REVIEW OF HIGH-FREQUENCY INORGANIC DIELECTRICS

• Document Type: CREST
• Collection: General CIA Records
• Document Number (FOIA) /ESDN (CREST): CIA-RDP80-00809A000600290922-6
• Release Decision: RIPPUB
• Original Classification: C
• Document Page Count: 3
• Document Creation Date: December 22, 2016
• Document Release Date: September 29, 2011
• Sequence Number: 922
• Publication Date: April 3, 1950
• Content Type: REPORT

Sanitized Copy Approved for Release 2011/09/29: CIA-RDP80-00809A000600290922-6
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CENTRAL INTELLIGENCE AGEfV e'r ! 7::,i!NREPORII
INFORMATION FROM
FOREIGN DOCUMENTS OR RADIO BROADCASTS CD NO.
COUNTRY USSR
SUBJECT Scientific - Dielectrics
HOW
PUBLISHED Monthly periodical
WHERE
PUBLISHED Moscow
DATE
PUBLISHED Nov 1949
LANGUAGE Russian
TMU DOCU MUTT CONTAIN OITORMAT ON ATTCCTIMO TM[ MRIUN4111112/
Or MC UNITIO STAIRS ?ITMIN t.C ...IMO OF I lIOMUI
M. S. C.. SI AND SS. AS AMMORO. ITS TRANSMISSION OR MY RST .A 1CT SO
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OS Ib CONTMTS IN ANY MMNM TO AN ONAUrMORISSO SSRSOM IS RRO?
NIO - OT LAM. RVROOYCTIO. OS TINA SOM IS RROMIOOSO.
DATE OF
INFORMATION 1948
DATE DISTT Apr 1950
NO. OF PAGES 3
SUPPLEMENT TO
REPORT NO.
THIS IS UNEVALUATED INFORMATION
RR r11E 0 IIlIG^n-FRE UajCi INORGANIC DIELECTRICS"
Ith. S. Valeyev
State Research Nlectroceramic Institute
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(High-Frequency Inorganic Dielectrics, by Professor N. P.
Bogoroditskiy, Doctor of Technical Sciences and Stalin Prize Lau-
reate dna'I.'D: Fridberg, CandilAte of Technical Sciences, pub-
lished by "Soviet Radio" 1948, 338 pages, 21 rubles)
This volume is of great value as it systematizes a large amount of materi-
al on high-frequency dielectrics. The authors have played a prominent part in
producing and investigating the inorganic -- mainly ceramic -- insulating materi-
alsregaired by industry.
Modern ceramics intended for high-frequency installations have become so
differentiated in theit electrophysical and physicomechanical features that it
has become impossible to use them properly without a special study of their prop-
erties. Since the book is.written by highly qualified specialists who have cre-
ated many ceramic materials under the present-day policy of wide-scale develop-
ment and introduction of high-frequency ceramic materials into industry, it is of
great interest to plant workers who produce and use ceramic materials, as well as
to students and technicians studying insulating technology.
The main body of the book is an original monograph on the fundamentals of di-
electric physics and technology, and consists of data obtained by the authors while
studying a number of important high-frequency insulation problems.
The book is divided into four parts. The first part, consisting of 12 chap-
ters, is devoted to the main physical properties of dielectrics and covers dielec-
tric constants, conductivity, dielectric losses, heat and electrical breakdown of
dielectrics, air breakdown and discharge over the surface of dielectrics, volume
and surface hygroscopy, and the mechanical strength of commercial dielectrics.
CLASSIFICATION
NSRB
DISTRIBUTION
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The second part is devoted to the electrical properties and structure of
dielectrics and consists of an introduction and two chapters. Dielectric losses
and the structure of polycrystalline dielectrics and inorganic glasses are ex-
amined.
The third part is devoted to the properties and technology of inorganic
dielectrics. This part, which comprises six chapters, is more than one third
of the total volume of the book. It examines ceramic dielectrics, methods of
manufacturing ceramic parts, methods of attaching metallic reinforcement to
ceramic parts, inorganic glasses, micalex, materials of secondary importance,
and monocrystalline dielectrics.
The fourth part is devoted to the use of ceramics in high-frequency ap-
paratus. Installation parts, inductance coils, high-frequency condensers,
and wire-less resistances are examined.
The appendix lists the principle tests for high-frequency dielectrics and
contains a small bibliography.
The authors thus cover all the main problems connected with the physics
and technology of the process of producing ceramic materials and parts. Con-
sequently, many important problems in the physics and technology of other in-
organic dielectrics receive a very sketchy treatment. Moreover, the book
contains some inaccurate suatements.
In the chapter devoted to dielectric constants, in addition to the equa-
tions of Clausius-Mosotti and Born which are listed, a detailed account should bave
been given of the more accurate equations of G. I. Skanavi, which have been ex-
tensively treated in USSR and foreign periodicals.
Chapters IV, V and VI, devoted to the breakdown of dielectrics could have
been combined into one, putting the emphasis on the breakdown of inorganic di-
electrics. The graphical method of calculating thermal breakdown and the ex-
amination of surface discharge along insulators under various conditions of
moisture and frequency of the applied field is of great practical interest.
The chapters devoted to volume and surface hygroscopy are also of very great
interest. However, more detailed account of the procedure for determining the
moisture stability of ceramic materials would have been desirable.
In the chapter on dielectric constants it would have been well to supply
a key to the symbols given to the coefficients of dielectric polarization. As
it is, confusion may arise when this section is read.
It should have been pointed out that the formula for calculating TK ? of
mixtures can be used only when there is no chemical reaction between the com-
ponents. Mention should alto have been made of the fact that in approximate
calculations of e and TK E for ceramic materials, it is necessary to allow
for the glass phase and the closed air pores which are always to be found in
ceramic materials, as well as for the crystalline phases of the individual
components.
The electrical properties and structure of dielectrics are examined in
the second part of the book. It is impossible in a small space (15 pages in
all) to cover all the problems concerning the electrical properties of di-
electrics in relationship to their structure. The authors have, therefore,
described only particular electrical properties (tan S and P ) and the struc-
ture of some crystals and glasses. The role of crystalline phases, vitreous
layers and impurities, etc., is also examined in general terms. However, even
in a brief exposition, the types of bonds in solids (ionic, #omeopolar, metal-
lic and van der Waal) should have been treated on the basisy.f concrete examples.
In examining the energy of a crystal lattice, the formulae of A. Ye. Fersman
and A. F. Kapustinskiy should have been included as well as Born',s.
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The third part gives a detailed account of the classification of ceramic
materials according to purpose, the classification of materials according to
type of raw material, their fields of application, properties, and prospects
of using other materials.
In the chapter on methods of manufacturing ceramic parts, the sections deal-
ing with their classification by technological features, the methods of manu-
facturing the parts in relation to their purpose, and especially the guide to the
design of ceramic parts, Table 13, are of great interest.
The chapter which explains methods of attaching metal reinforcements to
ceramic parts is also very valuable. It discusses the mechanical method of at-
tachment, securing the metal to the ceramic by means of cement, vacuum-tight
joining of ceramic and metal by brazing, and joining ceramic to metal with glass.
Here, use is made of the authors' wealth of experience in the production of various
high-quality radio parts.
The paramount defect in the third part of the book is the paucity of informa-
tion on steatite materials. References to insulating porcelain and certain other
materials which are not high-frequency dielectrics could have been omitted.
The profusion of illustrative material (Figures 86-92, 93, 107-109 1Y 17'
135-136, etc.)which is not connected with the properties or manufacture of the parts
clutters up the book.
The authors' assertion that the casting method is applicable only to the manu-
factu e of large ports when high dimensional accuracy is not required, appears to
be made without sufficient foundation. The use of special casting methods enables
small ceramic parts to be manufactured with a high degree of dimensional accuracy
without additional mechanical treatment.
The authors pay insufficient attention to the kilning of ceramic materials
and the types of furnace used for this purpose.
The fourth part of the book, which is devoted to the use of ceramics in high-
frequency apparatus, gives a detailed account of various installation parts, con-
densers, induction coils, and wireless resistors together with the necessary tables
and sketches. Based on the parameters of the ceramics used,'the condenser calcu-
lations by one of the authors are of considerable interest. The chapter on wire-
less resistors is too brief (less than 3 pages) and in such a form that it hardly
satisfies the requirements of a handbook. It would have been very useful to in-
clude a section explaining the form and methods of preparing specimens of ceram-
ic materials for determining their electrophysical and physicomechanical proper-
ties. The parameters of ceramic materials change considerably, depending on the
shape, size, and preparation of the specimen, as a result o? which incompatible
results are frequently obtained for the same material.
The book contains printing errors, in addition to those listed,which should
be corrected in the next edition.
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