NEW TECHNIQUE TO CONTROL IN-SITU OXYGEN FUGACITY IN WATER-FREE HIGH-PRESSURE SYSTEM - USING CU-O AS AN EXAMPLE

Through inserting a solid oxygen-specific electrolyte (YSZ) inside and exerting an electrical power of direct current outside between the sa mple and oxygen reservoir (an solid oxygen buffer), oxygen was driven by the power from the cathodic electrode area into the positive electr ode area at high temperature and high pressure. In this way, the oxyge n fugacity in the sample was in situ controlled independently of tempe rature and pressure. By using Cu-O system as an example, this techniqu e was proved to be successful.