Engineering Center SZL and LEPCOS
— General representative of Epcos AG by ferrite in the CIS
— Official distributor and general representative for ferrites of TDK Electronics Europe Gmbh in the CIS
— Authorized distributor of Magnetics in Russia, CIS and Baltic countries
— Exclusive distributor of USM in Russia and CIS countries
— Official Distributor Temex Ceramics in Russia and CIS
In recent years due to success in the field of microwave electronics a lot of devices of different applications were produced. The prospects for future development of microwave systems with predetermined characteristics are mainly assigned by ferrite choise. However the choise of a material for a concrete application in microwave technique is a complicated task, as there are different requirements to different parts of microwave band. Among main characteristics of ferrites suitable for high frequencies are:
At the expense of high specific electrical resistivity (ρ >106 Ом·sm) ferrites are characterised by low dielectric losses at high frequencies
tgδ=10-2÷10-4).
Dielectric permittivity ε' (about 10-15)
Thermal stability in a wide temperature range
The high activity is being determined by the value of minimal bias which is essential for required nominal parameters providing.
Saturation magnetization, M s; 4πMs (400-5000 G)
The width of resonance curve 2ΔH is one of the main parameters characterising properties of ferrites applied in high-frequency band.
The yttrium-iron monocrystals exhibit the minimal value 2ΔH =0.3-0.5 Oe. The width of resonanse curve of polycrystalline ferrites varies from 30...40 to 800-1000 Oe.
The technical performance of devices on the base of ferrites mainly depends on operating principle, application, frequency band and power level.
For many years Temex-Ceramics (1971, Bordeaux/France) is one of the world leaders in the field of high frequency materials development and manufacturing. In june 2012
Temex-Ceramics was introduced in Exxelia Group membership. This is a group of companies, supplying electronic parts for different industry fileds. The sales are being realized all over the world by officical distributors in Italy, Eastern Europe, Russia, India, Korea and others.
In 2008 "Lepcos" got a status of Temex-Ceramics official distributor.
Temex-Ceramics Ferrites can be successfully applied in circulators, isolators, phase-shifters, choppers and others.
PDF
Application
Required characteristics
recommendations for materials choosing
Circulators of low power level
Low inserted losses,compactability, a wide frequency band, a wide nominal temperature range, high radiation directivity
The width of ferromagnetic resonance curve (2ΔH; ΔH eff) - minimal values; Dielectric permeability(ε') maximal value; Saturation magnetization (M s ) is determined in accordance with predermined frequency; Temperature coefficient(α) is minimal
Circulators of high power level
The power stability, low inserted lossses , thermal stability
The value characterising the width of spin wave line (ΔH k) must be high
; ΔH eff and ΔH should be close to the the value of ΔH k
Resonance-type isolator (working range - up to resonance)
low inserted losses, narrow -width frequency band
Effective width of resonance curve ΔH eff minimal; M s corresponds to frequency
General characteristics of Temex-Ceramics materials are listed in the table below.
Crystal structure
Temex-Ceramics part number
chemical composition
Recommended frequency band
Thermal stability
Power stability
Magnetic losses
Garnet
Y1xx
Y-Gd
1.55-10.90 GHz
**
*
*
Garnet
Y2xx
CVG
1.55-10.90 GHz
**
*
***
Garnet
Y3xx
Y-Al
0.34-6.20 GHz
*
*
**
Garnet
Y4xxx
Y-Al
1.55-6.20GHz
***
**
**
Гранат
Y7xx
Y-Gd-Al
0.34-6.20 GHz
*
**
*
Garnet
Y9xx
Y-Gd-Al with Co additive
0.34-10.90 GHz
**
***
*
Garnet
Dx
Y-Gd-Al with Dy additive
0.34-10.90 GHz
**
***
*
Spinel
Uxx
Mn-Mg
1.55-36 GHz
*
*
**
Spinel
Axxx
Li
6.20-40 GHz
***
*
***
Spinel
Nxxx
Ni
1.55-40 GHz
***
***
*
* bad; **good; ***excellent
Configurations
Temex-Ceramics ferrites are being produced on the base of pressed powder sintered at high temperatures. After thermal sintering the items can be smoothed and/or polished.
Company produces items with different forms. Dimensional allowance at mechanical treatment is ±0,025 mm. In spite of standard variants of performance it is possible to produce cores in accoradance with sizes and customers drawings.
Standard variants of cores performance
Disk
Diameter: 1-55 mm
Plates
maximal size: 50.8 х 50.8 mm
thickness: 0.5-3 mm
Triangles
Rods
max diameter: 12mm
max length: 90 mm
Composition
Ferrites and dielectric materials
Oredering Code
Configuration
D
Disk
T
Triangle
S
Plate
Dimensional allowance for all configurations are listed below.
Ordering code
Dimensional allowance (mm)
Dimensional allowance (inch)
Z
±0.200
±0.008
Y
±0.150
±0.006
X
±0.100
±0.004
W
±0.050
±0.002
V
±0.025
±0.001
TEMEX-CERAMICS ferrite materials
Тemex-Ceramics manufactures ferrites on the base of compounds with garnet and spinel structures. Yttrium-iron garnets are applied for production of different high-frequency devices operating in low border of high-frequency band. The great interest to ferrites with garnet structure, particularly, to yttrium garnet is explained by narrow line of ferromagnetic resonance absorption. Such materials are also characterised by small magnetic losses; relatively high magnetization; high thermalstability.Often ions of Cobalt and Rare-earth ions (Dy), (Gd) are introduced to materilas structure in order to improve material characteristics for increasing of ferrite stability to Power.
Materials on the base of yttrium iron garnets
Type
4πMs(G)±5%
Тs(°С)±5%
ΔH(Oe)±20%
ΔH eff(Oe)±20%
ΔH k(Oe)±10%
ε '±5%
104tanδ
Detailed information
Heat-resisting with narrow frequency band
Y4091
960
195
35
12
9
15.2
<2
YIG (Iron-Yttrium)
Y10
1790
280
45
4
2
15.3
<2
Y101
1820
280
20
4
2
15.4
<2
Y102
1800
280
30
4
2
15.3
<2
Y-Gd (Ittrium-Gadolinium)
The material can be applied when high thermal stability is required
Y11
1600
280
60
5
3
15.3
<2
Y12
1420
280
65
6
3
15.3
<2
Y13
1250
280
75
8
8
15.3
<2
Y14
1100
280
95
12
9
15.4
<2
Y15
900
280
140
18
11
15.4
<2
Y16
750
280
200
25
15
15.4
<2
CVG (Сalcium-Vanadium)
This materials range was specially developed for application in devices, where low inserted losses are required
Y220
1950
205
10
2
1
15.4
<2
Y218
1850
215
10
-
-
14.8
<2
Y216
1600
218
10
-
-
14.8
<2
Y215
1450
215
10
2
1
14.7
<2
Y212
1200
209
10
2
1
14.5
<2
Y211
1100
205
10
2
1
14.4
<2
Y210
1000
200
10
-
-
14.2
<2
Y209
900
180
10
2
1
14.1
<2
Y208
800
170
10
2
1
14.0
<2
Y-Al (Yttrium- Aluminium)
Due to a wide band of saturation magnetization values such materials can be applied in different high-frequency devices operating at low inserted losses
Y35
1200
225
40
4
2
15.3
<2
Y351
1200
225
22
4
2
14.9
<2
Y34
1030
210
40
4
2
14.8
<2
Y341
1030
210
22
4
2
14.8
<2
Y39
800
195
40
4
2
14.6
<2
Y391
800
195
22
4
2
14.6
<2
Y38
760
190
40
4
2
14.5
<2
Y381
760
190
22
4
2
14.5
<2
Y37
680
180
40
4
2
14.5
<2
Y371
680
180
22
4
2
14.5
<2
Y33
615
175
40
4
2
14.5
<2
Y331
615
175
22
4
2
14.5
<2
Y30
565
160
30
4
2
14.4
<2
Y32
420
135
30
4
2
14.4
<2
Y31
370
125
30
4
2
14.1
<2
Y36
290
115
25
4
2
14.1
<2
Y302
240
100
30
4
2
14.1
<2
Y-Gd-Al (Yttrium-Gadolinium- Aluminium)
The special feature of these materials is high thermal stability. They are suitable for application in devices of middle power level.
Y71
1020
235
60
7
5
15
<2
Y710
1020
240
75
9
7
15
<2
Y77
950
230
60
6
5
14.9
<2
Y780
830
235
60
6
5.5
14.8
<2
Y78
800
220
80
8
8
15
<2
Y708
800
260
140
15
15
15.2
<2
Y74
670
190
60
6
6
14.9
<2
Y72
540
175
60
6
6
14.6
<2
Y705
470
170
65
6
6
14.3
<2
Y75
400
160
65
6
6
14.3
<2
Y76
390
150
50
6
6
14.2
<2
Y-Gd-Al Co or Dy(Yttrium-Gadolinium-Aluminium with Co and Dy additives)
Materials are suitable for application in devices of high power level. These materials are characterised by good thermal stability.
Y918
1760
280
85
12
20
15
<2
Y91
1020
240
60
17
14
15.1
<2
Y86
830
270
95
34
25
15.4
<2
Y94
780
250
75
14
23
15.2
<2
Y908
780
250
85
14
29
15.2
<2
Y9081
780
250
120
14
35
15.2
<2
Fe-Y + Dy additives ( yttrium iron garnet with Dy additives)
Materials are suitable for application in devices with high power level and are characterised by increased thermal stability
D1
1400
270
110
34
16
15.5
<2
D5
1070
270
150
36
23
15.5
<2
D2
900
270
185
25
24
15.5
<2
D3
590
175
85
16
19
14.5
<2
D4
580
170
140
34
33
14.4
<2
Ferrite materials on the base of Mg spinel are characterised
by small values of coercive field strength and also by low magnetic and dielectric losses that allows to use them in fields far from resonance area. cocernintg devices operating nerby resonance area the great is interest is attracted to materials on the base of Ni spinel. Such ferrites are characterised by a wide range of magnetization and high thermal stability. Ferrites on the base of Li spinel can be used in discrete phase shifters.
Small values of coercive field strength and thermal stability in operating temperature range and a wide range of saturation magnetization values are characteristic for such materials.
Materials on the base od compunds with spinel structure
Type
4πMs(G)±5%
Тs(°С)±5%
ΔH(Oe)±20%
ΔH eff(Oe)±20%
ΔH k(oe)±10%
ε '±5%
104tanδ
Detailed information
Mn-Mg
Suitable for application in devices with low
magnetic and dielectric losses.
U21
2400
275
290
6
4
13
<3
U20
2100
300
360
6
4
13
<3
U19
1900
280
350
6
4
13
<3
U33
1600
230
290
6
4
12.4
<3
Li (Lithium-Titanium-Zink)
These materials are used when manufacturing thermallly stable components operating in S-band. Ferrites А370 and А230 can be used in power electronics
A50
5000
450
170
4
3
15.3
<5
A500
4900
450
200
9
10
15.3
<5
A37
3700
565
400
4
3
16
<5
A370
3700
565
400
4
3
16
<5
A30
3000
555
450
4
3
16.4
<5
A28
2800
540
450
4
3
16.6
<5
A24
2450
390
250
4
3
16.8
<5
A23
2300
505
450
4
3
16.8
<5
A230
2300
505
450
9
8
16.7
<5
NORTH-WESTERN LABORATORY: NEWS
09.10 19
LEPCOS invites you to attend the Stand C23 at ChipEXPO 2019 exhibition, which will be held from 16 to 18 October 2019 in Moscow in the Expocentre, in the pavilion "Forum".
26.06 19
According to the results of 2018 Lepcos has received "best ferrites seller 2018" seal of excellence from TDK company.
18.04 19
Dear colleagues! We would like to draw your attention to the fact that, since December 2018, the package content of electrolytic capacitors has been changed.
Contacts
196084, Russia, St. Petersburg
Varshavskaya str. 5A.
Paper mail: 196128, Russia, St. Petersburg, p.o. box 63 All contacts
In recent years due to success in the field of microwave electronics a lot of devices of different applications were produced. The prospects for future development of microwave systems with predetermined characteristics are mainly assigned by ferrite choise. However the choise of a material for a concrete application in microwave technique is a complicated task, as there are different requirements to different parts of microwave band. Among main characteristics of ferrites suitable for high frequencies are: 
Тemex-Ceramics manufactures ferrites on the base of compounds with garnet and spinel structures. Yttrium-iron garnets are applied for production of different high-frequency devices operating in low border of high-frequency band. The great interest to ferrites with garnet structure, particularly, to yttrium garnet is explained by narrow line of ferromagnetic resonance absorption. Such materials are also characterised by small magnetic losses; relatively high magnetization; high thermalstability.Often ions of Cobalt and Rare-earth ions (Dy), (Gd) are introduced to materilas structure in order to improve material characteristics for increasing of ferrite stability to Power.
