Reuterweg 65 D-60323 Frankfurt/M Tel +49 (0)69-720040 Fax +49 (0)69-720400 info@tectra.de
 

Ceramic Components for vacuum applications


 
  • Ceramic Beads (Gelenkperlen)


Ceramic beads can be used to insulate wires for vacuum applications and where higher temperatures are used. Due to the convex and concave shape of the endings the beads allow good insulation integrity even at bent wires.
 
 

ceramic beads as wire insulation






These ceramic beads are offered in Alumina (Al2O3) and in Steatite. Alumina is preferable for UHV and Steatite for up to high vacuum. Beads are offered in 3 sizes and delivered in packages for 30cm insulation length. For bigger quantities special arrangements can be made.
 


dimensions Al2O3 beads, Steatite beads


 
d D L
GP1.4-S/A * 1,4 2,8 2,8
GP2.3-S/A * 2,3 5,1 5,1
GP3.1-S/A * 3,1 8,4 8,4
* GPx.x-S for Steatite; GPx.x-A for Al2O3
standard packages for 30cm insulation length

  •  Split Bushes (Buchse-Gegenbuchse)  


Ceramic split bushes are used for electrical and/or thermal insulation of screw joints, filaments, heaters or sample plates. See below application example showing how the screw head, thread and nut are completely insulated from a support plate. 


application example for split bushes


 
 


The split bushes are of Alumina (Al2O3) for the sizes of M2 and M3 threads and Steatite for M5 threads.

ceramic split bushes (Buchse-/Gegenbuchse)Buchse/Gegenbuchse aus Keramik
 
 

Dimensions (mm)


 
 

Split Bush H H' A B C h h' a b c
M2 3,3 2,3 2,4 3,9 5,9 3,5 1 2,4 4,4 5,9
M3 4,0 2,8 3,4 5,4 7,4 4,0 1 3,4 5,9 7,4
dimensions in mm

 
 

Dimensions of M5 Split Bus -> see here





 
  • Ceramic Washers (Keramik Unterlegscheiben)  


Ceramic washers are offered for M2 and M3 screws. The material is Alumina (Al2O3).




Alumina washers (Keramik Unterlegscheiben)


 
 
 
 
 
 
ID
OD
Thickness
M2
2,1
4,5
1
M3
3,1
6
1
dimensions in mm
 
 
 
 

  • Ceramic Screws and Nuts (Keramik Schrauben und Muttern)  
Alumina screws are offered in M2x5, M3x10 and M4x10 with nuts. Screws and nuts with hex heads. Other dimensions are available on request.
  • non-magnetic  
  • outstanding electrical isolation   
  • excellent under high temperature   
  • Alumina material used   


ceramic bolts and nuts, M2x5, M3x10 and M4x10
Standard packages contain each 4 screws and nuts
 
 
 

Specification:


 
Composition
>99,7%
Density gm/cc
3,8
Porosity %
0
Hardness GPa (Knoop)
11,1
Colour
ivory
Modulus of rupture
(4 point bend test) MPa
330
max. use temp °C
1.650
Therm. expansion coeff
x 10-6/°C.
7,5
Therm. conductivity
W/m°K
35
   
Strength*:
 
destructive torque (Nm)
M3
M4
 

0,27
0,83
tensile strength (MPa)
M3
M4
 

30
48

* guide-line data, not a specification


 
 

Ceramic Tubes

data to follow soon. 



Quick links to other major tectra products:

Electron Beam Evaporator - 4-pocket e-beam evaporator - Plasma Source - Atomic Hydrogen SourceSputter Gun - Mini-Coater Deposition System - Sputter-Coater


   
  contact : Dipl.-Ing. Andreas Gati
tectra GmbH, Reuterweg 65,  D-60323 Frankfurt/M
phone: Germany (0) 69 - 72 00 40
fax: Germany (0) 69 - 72 04 00
email: mailto:info@tectra.de
home: http://www.tectra.de/
  last update: 27.05.2006
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