -1 in the range from 30 to 600 °C is obtained. If an aluminium oxide source with a size particle below 2 micrometres is added, cordierite ceramics having mechanical flexural strength of 70 to 90 MPa and thermal expansion coefficient from 2.3 to 2.8 x 10-6 K -1 in the range from 30 to 600 °C is obtained.
PROCESS FOR MANUFACTURING CORDIERITE CERAMICS HAVING CONTROLLED AND REPRODUCIBLE MECHANICAL AND THERMAL PROPERTIES
The object of the invention is a process for manufacturing cordierite ceramics having controlled and reproducible properties for electrotechnology, metallurgy and heating technology. Cordierite ceramics of the invention belongs to a group of alkaline earth aluminosilicates. To manufacture cordierite ceramics we used the natural materials talc, clay components, feldspar, silicon oxide and as an aluminium oxide source the synthetic compounds corundum, boehmite, aluminium hydroxide or a mixture thereof. After the mixture is ground and the products are formed, the blanks are fired at a temperature in the range from 1270 to 1350 °C for 1 hour to 10 hours. If an aluminium oxide source with a size particle exceeding 2 micrometres is added, cordierite ceramics having mechanical flexural strength of 111 to 115 MPa and thermal expansion coefficient from 3,0 to 3.2 x 10 -6 K -1 in the range from 30 to 600 °C is obtained. If an aluminium oxide source with a size particle below 2 micrometres is added, cordierite ceramics having mechanical flexural strength of 70 to 90 MPa and thermal expansion coefficient from 2.3 to 2.8 x 10-6 K -1 in the range from 30 to 600 °C is obtained.
PROCESS FOR MANUFACTURING CORDIERITE CERAMICS HAVING CONTROLLED AND REPRODUCIBLE MECHANICAL AND THERMAL PROPERTIES
VERFAHREN ZUR HERSTELLUNG VON CORDIERITKERAMIKEN MIT KONTROLLBAREN UND REPRODUZIERBAREN MECHANISCHEN UND THERMISCHEN EIGENSCHAFTEN
PROCÉDÉ DE FABRICATION DE CÉRAMIQUES EN CORDIÉRITE AVEC PROPRIÉTÉS THERMIQUES ET MÉCANIQUES REPRODUCTIBLES ET CONTRÔLABLES
BANTAN INES (author) / KUSCER HROVATIN DANJELA (author) / HOLC JANEZ (author)
2017-01-11
Patent
Electronic Resource
English
IPC:
C04B
Kalk
,
LIME
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