Preparation of Spherical Particles with Quartz Single Crystal

2005 ◽  
Vol 34 (1) ◽  
pp. 58-59 ◽  
Author(s):  
Minahiro Okabayashi ◽  
Kenji Miyazaki ◽  
Toshio Kono ◽  
Miyoko Tanaka ◽  
Yumio Toda
Keyword(s):  
Single Crystal ◽  
Spherical Particles ◽  
Quartz Single Crystal

Surface Morphology Studies on Laser Irradiated Target and Bi(Pb)SrCaCuO Thin Films

2020 ◽  
Vol 995 ◽  
pp. 89-93
Author(s):  
A.N. Jannah ◽  
S.A. Halim ◽  
H. Abdullah
Keyword(s):  
Thin Films ◽  
Solid State ◽  
Surface Morphology ◽  
Single Crystal ◽  
Second Harmonic ◽  
Pulsed Laser ◽  
Bulk Sample ◽  
Spherical Particles ◽  
Variable Pressure ◽  
Scanning Electron

In this study, pulsed laser deposition technique was used to deposit bismuth plumbum strontium calcium copper oxide {Bi (Pb)SrCaCu0} thin films on MgO single crystal substrate. Solid state procedure which is inexpensive technique used in the production process of the Bi (Pb)SrCaCu0 superconductor bulk sample. In this work, Handy YAG Lasers (model: HYL 101 E) has been used. It is a high power class 4 solid state (ND: YAG) Q-switched pulsed laser and 532 nm (visible green: second harmonic) has been used to ablate the films. The substrate used in this work was single crystal MgO with the (100) orientation. Scanning Electron Microscopy (SEM) was used to observe the microstructure of fracture surface and cross section of thin film materials. Variable Pressure Scanning Electron Microscope (LEO-VPSEM) was used to study the correlation between the microstructure features. SEM studies have shown that the surface morphology of the bulk sample comprises platelets of average size ≈10μm with uniform and homogenous microstructure. The typical morphology of the as deposited films showed a continuous phase, granular structure, which spherical particles up to 5μm in diameter. The most prominent types of particulates BPSCCO films on MgO substrate are droplets with smooth surface, bigger droplets with granular surface, spherically-shaped features confined by randomly oriented facets, submicron rod-like features, Cu-enriched needles, platelets, irregularly-shaped Cu-rich outgrowths, strongly Cu-enriched tabular outgrowths, big target fragments, island growth structure, cubic and rectangular cubic structures. SEM analysis also showed that the deposition time have a pronounced influence on the particle size. The target morphology, which develops under laser-irradiation, depends on the laser fluence and the technique, by which the laser beam is moved relatively to the target during ablation. Laser-irradiated surfaces normally become altered both physically and chemically and morphological changes take the form of periodic structures such as ripples and ridges.

Determination of the relaxation function in a quartz single crystal

1986 ◽  
Vol 29 (10) ◽  
pp. 840-844 ◽  
Author(s):  
A. N. Gubkin ◽  
A. D. Vinogradova ◽  
E. A. Rudenchik
Keyword(s):  
Single Crystal ◽  
Relaxation Function ◽  
Quartz Single Crystal

Experimental observation of quasicerenkov radiation in the quartz single crystal

1991 ◽  
Vol 79 (4) ◽  
pp. 287-288
Author(s):  
A.R Mkrtchyan ◽  
H.A Aslanyan ◽  
A.H Mkrtchian ◽  
R.H Gasparian ◽  
A.Kh Mkhitarian ◽  
...  
Keyword(s):  
Single Crystal ◽  
Experimental Observation ◽  
Quartz Single Crystal

Modulation of a Monoenergetic Neutron Beam Diffracted by a Vibrating Quartz Single Crystal

1969 ◽  
Vol 31 (2) ◽  
pp. K95-K97 ◽  
Author(s):  
R. Michalec ◽  
B. Chalupa ◽  
V. Petržílka ◽  
D. Galociová ◽  
J. Zelenka ◽  
...  
Keyword(s):  
Single Crystal ◽  
Neutron Beam ◽  
Quartz Single Crystal ◽  
Monoenergetic Neutron

Structure of the Room-Temperature 2.5 eV α-Quartz Single-Crystal Pulsed Cathodoluminescence Band

2018 ◽  
Vol 39 (1) ◽  
pp. 75-82
Author(s):  
S. N. Andreev ◽  
V. A. Kozlov ◽  
S. A. Kutovoi ◽  
N. V. Pestovskii ◽  
A. A. Petrov ◽  
...  
Keyword(s):  
Single Crystal ◽  
Room Temperature ◽  
Quartz Single Crystal ◽  
Pulsed Cathodoluminescence
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