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Post by arteus on Aug 13, 2016 2:40:13 GMT -6
Hi I'm new to crystalline glazing, nevertheless my research spirit is driving me to explore rare earth potential in Crystall formation along with color subtleties. Anybody tried any of above or other rare earths such as gadolinium, Thulium, Yttrium, Lutetium? Especially I'm interested to find out interaction with common colorantssuch as CuO, COo,Mno.. Has any dissertation been written to the subject to day?
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paul
Junior Member
Posts: 51
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Post by paul on Aug 13, 2016 9:46:50 GMT -6
I am not aware of any research or documentation on this subject, but I import these Rare Earth Oxides direct from the Manufacturer in China.
I can provide you with competitive prices, pauldbrown@fuse.net
Thanks
Paul
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Post by tileman2 on Aug 13, 2016 20:59:23 GMT -6
Arteus:
You will not find much, I have spent many hours looking. I have most of the rare earths, one produces a very nice lavender on its own. Yttrium has some effects on cobalt, and some on copper. The very first crystal I got out of the kiln was from praseodymium: white background with silver crystals. Tried numerous times since, but have never been able to reproduce it. Neodymium produces a deep lavender at 5%, and adding just 0.10% of iron will lighten the color slightly, and add a tinge of silver in the crystals. The only ones I would recommend is praseodymium, yttrium, and neodymium. Just remember they are weak oxides, and regular oxides will overpower them easily. Just 0.05% of cobalt will change them, and as little as 0.10 copper, manganese, or magnesium will likewise change their colors. I do believe some exciting colors could be had, just never taken the time.
Tom
Edit: think you will find more info in the glass arts rather than the clay arts.
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Post by tileman2 on Aug 14, 2016 6:56:32 GMT -6
5% Neodymium with 0.10% iron. Will also have to adjust your ramps holds a little, rare earths seem to like slightly less heat, although I have not tested that to any degree.  Happy experimenting. Tom |
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gczop
Full Member
Posts: 202
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Post by gczop on Aug 19, 2016 7:58:17 GMT -6
Fara Shimbo's book Crystalline Glazes deals with this. Jon Singer has an article, this may help to locate it.http://jossresearch.org/2011/02/13/joss-research-fluorescent-glaze-photographs-for-clay-times-magazine/.
Consider starting with a combination of erbium oxide (3%) and cobalt in your zinc crystalline glazes.
G
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