A kind of sealing glass powder for electric connector and its preparation method and sealing process

Abstract

The invention discloses sealing glass powder for electric connectors. According to the sealing glass powder, silicon dioxide serves as a skeleton structure and serves as a network forming body of glass, and an extremely small amount of alkali metal element is used, so that the melting temperature is lowered, the coefficient of expansion is increased, and the influence on high-temperature insulating properties of the glass is relatively low; alkaline-earth metal oxides such as MgO, CaO, SrO and BaO are added, and network gaps are filled with cations, i.e., Mg<2+>, Ca<2+>, Sr<2+> and Ba<2+> of MgO, CaO, SrO and BaO and a mixed base effect and a depressing effect are generated, so that the movement of alkali metal ions is hindered, and thus the insulating properties of the glass is improved; due to relatively high content of BaO, the material properties of the glass can be improved, and the high-temperature insulating properties of the glass is greatly improved; due to the addition of Al2O3, an AlPO4 unit can be formed in the glass, and a straight chain is changed into a network structure, so that the structure of the glass is stabilized, and the chemical stability is improved; in addition, by adding oxides such as ZnO, TiO2, ZrO2 and V2O5, the improvement on the chemical stability and electrical insulating performance of the glass is facilitated.

Description

technical field

[0001] The invention belongs to the field of sealing glass and its preparation, and in particular relates to a sealing glass powder for an electric connector, a preparation method and a sealing process thereof. Background technique

[0002] Electrical connectors are tools used in oil well operations to provide electrical connections and signal transmission between systems. In order to obtain the information in the oil well, a system is required, in which the connector can provide data access, such as the access between the data acquisition module and the data communication module. This type of connector is mainly composed of three parts of metal shell, metal stem and insulating sealing material sealed at high temperature. The product is required to withstand liquid pressure from 140MPa to 172MPa, and the resistance is greater than 1500MΩ at 25°C at DC500V, 175°C (some even 204°C) ) at DC500, the resistance is greater than 50MΩ. At present, there are two mai...

Images