QUANTITATIVE STRUCTURAL ANALYSIS OF PERMEABLE CERAMIC
MADE FROM NARROW-FRACTION ELECTROCORUNDUM POWDER
OF DIFFERENT FINENESS
B. L. Krasnyi,
V. P. Tarasovskii,
V. I. Koshkin,
A. A. Vasin,
M. N. Kormilitsin,
R. A. Novoselov,
and A. D. Smirnov
Translated from Novye Ogneupory, No. 11, pp. 58 – 62, November 2015.
Original article submitted September 8, 2015.
Permeable ceramic pore structure made from electrocorundum powder grades F 100, F 150, F 240, and F 600
is studied using SEM-image computer analysis in order to obtain such quantitative indices as pore shape, pore
shape distribution, pore sinuosity factor, etc. It is shown that ceramic pore shape has a decisive effect on its
Keywords: permeable ceramic, electrocorundum powder, shape factor, sinuosity factor, permeability factor.
According to contemporary interpretation a material
structure is spatial organization of the whole material sub-
stance specified by a collection of morphometric, geometric,
and energy features, and determining the composition, quan-
titative ratio, and reaction of material components .
Morphometric features include size, shape, nature of surface
structural elements, and their quantitative ratio, geometric
features, i.e., spatial composition, structure, energy, type g
structural bonds, and overall energy of a system. Thus, for
ceramic material it is possible to formulate what size and
shape of structural elements (grains) and pores determine
morphometric features of a structure and their orientation
within space determined the geometric features or texture.
Among numerous methods used for studying ceramic
material structure, the most informative and descriptive is
scanning electron microscopy (SEM). An important advan
tage is SEM is the fact that it makes it possible to obtain an
image of a test structure, and to carry out various operations
for treatment of an image and quantitative evaluation of its
morphological and geometric features. The method makes it
possible to perform research on a small sample over a wide
magnification range from optical to electron-optical. The
present article provides results of studying the structure of
permeable ceramic (morphometric and geometric features)
of different electrocorundum powder factions using an SEM
image computer analysis procedure for obtaining quantita-
tive properties .
In order to prepare porous permeable ceramic specimens
of electrocorundum powder grades F 100, F 150, F 240,
F 600 produced by OAO RUSAL Boksitogorsk (according to
TU 3988-064-00224450–94) and aluminosilicate binder
were used. The ratio of electrocorundum:aluminosilicate
binder in a charge for specimen molding was 85:15 (wt.%).
The temporary processing binder used was binder grade
KB2097 from Zscimmer & Schwarz GmbH, Germany,
which was added in an amount of 10 wt.% (above 100 wt.%
of a charge). Test specimens were prepared by semidry
two-sided compaction in a hydraulic press under a pressure
of 30 MPa in the form of disks 40 mm in diameter and
3–5mmthick. Specimens were fired at 1300°C with soak
ing at the maximum temperature for2hinafurnace with sil
icon carbide heaters.
Grain size composition properties of the electrocorun
dum powders used are shown in Fig. 1 and provided in Ta
ble 1 (Analyzette 22 laser particle analyzer from Fritsch
GmbH, Germany). Analysis of results of studying the
physicotechnical properties of powders make it possible to
conclude that all four of the electrocorundum powders se
lected for study have the form of particles approaching iso
Refractories and Industrial Ceramics Vol. 56, No. 6, March, 2016
1083-4877/16/05606-0626 © 2016 Springer Science+Business Media New York
ZAO Scientific-Technical Center Bakor, Shcherbinka, Moscow,
FGBOU VPO Moscow State Industrial University, Moscow, Rus
FGAOU VO Sevastopol’ State University, Sevastopol’, Russia.