Preparation formula and method of porcelain glaze for high temperature sealing

Abstract

The invention discloses a preparation formula and a method of porcelain glaze for high temperature sealing. The formula comprises the following components in proportion by weight: 47.4% of red lead powder, 25.6% of boric acid, 20.8% of silicon oxide, 2.3% of aluminum oxide, 2.3% of chromic oxide and 1.6% of barium carbonate. The preparation method of the porcelain glaze comprises the following steps: (1) fully and evenly mixing the raw materials according to the formula and filling the mixture into a graphite crucible; (2) after heating a high temperature well type electric furnace to 1350-1400 DEG C, putting the graphite crucible into the high temperature well type electric furnace, and sintering at the temperature range for 4-6 hours; (3) taking an sintered porcelain glaze molten mass out of the electric furnace, quickly pouring into cold water so that the molten mass is cooled suddenly and turns into an porcelain glaze clinker; and (4) after the porcelain glaze clinker is cooled and dried, adding porcelain balls with the diameter of 10mm-25mm and the total weight same as the weight of the porcelain glaze clinker, putting the porcelain glaze clinker and the porcelain balls into a ball milling drum, carrying out ball milling for more than 32 hours, and then passing a 100 mesh sieve to obtain the porcelain glaze powder. The porcelain glaze powder prepared as required is widely applied to the manufacturing of thermocouples and can meet the requirement of high temperature sealing.

Description

technical field [0001] The invention belongs to the high-temperature material manufacturing technology, and in particular relates to the improvement of the preparation formula and method of the high-temperature sealing material. Background technique [0002] Because the diameter of the thermal electrode wire of the thermocouple is generally relatively thin, about 0.5mm, in order to ensure the strength of the welding between the thermal electrode wire and the output wire in the thermocouple, it is necessary to weld a turning wire with a diameter of about 1.2mm at the end of the thermode wire. Connect the wires, and fix and seal the thermode wires and the joints between the thermode wires and the adapter wires before connecting the output wires. However, there is no sealing material that meets the requirements in the domestic market, so it needs to be prepared by itself. Contents of the invention [0003] The purpose of the present invention is to study and determine a form...

AI Technical Summary

Problems solved by technology

However, there is no sealing material that meets the requirements in the domestic market, and it needs to be prepared by itself