Glass formula for producing direct current glass insulator

Abstract

The present invention discloses glass for producing a direct current glass insulator. The formulation is characterized in that the glass comprises the following compositions in percentage by weight: 65 to 72 percent of SiO2, 1.5 to 3.5 percent of Al2O3, 0.05 to 0.4 percent of Fe2O3, 5 to 8 percent of CaO, 2 to 4 percent of MgO, 5 to 9 percent of K2O, 0.1 to 3 percent of BaO and 6 to 9 percent of Na2O; and simultaneously, the glass also comprises 0.1 to 1 percent of Li2O and 0.1 to 2 percent of SrO. The formulation can effectively reduce the transfer of sodions, improve volume resistivity of the glass, reduce dielectric loss and improve electrical performance of the glass insulator.

Description

technical field [0001] The invention relates to a glass formulation, in particular to a glass used for producing DC glass insulators. Background technique [0002] Soda-lime glass currently on the market has a mass percentage of: SiO 2 65%~72%;Al 2 o 3 1.5%~3.5%; Fe 2 o 3 0.05%~0.4%; CaO 5%~8%; MgO 2%~4%; K 2 O 1%~3%; Na 2 O 10% ~ 15%; BaO 0% ~ 3%, with low melting temperature and high thermal expansion coefficient, excellent melting process performance and toughening performance, and can be used in the manufacture of AC glass suspension insulators. However, under the condition of DC transmission, the sodium ions in the soda-lime glass migrate in one direction and gather locally under the long-term action of the DC electric field, causing irreversible "aging" of the glass, especially due to the effect of the leakage current, the heating of the insulator aggravates the migration of sodium ions , accelerated the aging of glass. Therefore, DC glass insulators should a...

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Problems solved by technology

However, under the condition of DC transmission, the sodium ions in the soda-lime glass migrate in one direction and gather locally under the long-term action of the DC electric field, causing irreversible "aging" of the glass, especially due to the effect of the leakage conduction current, the heating of the insulator aggravates the migration of sodium ions , accelerates the aging of glass

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