Devices and methods for measuring high-temperature resistivity of tin oxide electrodes in substrate glass furnaces

A method for measuring a high-temperature resistivity of a tin oxide electrode in a substrate glass furnace, the method being implemented based on a device for measuring a high-temperature resistivity of a tin oxide electrode in a substrate glass furnace, comprising:

• a direct-current dual-arm bridge, wherein one end of the direct-current dual-arm bridge is connected to one end of a first platinum wire, and the other end of the direct-current dual-arm bridge is connected to one end of a second platinum wire;
• the other end of the first platinum wire is connected to a first platinum terminal, and a first insulating spacer is provided on an upper side of the first platinum terminal;
• and
• the other end of the second platinum wire is connected to a second platinum terminal, and a second insulating spacer is provided on a lower side of the second platinum terminal,
• wherein the method comprises:
• after measuring a height and a cross-sectional diameter of a columnar tin oxide electrode to be measured, connecting two ends of the columnar tin oxide electrode to be measured to the first platinum terminal and the second platinum terminal, respectively, and connecting the two ends of the columnar tin oxide electrode to be measured to the direct-current dual-arm bridge through the first platinum wire and the second platinum wire;
• after fixing the two ends of the columnar tin oxide electrode to be measured by employing a first insulating spacer and a second insulating spacer, placing the device in a high-temperature pit furnace;
• obtaining a resistance value of the columnar tin oxide electrode to be measured using the direct-current dual-arm bridge at a predetermined temperature;
• and
• obtaining a resistivity of the columnar tin oxide electrode to be measured by a resistivity calculating principle based on the height, the cross-sectional diameter, and the resistance value of the columnar tin oxide electrode to be measured.