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1.
On the Issue of Obtaining High-Density Corundum Ceramics with a Defect-Free POlished Surface and Low Roughness by the SPS Method
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(Not-set)
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The fundamental possibility of obtaining corundum ceramics with density close to theoretical, with defect-free polished surface, with low roughness, using as a starting material finely dispersed non-aggregated ...
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2.
Production of high-density bitstone powders for alumina-based ceramics sintering
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(Science for ceramic production)
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The results of theoretical and experimental studies of methods for obtaining powder fillings with a relative density of more than 0.50 for subsequent sintering of samples of high-density ceramics based ...
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3.
Physical and technological factors that determine the density of composite nano-ceramics Y - ZrO2 - Al2O3
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(Science for ceramic production)
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The features of sintering processes of ceramic materials of the Y - ZrO 2 - Al 2 O 3 system of various initial structural modifications (tetragonal or cubic) have been studied. The influence of the ...
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4.
Special technology features of high-density ceramics. The choice of modifying additives
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(Science for ceramic production)
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The influence of modifying additives on the sintering process, control of the microstructure and properties of ceramics is shown. The types of additives with different character of interaction with the ...
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5.
Special technological features of high-density technical ceramics. Chemical methods for production of starting powders
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(Science for ceramic production)
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Various methods of manufacturing highly dispersed oxide powders and their compounds, which are used to obtain dense and durable ceramic materials with an adjustable microstructure, are considered. The ...
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6.
RESEARCH OF DOMESTIC BORON CARBIDE POWDERS FOR THE PRODUCTION OF REACTION-BONDED CERAMICS
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(Not-set)
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... impact on the density of the blanks and the silicon content after reaction sintering, and the chemical composition of the powders affects the structure of the ceramics. The comparison of the structure ...
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7.
EFFECT OF CeO2 ON THE STRUCTURE AND PROPERTIES OF ALUMINA-ZIRCONIA CERAMICS PREPARED BY PRESSURELESS SINTERING AND HOT PRESSING
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(Not-set)
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... by XRD and EDS. Pressureless sintering led to the stabilization of the cubic ZrO2 phase (c-ZrO2). Hot pressing achieved high relative density (>99 %) and practically no open porosity, while pressureless ...
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8.
SINTERING OF Mg2TiO4 CERAMICS OBTAINED BY THE METHOD OF MECHANOCHEMICAL ACTIVATION OF A MIXTURE OF INITIAL POWDERS
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(Not-set)
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... is calculated using a non-isothermal method. The effect of increasing the firing temperature from 1300 to 1400 ?C on the density and porosity, as well as its microstructure of ceramics was studied. Ceramics ...
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9.
EXPERIMENTAL DETERMINATION OF THE SPECIFIC ENERGY OF DESTRUCTION OF SILICON CARBIDE-BASED CERAMICS UNDER THE INFLUENCE OF MILLISECOND LASER RADIATION
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(Not-set)
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... evaporation of the material have been conducted. The threshold value of the laser radiation power density and the power range corresponding to the minimum energy consumption during laser dimensional processing ...
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10.
INFLUENCE OF NANODISPERSED ALUMINUM OXIDE ON THE PHYSICAL AND MECHANICAL PROPERTIES OF TECHNICAL CERAMICS
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(Not-set)
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... that the introduction of nanodispersed aluminum oxide in an amount of 3 wt. % over 100 wt. % of the total mass improves the abrasion coefficient, acid resistance, density, and strength of the developed ...
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11.
DIELECTRIC PROPERTIES OF LEAD ZIRCONATE CERAMICS PRODUCED FROM PbO AND ZrO2 NANOPOWDERS
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(Not-set)
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The article presents the results of a study of the dielectric properties and harmonic coefficient of lead zirconate-based ceramics synthesized at different sintering temperatures from the initial PbO and ...
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12.
LOW-TEMPERATURE CERAMICS BASED ON WOLLASTONITE AND PEROVSKITE MODIFIED WITH THE ADDITION OF Al2O3–CuO–Li2CO3 FOR LTCC TECHNOLOGY APPLICATION
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(Not-set)
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... ceramics. The dielectric constant was ?r = 4.9...8.0, the tangent of the dielectric loss angle – tg? = (15.3...17.9)·10–3 at a frequency of f = 1 MHz, and the average density is ?ср = 2.44...2.63 g/cm3. ...
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13.
ELECTRON BEAM SINTERING OF ZIRCONIUM DIOXIDE CERAMICS WITH DIFFERENT YTTRIUM OXIDE CONTENT
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(Not-set)
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... been shown that increasing the proportion of Y2O3 in ZrO2-based ceramics leads to a decrease in the density of the sintered ceramics, but it also contributes to the stabilization of the tetragonal phase ...
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14.
THE INFLUENCE OF DIAMOND GRINDING MODES ON THE PHASE COMPOSITION AND CRACK RESISTANCE OF ZIRCONIA-BASED CERAMICS
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(Not-set)
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... 55 and 200 MPa, followed by sintering at a temperature of 1700 ?C for 4 hours. The resulting blanks (both porous and high-density) were machined with different cutting depths in the range of 0.003…0.010 ...
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15.
VACUUM-TIGHT CORUNDUM CERAMICS VK94-1 MODIFIED WITH ZIRCONIUM DIOXIDE
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(Not-set)
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... density, mechanical bending strength and Vickers hardness (microhardness) with the properties of ceramics VK94-1, as well as the effect on these properties of changes in the percentage of zirconium dioxide ...
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16.
EFFECT OF HOT PRESSING CONDITIONS OF CVD-ZnSe POWDER ON THE PROPERTIES OF OPTICAL CERAMICS
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(Not-set)
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The paper studies the effect of vacuum hot pressing (VHP) conditions on the microstructure, density, and optical properties of ZnSe ceramics. Graphite and titanium foils, as well as powdered aluminum oxide, ...
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17.
INFLUENCE OF THE COMPOSITION OF TWO-COMPONENT BARIUM TITANATE CERAMICS ON LINEAR AND NON-LINEAR DIELECTRIC PROPERTIES
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(Not-set)
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The results of a study of dielectric properties and harmonic coefficient for barium titanate ceramics obtained from a mixture of BaTiO3 powders with particle sizes of 400 and 50 nm at different sintering ...
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18.
PRODUCTION OF POROUS CERAMICS ?-Al2O3–3YSZ WITH ADDITIVE OF ?(?)-Al2O3
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(Not-set)
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... glycine or urea as fuels. After firing at 1550 ?C, the ceramics exhibited a closed porosity range of 14.1…24.0 %. The experimental results revealed a linear correlation between density and closed porosity ...
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19.
STUDY OF THE POSSIBILITY OF A STABLE INCREASE IN THE CURRENT DENSITY OF AN ELECTRON BEAM USING A TAPERED GLASS CHANNEL
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(Not-set)
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The possibility of increasing the current density of a beam of charged particles (“focusing”) using tapered glass channels without involving external energy sources is currently being actively implemented ...
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20.
INVESTIGATION OF LUMINESCENT PROPERTIES OF OPTICAL CERAMICS BASED ON YAG AND LuAG CO-ACTIVATED Yb3+ AND Er3+
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(Not-set)
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For the first time, optical ceramics based on LuAG were obtained, simultaneously doped with Yb3+ and Er3+ ions. The optical, spectral-luminescent and kinetic characteristics of ceramics Y2,82Yb0,15Er0,03Al5O12 ...
