SCIENTIFIC ABSTRACT BOROVIK, Y. S. - BOROVIK-ROMANOV, A. S.

• Document Type: CREST
• Collection: Scientific Abstracts
• Document Number (FOIA) /ESDN (CREST): CIA-RDP86-00513R000206510017-9
• Release Decision: RIF
• Original Classification: S
• Document Page Count: 100
• Document Creation Date: November 2, 2016
• Document Release Date: June 9, 2000
• Sequence Number: 17
• Publication Date: December 31, 1967
• Content Type: SCIENCEAB

, 1
0095
B/057,61/031/011/010/019
Long high-pressure arca B100108
losses in the eleotrodas were determined by measuring the quantity of heat
set free in the electrodes and in the casing of the chamber. As the arc
length is increased from 1 to 5 cm, the portion cf electrode losses drops
from 80 to 45 ~fj. The volt-ampere characteristics of a helium arc are
shown in Fig. 4, and the arc voltage as a function of helium pressure iss
plotted in Fig- 5. Finally, the results are compared with the theory of'
the-"channel model" of arcs (H. Maecker, Erg. d. ex. Naturw., 2 , 29),
1951; W- Finkelburg, H. Maecker, Handb. d. Phys., 22, 254, 195J6. Suming
up: 1) If the gas surrounding the arc rotates, it Is possible to obtain
stable long arcs at helium pressures of 1 - 100 atm. 211 In arcs longer
than 5 cm the greater part of energy is set free in the column. 3 At
pressures above 20 - 30 a,tm, radiation losses will predcminate. 4~ A
study of the interconnection between pressure, voltage drop, and curre-nat
in the arc makes it possible to calculate the radius of the arc channel,
the plasma temperature,and the ionization degree. There are 5 figures and
10 references: 1 Soviet and 9 non-Soviet.
SUBMITTED: March 20, 1961
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S/126/62/ol3/003/022/023
E039/El35
AUTHORS: Borovik, Ye.S., and Usikovas N.G.
TITLE: The properties of mixed ferrites of bari7um and
strontium
PERIODICAL: Fizika metallov i metallovedeniye, v-13, no.3, 1962,
47o-474
TEXT: Barium and strontium ferrites belong,to the class of
hard ferromagnetic materials but, by comparison with magnetic
alloys, these ferrites have a lower induced residual Br and lo-or
magnetic energy (BH)Max, although they have an increased
coercive force Hc. According to the literature the magnetic
energy of hard ferrites can be increased by the introduction of
certain oxides. In this paper is described an investigation of
the mechanical and magnetic properties of mixed hard ferrites of
the composition: B&I-x Sr XO * 6Fe 203* Thes e ferrites were
prepared from the appropriate mixture of barium and strontium
carbonates and iron oxide, initially fired at 1100 OC. The
resulting ferrite was ground and pressed into samples of
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The properties of mixed ferrites S/126/62/013/003/022/023
E039/E135
1 cm length and 0.18 cm2 cross-section at 17 tons/cM2. They
were then fired at 1200-1300 OC. The magnetic measurements wero
made by the field reversal method for fields up to 7000 oersted
at room tomperature. In this system of ferrites there appears
to be a non-monotonic dependence of properties on composition.
For the optimum temperature of sintering the ferrite
Ba Sr o.6Fe 0 possesses better, and the ferrite
0.75 0.25 2 3
BaO.25 Sr 0.75 o.6Fe20 3worse properties than pure ferrites. The
better properties of the former are a measure of its superior
sInteirIns qualltlez. All the magnetization measurements were
reduced to a single -value of density 4.8 g/cm2 for comparison
(sintering temperatuxe 1230 OC). The maximum on the (BH)max
curve occurs at x = 0.25, and the minimum at x = 0.75.
Values of the m�crohairdness of samples of fer-vites of d�ffevent
composition i%rere alai) measured. It is clear that a mixed
ferrite of the composition Ba 0.7 Sro .30' 6Fe203is a better
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The properties of mixed ferrites.. S/126/62/013/003/022/023
E039/E135
magnetic material thanthe pure ferrite of barium and strontium.
Professor B.Ya. Pines is thanked for his advice.
There are 5 figlires and 2 tables.
ASSOCIATION; Khar1kovskiy gosudarstvennyy universitet imeni
A.M. Gor1kogo
(Xharlhov State University imeni A.M. Gor,kiy)
SUBNITTED: Initially, May 3, 1961;
After revision, September 12, 1961.
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39757
S/126/62/014/ool/ol6/ol8
z194^435
AUTHORS: Boravik Ye.S. Mam&luy, Yu.A.
TITLE: The magnotic susceptibility of coarse grained.
hexagona]6 ferrites
PERIODICAL: Fizika motallov i metallovedeniye, v.14, no.1, 1962,
146-147-
TEXT: In previous articles the authors studied as functions of
temperature the susceptibility of hexagonal ferrites of Ba, Sr,
Pb, whose special fe'Aktur* is the absence of an increase in the
initial susceptibili ty on approaching the Curie point (absence of
Hopkinson effect). This feature could be due to some special
feature of magnetic structure leading to a higher coercive force
and might not be, a typical property of the materials. It was
accordingly of interest to test these f*rrites when produced at
higher firing temperatures, i.e. when they had coarse grains.
The barium and strontium ferrit'e specimens were prepared'as before
but were twice fired at 14000C for 1.5 hours, during which the
grain size grow to I mm in cross-section. The result was a
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S/126/62/014/001/016/olil
The magnetic susceptibility'... E194/9435-
considerably re-duced coercive force, for instance for the bariumi
ferrite from 30150 to 300 00, yet the Hopkinson effect remained
absent. Its absence is therefore typical of hard hexagonal
ferrites and is not due to special features of the domain
structure in the condition of h1gh-coercivity. rhere in I figure.
ASSOCIATION: Khikrlkovskiy gosuniversitet in. A.M.G'orlkogo
(K]-,mrlkov Stott University ineni A.M.Gorlkiy)
SUBMITTED: October 17, 1961
V(
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S/126/62/0,~,M;6/oWo.:zo. i
E073/E420
AUTHORS: Borovik, Ye.S.,.Yakovleva, N.G.
TITLE: Theinfluence of texture on the magnetic propert-ii. 13 of'
mixed ferrites of barium and strontium
PERIODICAL: Fizika metallov i metallovedeniye, v.14, no.6, iq6n,
927-930
TEXT: Of the statistically isot~ropic.mixed ferrites, the
r6r"te BaO 75S`0 n5o.6Fe 203 hae the highest magnetic energy
reaching 1.45 x 166 Gauss Oe. Mixed ferrites of this system 1which'
were statistically anisotropic, due to texture,were investigat 11
frbm the point of view of determining the*possibility of increelng
the residual induction Br and maximum mhgnetic energy (13H)max-
The anisotropy was produced by applying a magnetic field (5500 Oe
at the beginning, 10000 Oe at the end) during the process of
pressing the powder-water mixture; after which the powder was
additionally compressed (4 tons/cm2) in the~same (lie. The
pressings were then dried and sintered at 1160 to 1260% for
1 hour. To permit accurate determination of the influence of the'
anisotropy, identical isotropic specimens. were produced by
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The influence of toxture
S~126/62/014/006/oi6/,D20
E67~/E420
pressing in the absence of,a magnetic field '" .. The optimum
sintering temperature pro,~4d to be 12300C and for this temperature
the ferrite Bao.?5SrO.250-6P0203 had the highest (BH)Max,
equalling 2 .9 x 06 Gauss O'e, a residual induction Br equalling
4000 Gauss and a coercive force jHc of about 3000 Oe.
(BH)max of the anisotropic specimens was almost twice an high and
BrI and Hc were almost t~e same as the r4papective values of the
isotropic control specimens. I The obtained.results are-
reproducible. Thera are 5-figure~.
ASSOCIATION: Kharlko,irskiy gosudarstvrnnyy universitat
(Kharlki)v State University).
SUBMITTED: October 14, 1962 (initially)
May 12, 1962 (after revision)
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AUTHORS:
TITLE:
PERIODICAL:
0 /62/032/004/008/07
B162/3102
Ye and Limar I, A. G.
Production of pulsed magnetic fields in onils cooled to low
temperatures
Zhurnal tekhnicheskoy fiziki, v. 32, no. J, 1962, 441-4.14
TEXT: The problem of the maximum possible strengths pulsed magnetic fields
is considered from the view point,of the mechanical properties of coils
cooled to low temperatures. Two types of coils were investigated: Coil
no. 1: 1230 turns of ';.62 mm copper wire d - 0.6 cm, D/d - 12.5,
1/d = 16i Q300/Q2O - "'!0' When a capacitor bank of 0.1 F and 740 v was
discharged across the voil, a field of 300 koe was produced, lasting
0.05 sec from the start of the pulse up to the field maximum. This field
was accompanied by a scarcely noticeable increase in resistivity at
hydrogen temperature. Coil no. 2: 266 turns of 0.35-mm wire; d - 0.26 cm,
D/d = 7.5, 1/d - 7.5; to increase the strength glass cloth impregnated with
'M'~-4 (BF-4) glue was placed between the wire layers. On the outside the
coil was also wrapped with a few layers of impregnated glass cloth. After
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S/057/62/032/00A,/008/017
Production of pulsed magnetic ... B162/B102
the coil was prepared the glue was polymerized. During the experiments the
coils were immersed in liquid hydrogen. The meahanical stresses in multi-
layer magnetic coils were investigated. The stresses were measured as
dependent on the current passing through the coil. This function is most
sensitive to the central cross-section of the coil. Radial forces proved
to be most dangercus. A formula is given for the maximum mechanical
stresses developing in long single-layer short-impulse coils as well as a
general expression for -the mechanical stresses in the coil. The results of
these calculations and -?xperiments show that to obtain the maximum fielda
it is expedient to design coils with a high ratio of outer external
diameter to the inner D/d and high ratio of the coil lenoth to the inner
diameter (1/d). By using pulsed coils cooled to low temperatures, it is
possible to carry out investigations in strong fields with low consumption
of energy. Glass-.-loth packing makes it possible to use fields of up to
Pd500 koc. There is 1 figure.
ASSOCIATION: Fiziko-tekhnicheskiy institut AN USSR Khartkov (Physico-
tel,.hniaal Institute AS UkrSSR Khar1kov)
SUBM.ITTED: Ma:r 19, 1961
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S/?81/62/0001000/0301036,
AMORS: Bo-_'Ovik-, Ye. S- Lirar A. -G.
TITLr:- Pr-ductiork of pt~L6idmagnetic 3.elds; of long duration
f
..SOURCE: pli=y i j -pro emy.: upraylyayawgo te=,oyadernogo sinteza
dc~-~Lady I konferentrm po f izike pliwny *1 prob~mw upravlyayeraykh
ten.'.-_)yade1mykh :reaktsi~.,...,Fiz.~-tekh. inst. AN Ukr.SSR. Kiev,
Izdv-vo PJI.Ukr.'3SR,:l9.62. 144-148
WerE.' Yneade to determine the increase in the curveent-
city of: coils, wound with'cammcial wire (copper) cooled with liquid
carTyancr capa
hydmg in such a coils the buildup of the r_09
;en, Wheun a pulse is: discharged
netic field is noi lindte~j by. the' resistance and,more enerMy goes into the
fieldl, which can be, made t(':)th more intense and longer. The tests have shown
that the heating corditior~s of. the coil placed in liquid hychogen are nearly
adiaba ic,_ which helps tIxt production of longer pulsed magnvtic fields, but tI.-Lat
not all - the energy stored . in the disczha~e capacitors is utilized, only about
one-thirld going. intco the rkigrzetic.energy and one-half ranaining in the capacitors.
cam

S/781/62/000/000/031/036
AUTHORS - ~~_ik~ __S Busol F01'L (h-ishin S. F.
T.-LTL:-P: investigation of1possibility of obtaining stationarl magnetic fields
L" coils c:)oled with-liquid.hydrogen
SOLRICE Fizika-plazmy probl6my upravlyayemogo ternoyaderry)go sinteza;
doklady I konferentsii po fizik6 Dlazmy i probl~me upxuvlyayemykh
tene)yade=ykh raaktsiy. Fiz.-tek,~. inst. AN Ukr. SSR. Kiev, Izd-vo
1962. 148
AN U)w. SSR,
TEXT: The possibility is'discussed of reducing the energy consumed in the
production of large stationary magnetic fields with the aid of coils made of pure
copper a_nd alum-inun, cooled~with liquid hydrogen., For the I~urest ca-mw-,iai
aluminum the power exi~ited in the cooled coil decreases by aboLt 500 to 1000 times.
T -Lerp allowance for modern liquefaction equipment, is
Ihe overall gain in ei
five-fold. The maximn hext. loads were investigated under different nooling con-
ditions for coils mada. of wpper wire,. the resistance of which is 100 tirnes less
at 20,40K than at roaa temwrature. Passage of liquid hydrogen Vhrough Vne coil
3.nCreases the heat rvnovaf Ipy several times compared with natural convection.
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:T
S/781/62/000/000/0321036
..AUMOIRS: Borovik Y i-'iBusol, rj I. VP As
=,j Yq -Xlovalenko,
TITLE: Investigatibn'of~the possibility, of using a helitn c-ondensation pump
is
for magnetic tv.%
E: F-* zilm:plazny i.problemy upravlyayemogo, termoyadernogro sirteza;
SOUIRC
doklady I )o)nferentsii - po; fiiike pla2my i probleme upravly'ayemykh
ten.1117,raderw7kh re-Atsiy. 'Fiz.-teJ