STUDY OF ARTIFICIAL CERAMIC BINDER PROPERTIES
IN THE SYSTEM Al
S. V. Zaitsev,
V. A. Doroganov,
E. A. Doroganov,
and E. I. Evtushenko
Translated from Novye Ogneupory, No. 10, pp. 32 – 36, October, 2016.
Original article submitted May 11, 2016.
Artificial ceramic binders based on silicon carbide and high-alumina chamotte are studied. Rheological and
physicomechanical properties of mixed ACB are determined. An optimum content is revealed for silicon car
bide and high-alumina chamotte ACB. It is established that a thin film of mullite forms at the surface with a
firing temperature of 1300°C for ACB specimens of optimum composition.
Keywords: silicon carbide, artificial ceramic binder, refractories, high-alumina chamotte.
Aluminum silicate refractories are used extensively in
technology, and the metallurgical industry uses 60% of them.
High temperatures, chemical corrosiveness, increased speci-
fications for constant chemical composition and metal prop-
erties, give rise to difficulty in selectin stable refractory ma-
terials. In view of this one of the main tasks of the refractory
industry is development and creation of new refractory com-
posites capable of operating reliably at high temperature and
in corrosive media. An increase in refractory composite life
may be achieved by modifying the structure with introduc
tion into the composition of artificial ceramic binders (ACB)
based on silicon carbide SiC, prepared by HCBS technology
Silicon carbide has unique physical and chemical proper
ties, such as high hardness, thermal conductivity, wear resis
tance, and resistance to corrosion and oxidation [3, 4]. The
properties of SiC determine the spheres of its application, the
main ones of which are metallurgy, electronics, chemical in
dustry, atomic energy, and engineering [5 – 8].
It has been shown in [9, 10] that on the basis of SiC it is
possible to prepare artificial ceramic binders that have a
thixotropic-dilation nature of rheological behavior, high vol
ume solid phase concentration, and significant polydisper
sion, and the content of nanoparticles synthesized during
grinding reaches 0.5%. In addition, with modification of
ACB of silicon carbide composition by refractory clay  it
is possible to prepare silicon carbide composites with good
physicomechanical indices. In view of this the aim of the
present work is a study of the effect of different silicon car-
bide ACB concentration on properties of a high-alumina sus-
The main starting components for synthesizing ACB
used were high-alumina chamotte grade ShVG-77 and sili-
con carbide (black). Synthesis of ACB based on silicon car-
bide and mullite corundum chamotte was carried out sepa-
rately in a ball with a volume of 0.1 m
with a corundum lin
ing and milling balls in the optimum pH range with
stagewise charging of material with a gradual increase in vol
ume concentration of solid phase C
. The ACB obtained
were stabilized by gravitation mixing for 6 h. Then their
main property indices were determined (see Table 1). Mix
compositions were studied within which the ACB concentra
tion was varied with a step of 10 wt.%.
Specimens were molded from the original mixed silicon
carbide and high-alumina chamotte ACB in the form of
cubes with a side of 30 mm b slip casting in a gypsum mold.
Specimens were dried at
100 – 110°C in a drying cabinet to constant weight and
fired in a laboratory electric furnace at 1100, 1200, and
1300°C in an oxidizing atmosphere. Soaking at the maxi
mum temperature was 1 h. Specimens were furnace cooled
to room temperature. Physicomechanical properties of the
specimens obtained were evaluated by standard procedures.
X-ray phase analysis of fired specimens was performed in a
DRON-3 diffractometer. In order to identify crystalline
phases a JCPDF international card index was used.
Refractories and Industrial Ceramics Vol. 57, No. 5, January, 2017
1083-4877/17/05705-0526 © 2017 Springer Science+Business Media New York
FGBOU VO V. G. Shukhov Belgorod State Technological Uni
versity, Belgorod, Russia.