from The American Heritage® Dictionary of the English Language, 4th Edition
- n. See yttrium oxide.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. yttrium oxide
from the GNU version of the Collaborative International Dictionary of English
- n. The oxide, Y2O3, or earth, of yttrium.
from The Century Dictionary and Cyclopedia
- n. A metallic oxid or earth, having the appearance of a white powder, which is insipid, insoluble in water, and infusible.
Solid oxide electrolyte 13 is sheet of ceramic material, such as yttria stabilized zirconia.
Already Gadolin had reckoned with the possibility that the yttria isolated by him was not a simple substance and it proved indeed later to consist of several oxides.
In this mineral - later called gadolinite, after him - he had found a hitherto unknown earth, the so-called yttria.
You see there is no such indication; the glass phosphoresces with its usual blue glow, and there is no evidence that a single particle of yttria is striking it.
Very many bodies, such as ruby, diamond, emerald, alumina, yttria, samaria, and a large class of earthy oxides and sulphides, phosphoresce in vacuum tubes when placed in the path of the stream of electrified molecules proceeding from the negative pole.
A U-tube, shown in Fig. 25, has a flat aluminum pole, in the form of a disk, at each end, both coated with a paint of phosphorescent yttria.
The probable explanation is that the vagrant molecules I introduce in the next experiment, happening to come within the sphere of influence of the positive pole, rush violently to it, and excite phosphorescence in the yttria, while losing their negative charge.
Inside the bulb, completely covering the part that would form the negative pole, A, I have placed a substantial coat of yttria, so as to interpose a layer of this earth between the glass and the inside of the tube.
Here is an egg-shaped bulb, shown in Fig 19, containing some pure yttria and a few rough rubies.
With yttria in a vacuum tube, the point of maximum phosphorescence, as