VITREOUS COMPOSITION

摘要

The invention concerns a vitreous composition which is suitable for use as a sealing material for mineral-insulated electrical leads. The invention further concerns a sealing material which consists of the vitreous composition. The invention is characterized in that the vitreous composition comprises the following components: between 20 and 35 parts by weight of SiO2, between 10 and 25 parts by weight of B2O3, between 0 and 35 parts by weight of BaO, between 0 and 12 parts by weight of TiO2, between 20 and 40 parts by weight of PbO, between 0 and 10 parts by weight of CaO, and fewer than 0.1 parts by weight of alkali metal oxides.