Could someone give me a very brief 'review' of the role of oxygen in copper & various grades.
As someone who constructs a lot of apparatus, sometimes involving 77K or4.2K, sometimes at >300K, sometimes high currents, I often use copper. Its electrical & thermal conductivity are often important.
There are loads of different grades, & sometimes you cannot get the shape/size you want in the premium OFHC oxy-free-high-conductivity material, which is also expensive & horribly soft especially if its been heated.
You also see PDO (phosphorous deoxydised), often tube, poor conductivity esp. at low temperature ETP electrolytic tough pitch FRHC fire refined high conductivity other unqualified 'high conductivity' HC grades.
Could someone summarise the role of oxygen in copper (obviously crucial) & something about these other grades with regard to thermal & electrivcal conductivity? Or point me to a coherent comparison? Its sometimes hard to find data, especially at low (or elevated) temperatures, and its very hard to get an overall 'picture' of the situation. Yes, I have don Google searches; hard to form a clear overall view! I'm a half electronic engineer half physicist; Im not a metallurgist.