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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
Journal of the Korean Crystal Growth and Crystal Technology
Journal Basic Information
Journal DOI :
The Korea Association of Crystal Growth
Editor in Chief :
Volume & Issues
Volume 13, Issue 6 - Dec 2003
Volume 13, Issue 5 - Oct 2003
Volume 13, Issue 4 - Aug 2003
Volume 13, Issue 3 - Jun 2003
Volume 13, Issue 2 - Apr 2003
Volume 13, Issue 1 - Feb 2003
Selecting the target year
Nucleation kinetics and technology design for crystal growth from aqueous solution
Kidyarov, B.I. ;
Journal of the Korean Crystal Growth and Crystal Technology, volume 13, issue 2, 2003, Pages 51~55
The interrelation into nucleation and thermodynamic parameters of solutions has been established by plotting of various dependencies: the enthalpy of dissolution, solubility product and super-solubility on ionic salt radii and also the extent of deviation from an ideal Debye -Huckel model of electrolyte solution on solubility product. The possible methods of perfect crystal growth from aqueous solution have been found a priori by separating of known set of pair values of solubility and super-solubility into no less than six-nine characteristic and distinctive sub-sets.
Preparation of epitaxial bismuth titanate thin films by the sol-gel process
Journal of the Korean Crystal Growth and Crystal Technology, volume 13, issue 2, 2003, Pages 56~62
(100) and MgO(100) were prepared by sol-gel process using metal naphthenate as a starting material. As-deposited films were pyrolyzed at
for 10 min In air and annealed at
for 30 min in air. Crystallinity and in-plane alignment of the film were investigated by X-ray diffraction
scan and P scanning. A field emission-scanning electron microscope and an atomic force microscope were used for characterizing the surface morphology and the surface roughness of the film. The film prepared on MgO(100) showed the most poor crystallinity and in-plane alignment, compared to those on the other substrates. While the films on
(100) having high crystallinity and in-plane alignment showed the form of columnar grain growth, the film on MgO(100) which had poor crystallinity showed the form of acicula grain growth.
: Mn powders by hydrothermal method
Park, Sun-Min ;
Journal of the Korean Crystal Growth and Crystal Technology, volume 13, issue 2, 2003, Pages 63~67
: Mn powders containing La and Mn was carried out using
as starting materials by hydrothermal method. In the synthesis of single phase
: Mn powder containing La and Mn, the optimal x value corresponding to La substitution was 0.01 which corresponds to
. The optimal conditions for the preparation of the powder synthesis were 8 M-KOH solvent of hydrothermal solvent,
of reaction temperature and 24 hrs of run time. It was found that the synthesized powders had spherical morphology with average particle size of 70 nm and specific surface area of
A development of fabrication processes of microstructure using SU-8 PR
Journal of the Korean Crystal Growth and Crystal Technology, volume 13, issue 2, 2003, Pages 68~72
In this paper, we developed a new thick photoresist fabrication technology for 3-dimensional microstructures. In general, like as AZ photoresist was coated with thin film thickness about 1
, but photoresist like SU-8 has thickness of several tens
or more and high aspect ratio. When we fabricate a microstructure using the thick photoresist like SU-8, cracks on the SU-8 thick photoresist are appeared by stress which was caused by sudden cooling down during bake of the thick photoresist spun on wafer. Thus, it was hard to fabricate the microstructure using the thick photoresist for electroplating. In this paper, we developed a new process to produce a 3-dimensional microstructure without the crack by stress through a suitable thick photoresist coating, time control of cool down and time control of PEB (Post Expose Bake).
Influence of calcination temperature on the structure of freeze-dried silica gel
Journal of the Korean Crystal Growth and Crystal Technology, volume 13, issue 2, 2003, Pages 73~78
The influence of calcination temperature on the pore structure of freeze dried silica gel derived from tetraethyl orthosilicate (TEOS) was investigated using
adsorption and mercury intrusion techniques. Freeze dried material contained not only 4-6 nm sized mesopores and 6-10
sized macropores, but minor micropores. The change of pore structure due to the increase of calcination temperature was dependant upon the degree of densification.
Synthesis and characterization of GaN nanoparticles by pulsed laser deposition
Journal of the Korean Crystal Growth and Crystal Technology, volume 13, issue 2, 2003, Pages 79~82
GaN nanoparticles were synthesized by the pulsed laser deposition (PLD) process on
substrate after irradiating the surface of the GaN sintered pellet by the ArF (193 nm) excimer laser. At this moment Ar gas pressure of 100 Pa, 50 Pa, 10 Pa and 1 Pa were applied during the ablation process and laser power of 100 mJ and 200 mJ were also applied. The synthesized fan nanoparticles were characterized by XRD, SEM, TEM, XPS and optical absorption spectra. The synthesized GaN nanoparticles had the crystallite sizes of 20~30 nm, and besides, GaN nanoparticles synthesized under low Ar gas pressure compared to the others corresponded with stoichiometry, and the optical band edge of the GaN nanoparticles was blueshifted.
Microstructure of the (Nd/Y)-Ba-Cu-O superconductors by floating zone melt growth process
Journal of the Korean Crystal Growth and Crystal Technology, volume 13, issue 2, 2003, Pages 83~87
superconductor was directionally grown by floating Bone melt growth process with a large temperature gradient in air. Cylindrical green rods of (Nd/Y)1.8 oxides were fabricated by cold isostatic pressing (CIP) method using rubber mold. Microstructures were observed by SEM and TEM and superconducting properties were measured by a SQUID magnetometer. Nonsuperconducting
inclusions were uniformly distributed within the superconducting
matrix. The directionally melt-textured (Nd/Y) 1.8 superconductor showed an onset Tc
90 K and a sharp superconducting transition.
Effect of heat treatment and sintered microstructure on electrical properties of Mn-Co-Ni oxide NTC thermistor for fuel level sensor
Journal of the Korean Crystal Growth and Crystal Technology, volume 13, issue 2, 2003, Pages 88~92
The correlationship between heat treatment condition and electrical properties of the Mn-Co-Ni oxide NTC thermistor for fuel level sensor was investigated by the X-ray diffractometry, density measurement, and electrical properties measurement such as resistivity, B constant, and thermal dissipation constant. It was shown that the heat treatment of NTC thermistor was responsible for sinterability of Mn-Co-Ni oxide. The highest density of 5.10 g/㎤ was obtained at
, 2 hours, at which the densification was almost completed. This is also manifested from the microstructural observation. It is found that the electrical resistivity and B constant are increased at the elevated sintering temperatures. The NTC specimens prepared in this study showed the conventional decrease of resistance with the measured temperature and the linear behavior of output voltage with fuel levels. Therefore, the electrical properties of thermistor were closely correlated with sintering condition. and the Mn-Co-Ni oxide thermistor prepared in this study has a great possibility enough to apply for an automobile fuel level sensor.
Computer simulation of electric field distribution in FALC process
Journal of the Korean Crystal Growth and Crystal Technology, volume 13, issue 2, 2003, Pages 93~97
The crystallization behavior of amorphous silicon is affected by direction and intensity of electric field in FALC（Field-Aided Lateral Crystallization). Electric field was calculated in a simplified model using conductivity data of Mo, a-Si,
and boundary conditions for electric potential at the electrodes. The magnitude of electric field intensity in each corner of cathode was much larger than that in the center of patterns, and the electric field direction was 50~60 degree outside to cathode. And electric field intensity at a relatively small pattern was larger than that of a large pattern.