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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
Journal of the Korean Ceramic Society
Journal Basic Information
Journal DOI :
The Korean Ceramic Society
Editor in Chief :
Volume & Issues
Volume 23, Issue 6 - Jun 1986
Volume 23, Issue 5 - May 1986
Volume 23, Issue 4 - Apr 1986
Volume 23, Issue 3 - Mar 1986
Volume 23, Issue 2 - Feb 1986
Volume 23, Issue 1 - Jan 1986
Selecting the target year
A Study on the Fabrication of Sialon Powder through the Thermit Ignition
Journal of the Korean Ceramic Society, volume 23, issue 2, 1986, Pages 1~6
The mixture of (opalit+Al) powder was ignited by electric shock for the preparation of sialon powder by changin the contents of Al. The formation reaction of sialon was investigated by heating the specimens of ignited mixture (opalit+Al) in nitrogen atmosphere at various temperature. The phases existing inthe specimens nitrided between 1400 and 1
and AlN but the mixture
-sialon and 15R-sialon was finally acquired by heating the ignited mixture of (Al 50%+opalit) at 175
for 3hours in nitrogen atmosphere.
Mullitization of Kyanite-Al Mixture
Journal of the Korean Ceramic Society, volume 23, issue 2, 1986, Pages 7~12
As the other silicate minerals such as kaolinite and pyrophyllite kyanite (
) is transformed to mullite and free silica or glassy phase at high temperature. Therefore
is commonly added to kyanite in order to increase the mullite-yield. In case of
-addition mullite-yield depends on the reactivity of added
with free silica which occurs from transformation of kyanite or exists as accessory minerals. It is well known that addition of activated
Al powder is added to kyanite to utilize the aluminothermal reac-tion of Al powder in reaction of mullite-formation.
Preparation of Composite Polycrystals Including
Journal of the Korean Ceramic Society, volume 23, issue 2, 1986, Pages 13~20
Composite polycrystals including
crystal which have needlelike regular structure are useful for the high resolution optical devices. For the purpose of obtaining the composite polycrystals described above the melts of eutectic composition in the three eutectic systems including
composition were unidirectionally solidified at a rate of 0.05 and 0.25 cm/h under a thermal gradient of 10
/m. Composite polycrystals of relatively regular structure in which needlelike
crystals were arrayed in parallel with
crystal matrix were obtained when the eutectic melt of
system was solidified at a rate of 0.25 cm/h. Partial structural irregularity however was found in the obtained composite polycrystals.
Synthesis of Submicron
Powders by Wet Process
Journal of the Korean Ceramic Society, volume 23, issue 2, 1986, Pages 21~30
powders had been synthesized with chemical wet process that
solution was sprayed into the mixed solution of
carrier gas. The characteristic properties of powders obtained from this experiment were as follows. The optimum synthesis condition in reaction bath was above PH 8.5 and under
The particle size of precipitated SrTiO(OH) powders dried at 6
was under 0.01
and uniform. Amorphous precipitated complex powders emitted adsorbed water at 15
less that and crystalline
powders was produced from calcining the complex at 30
. Sintered body of SrTiO3 fired at 133
showed that relative dielectric constant was 228 at 1MHZ and bulk density was 4.73g/
Effect of Silica Coating on Particle Shape and Magnetic Properties of Iron Powder (II)
Journal of the Korean Ceramic Society, volume 23, issue 2, 1986, Pages 31~37
The effect of dehydration temperature on the reduction process of silica-coated hematite was invest-igated The particle shape and magnetic properties of the products reduced from hematite at various conditions and the oxidation resistance of silica-coated iron powder were examined. It was revealed that single phase iron powder obtained over 45
had good magnetic properties. The iron powder manufactured between 45
displayed the maximum coercive force as a result of maintaining its acicular shaped. However the coercive force of iron powder reduced over 50
was decreased. The oxidation resistance of silica-coated iron powder in air was very good up to 11
and for 12 days.
Ettect of Sodium Gluconate on the Hydration of 3CaO.
Journal of the Korean Ceramic Society, volume 23, issue 2, 1986, Pages 38~42
The adsorption behavior of 3CaO.
system by measuring adsorp-tion isotherm DTA and IR sepctra. The adsorbed amount of sodium gluconate on 3CaO.
is exceedingly larger than 3CaO.
and portland cement. From the DAT experiment the formation of complex is observed by the characteristic exothermic peak of the complex at 45
It is now strong deduced that the chemical bonding between gluconate anion and 3CaO.
should be coordinative due to the complex formation on the surface 3CaO.
from the IR spectra of sod-ium gluconate only and 3CaO.
A Study on Color in Apatite with the Addition of Transition Elements
Journal of the Korean Ceramic Society, volume 23, issue 2, 1986, Pages 43~49
By simple substitution of divalent cobalt nickel copper ion in the calcium-fluorapatite the ability to produce color was explored. To determine the solubility limit of cobalt nickel copper in the calcium-fluorapatite and the absorption spectrum with the addition of each transition elements XRD and visible range Spectroscopy were emp-loyed.
Study on Stabilized CdS-CdSe Red Stain A Study on Syntheisis of CdS-CdSe Red Stain and Zircon
Journal of the Korean Ceramic Society, volume 23, issue 2, 1986, Pages 50~54
Effects of additionof
, NaBr and LiF on the formation of Zircon and the synthesis of CdS-Se red stain were investigated by means of XRD, DTA and the color standard and color nomenclature. The red stain of CdS-Se system shows a little difference dependent on firing temperature on firing conditon. Consequently it forms a good soid-solution with red color under the ratio of CdS and Se 3.5 -4.1 at 58
. But it changes to dark red as increasing Se. LiF is the most effective in mineralizer to preparae zircon with the equilbrant molar
and ZrO Zircon makes a good preparation in 0.33 mole LiF from 90
Studies on Wear Mechanism of High Alumina Brick for Arc-furnace Roof
Journal of the Korean Ceramic Society, volume 23, issue 2, 1986, Pages 55~63
In variuos physcial and chemical cause of damage of refractories for steel makin the clarification of the wear mechanism of brick is situated on important factor. In the present paper the wear mechanism of high alumina brick for the arc-furnace roof were inves-tigated by means of XRD, EPMA. SEM and microscopy. The results obtained were summerized as follows : (1) The altered layers which exist in high alumina brick used for arc-furnace roof were verified by mineral chemical analysis and EPMA. (2) The diffusion of materials combined with slag dust and iron oxide from furnace atmosphere in high basic process from hot face to interior was verified. (3)Activation energy for the synthesized slag permeated into the unused brick texture was 47-51 kcal per mole.
Quantitative Analysis of Mineral Composition in Porland Cement Clinker by X-ray Diffraction
Journal of the Korean Ceramic Society, volume 23, issue 2, 1986, Pages 64~70
In this investigation x-ray diffraction method was mainly studied for quantitative analysis of clinker mineral composition. And also optical microscopic observation and Bogue calculation method were applied to compare with the x-ray diffraction method. In the procedure of x-ray diffraction analysis graphite monochromator automatic divergence slit and spinner for sample holder were used for minimizing the error due to the operation of the equipment. Especially the separation of overlapped peaks were proceeded by micro-processor automatically. The results of x-ray diffraction method for synthesized clinker were consistent with the Bogue value and the results of optical microscopic observation. However the results of quantitative analysis of mineral composition or commercial clinker containing solid solution of minor component were different from the Bogue value. On the other hand they agreed reasonably well with results of the optical mic-roscopic observation.