Electric Mid&Hi Fired Ceramics
Potters & Sculptors - Making Rock from Mud
CuO3
So I have a recipe that calls for the above. Upon searching you come up with various answers, but the bottom line is that it is copper oxide. What I really want to know is whether it is red, black or some other color. I have both of those and also some blue copper sulphate as well as the ol' standby, copper carb. So what is it?, Buehler, buehler.....? jhp
Replies to This Discussion
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Permalink Reply by Tyler Miller on
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It doesn't exist. There's no such thing as Copper (VI) Oxide. It's a typo. There's such a thing as Cu2O3 (Copper (III) oxide), but I've never actually come across it at any pottery supply store. I think it's more likely that the recipe was calling for copper carb and the C dropped out.
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Permalink Reply by Robert Coyle on
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CuO3... yeah that would be some energetic compound. If it did exist, you probably would not want it in your studio.:-)
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Keep in mind copper carbonate is not pure, but a mix of 50% CuCO3 copper carbonate and 50% Cu(OH)2 copper hydroxide.
So the amount of Black Copper Oxide CuO in each is the following:
CuO% 111.18% Red Copper Oxide - Cu2O takes on extra oxygen in the kiln 100.00% Black Copper Oxide - CuO 71.95% Copper Carbonate (actual 50% CuCO3 / 50% Cu(OH)2) 81.53% Copper Hydroxide - Cu(OH)2 64.38% Copper Carbonate - CuCO3 theoretical
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