High voltage porcelain insulators

H - Electricity – 01 – B

Patent

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H01B 3/08 (2006.01) C03C 8/02 (2006.01) C04B 41/50 (2006.01) C04B 41/86 (2006.01) H01B 3/12 (2006.01) H01B 17/08 (2006.01) H01B 17/60 (2006.01)

Patent

CA 1283180

HIGH VOLTAGE PORCELAIN INSULATORS Abstract of the Disclosure A high voltage porcelain insulator is disclosed, which has a glaze applied to at least a head portion of the insulator which head portion is covered by a metal fitting and a cement. The glaze essentially consists of, in terms of weight, from 64.0 to 68.0% of SiO2, from 17.5 to 19.0% of Al2O3, from 5.0 to 6.5% of MgO, and more than 3.0% of CaO, from 2.0 to 2.8% of K2O and Na2O in a total amount, and from 3.0 to 9.0%, when calculated as MnO, a compound which is converted to MnO and or MnO2 after being fired at a temperature range suitable for firing porcelain.

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