Molybdenum glass melting zirconia electrodes (MoZrO2 molybdenum electrode) is a new molybdenum-based alloy electrode. MoZrO2 molybdenum electrode is produced by powder metallurgy method which doped with a certain amount of ZrO2 into molybdenum powder. ZrO2 can significantly improve the performance of molybdenum electrodes, such as high temperature strength and corrosion resistance. Compared to pure molybdenum electrodes, MoZrO2 molybdenum electrodes not only retains pure molybdenum electrode high temperature resistance, good corrosion resistance, excellent thermal conductivity and machinability and other good properties, but also it has better corrosion resistance and creep resistance.
Compared with molybdenum electrode, at 1600 ℃ MoZrO2 electrode steady-state creep rate is lower than pure molybdenum about 5 times. Besides, the tensile strength and 0.2% proof stress is higher than pure molybdenum. So manufacturers can increase MoZrO2 electrode using length in glass furnace and reduce the risk of bend or even break during work.
In terms of corrosion resistance, MoZrO2 electrode is more stable in molten glass, and clarifying agents (Sb2O3) has smaller corrodibility on MoZrO2 electrode than pure molybdenum electrode. Sb2O3 is commonly used fining agents, but at high temperature, it will react with molybdenum to produce metal antimony (Sb). Antimony has serious erosion on molybdenum. Related scholars compared the pure molybdenum and MoZrO2 corrosion phenomenon in molten antimony found pure molybdenum has more serious erosion. Observed TEM of two kinds of electrode morphology found at high temperatures MoZrO2 electrode has a good crystal structure, and ZrO2 particles on the grain boundary can play a good protective effect, so the corrosion resistance of MoZrO2 electrode is strong.
MoZrO2 electrode compared to pure molybdenum electrode has excellent corrosion resistance and excellent high temperature strength in molten glass exhibits, so this new type molybdenum electrode has been increasingly used in a variety of glass manufacturing.