polycrystal


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polycrystal

(ˈpɒlɪˌkrɪstəl)
n
(Chemistry) an object composed of randomly oriented crystals, formed by rapid solidification
References in periodicals archive ?
High-efficiency monocrystal and polycrystal solar cells are selected.
There are many CAD/CAM blocks with advantages, such as biocompatibility; durability; esthetics; fewer clinical stages; rapid production, cost effectiveness; different contents; and physical properties, such as lithium disilicate glass ceramic (GCs), leucite-reinforced GCs, fieldspathic GCs, aluminum-oxide, and yttrium tetragonal zirconia polycrystal (2).
Advantage of the strength of the solar modules produced by the automated technology is a high efficiency and the latest model is distinguished by the use of technology polycrystal cells.
It is conversely not a constant force that acts uniformly in each volume portion of the similar crystal but it differs all over in the crystal and polycrystal depending on the local grain boundary configuration in terms of the curvature and grain-boundary intersection lines and points." For detailed quantitative analysis, please consult Raabe [1].
Erel [7] conducted an experiment and studied the effect of electric and magnetic fields on the response of three different types of solar cells (monocrystal, polycrystal, and amorphous Si solar cells).
The polycrystal diffraction method, which used monochromatic X-ray and polycrystalline powder samples, was used in this study.
For biomedical applications, zirconia is usually stabilized with 3 mol% ytrria (yttria-stabilized tetragonal zirconia polycrystal, Y-TZP) [4].
New all-ceramic prosthetic materials, like yttrium tetragonal zirconia polycrystal (Y-TZP), represent a clinical alternative to the metal frameworks of single crowns, bridges, and also for minimally invasive, adhesively luted resin-bonded fixed partial dentures [7, 8].
This method reduces individual particle sizes in a polycrystal and consequently raises the density of grain boundaries (GBs).
(2013) showed how, in contrast to the prisms of Pinna, the prismatic units of Pinctada initiate as single crystals with highly changing orientations and later begin to split into different crystallographic domains, to finally transform into a complex polycrystal. Misorientation profiles across individual prisms consistently show pronounced trends.
Partially stabilized Zr[O.sub.2] is yttria-stabilized tetragonal zirconia polycrystal and has superior mechanical properties such as high fracture toughness and better esthetic performance.
Such an orientation might be known from X-ray diffraction or electron backscatter diffraction [138] measurements or from prior knowledge of the material, e.g., a polycrystal in which the grain orientations, and hence the [a.sub.ij] values, are distributed randomly [43].