Effect of Thermal and Electric Properties of Sintered Ru-Y₂O₃ System on Characteristic of Electrode Consumption

New Cathode Material for Air Plasma Cutting (Report III)

Abstract

This paper describes physical properties of sintered Ru-Y₂O₃ system for cathode material in oxidizing atmosphere ; thermal properties (thermal diffusivity, specific heat and thermal conductivity) and electrical resistivity. And explain the relationship between its physical properties and electrode consumption.
The thermal properties are measured by laser flash method and the electrical resistivity are measured by four terminal method at room temperature.
80Ru-20Y₂O₃ electrode which has superior erosion resistance showed high thermal and electric conductivity comparing with those of Zr and Hf.