REVIEW OF RF PATENTS FOR REFRACTORY INVENTIONS
Review prepared by the editorial staff of Novye Ogneupory
Translated from Novye Ogneupory, No. 7, pp. 62 – 63, July, 2013.
A METHOD OF FABRICATING ALUMINUM-OXIDE
S. M. Barinov, V. A. Demin, A. V. Ivanov, D. A. Ivanov,
A. Yu. Omarov, A. Kh. Khairi, A. D. Shlyapin,
and S. D. Shlyapin
Patent RU 2453517
IPC C04B35/111, C04B35/626, C01F7/42
The invention pertains to the technology of high-temper-
ature ceramic materials used for construction purposes with
elevated thermomechanical characteristics (lining, thermal
plants, thermally stable ammunition, elements of shock-re-
sistant protection). The technical result of the invention lies
in an increase in the thermal stability of ceramic and in its
strength when subjected to the effects of impact as well as a
reduction in its sintering temperature.
1. A method of fabricating aluminum oxide construction
ceramic that comprises treatment of aluminum alloy with a
water-containing agent, separation from the mother liquor of
the resulting sediment, washing, drying, and heat treatment
of the sediment, preparation of a charge from the resulting
product, and molding and sintering of the shaped billets. The
method is distinguished by the fact that an aluminum alloy
with silicon contained in quantities of 10 – 14 wt.% is treated
with an aqueous solution of caustic sodium with concentra
tion 5 – 27% upon heat dissipation from the reaction space
by means of a cooling agent with temperature of 15 – 25°C,
that a sediment of aluminum hydroxide with inclusions of
sodium metasilicate is separated from the mother liquor, and
that washing of the sediment is performed at a pH of the me
2. The method of Part 1 is distinguished by the fact that
an alloy of aluminum with silicon, found in the form of frag
ments, chips, filings, and granules is treated with an aqueous
solution of caustic sodium.
3. The method of Part 1 is distinguished by the fact that
drying of the sediment is performed in open air at
80 – 200°C.
4. The method of Part 1 is distinguished by the fact that
the sediment is subjected to heat treatment in open air at
1280 – 1350°C for1–3h.
5. The method of Part 1 is distinguished by the fact that
a 7 – 10% solution of polyvinyl alcohol in a quantity of
5 – 7% scaled on the basis of dry residue of the substance is
added in order to prepare the charge in the form of a finely
divided product obtained following heat treatment of the sed-
6. The method of Part 1 is distinguished by the fact that
molding of the billets is performed by means of extrusion un-
der a pressure of 150 – 200 MPa.
7. The method of Part 1 is distinguished by the fact that
sintering is performed in open air at 1450 – 1500°C for
Inventions Bulletin: Utility Models,
No. 17, 191, 192 (2012)
A METHOD OF FABRICATING THE SHEATHING
OF A RADOME FROM REACTION-BOUND
I. N. Kurskaya, V. N. Rudykina, I. Yu. Kelina, A. S. Shatalin,
V. Yu. Sheyanov, K. B. Shamshetdinov, and A. I. Ganichev
Patent RU 2453520
IPC C04B35/591, C04B41/84
The invention pertains to the field of aviation and rocket
technology, chiefly to a method of fabricating the sheathing
of the control radomes of rockets. The technical result of the
invention is seen in the fabrication of high-quality, large-di
mension sheathings of radomes from silicon nitride with the
complex of properties required for radio transparent materi
als and articles, such as high strength, near-zero porosity, and
dielectric characteristics that are stable over a broad tempera
ture interval, including low dielectric losses.
1. A method of fabricating the sheathing of radomes
from reaction-bound silicon nitride that comprises mixing of
Refractories and Industrial Ceramics Vol. 54, No. 4, November, 2013
1083-4877/13/05404-0340 © 2013 Springer Science+Business Media New York
OOO Intermet Inzhiniring, Moscow, Russia.
Subsequently we use the abbreviated name Bulletin.