VTC in the Czech Republic
specialises in vacuum technology components 
ceramics, flanges, special parts, 
brazing, welding, plating, metalizing
VACUUM TECHNOLOGY will introduce innovations to you.



Vacuum is space that is devoid of matter. The word stems from the Latin adjective vacuus for "vacant" or "void". 

An approximation to such vacuum is a region with a gaseouspressure much less than atmospheric pressure. Physicists often discuss ideal test results that would occur in a perfect vacuum, which they sometimes simply call "vacuum" or free space, and use the term partial vacuum to refer to an actual imperfect vacuum as one might have in a laboratory or in space. The Latin term in vacuo is used to describe an object as being in what would otherwise be a vacuum.



has been part of Alumina Redwitz Holding
Our business unit LIKE creates innovations for you.






In vacuum technology, completely vacuum-tight seals are vital, coupled to the excellent  insulation offered by ceramics and high level of dielectric strength. LAPP Insulators Alumina offers a wide-ranging programme of standard vacuum feedthroughs to match your needs, whether that be controlling, measuring or directing energy. Alumina draws on long years of experience and high levels of know-how in this field. We are your most reliable partner for your special applications and requirements too – guaranteeing our customers quality, reproducibility and satisfaction.


Product capabilities

Alumina Systems offers a variety of conductive materials for the manufacture of vacuum feedthroughs such as non-magnetic copper (OFHC) or nickel. Feedthroughs are capable of working at temperatures of between -150°C and +450°C. By using high temperature braze, even higher operating temperatures of over 600°C can be achieved. Surface resistance of the glazed ceramic surface measured against a 5kV DC voltage exceeds 1x1012 ohms. Vacuum feedthroughs from Alumina are routinely tested to leak rates of 10-8 mbarL/s. On application we can test to 10-9 mbarL/s. The components’ electrical properties such as maximum voltage and current loading are measured in air; so considerably higher values apply under vacuum. Vacuum technology has been another application for FEM analysis at Alumina since 2013. This computer-aided design analysis offers our customers made-to-measure, intelligent solutions. The decisive advantage lies in reduced development times for the absolute optimum design at considerably lower cost, even at the prototype phase. Alumina develops components hand-in-glove with customers to series production launch, drawing on the considerable expertise of their in-house research and development department, “LIKE



Alongside standardised component ranges Alumina produces alternative solutions in ceramic-to-metal, carefully matched to individual customer concepts. To minimise the development period for new ceramic-to-metal components Alumina utilises the Finite Element Analysis development tool (FEM for short) to support new product design. Specially for the design of ceramic components, we have a state-of-the-art component break statistical predictive tool. This is capable of rapidly comparing component design variants so that the most robust mechanical design can be chosen before moving to the prototype build stage. Prototype quantities are minimised, resulting in cost savings and project development periods reduced by several weeks. In contrast, simulation testing requires one to two weeks.


Alumina develops components in tandem with their customers to series manufacture. We are also pleased to consider commissions from third parties. The costs for a simulation typically lie well below those of tooling for samples. Static and transient thermodynamic calculations are applied, while Alumina can draw on the resources of the group research team "LIKE" for magneto-electrical calculations.




E-shop for you.

As specialists in technical ceramics we supply a variety of standard and custom made solutions ranging from sintered alumina rings for vacuum, vacuum-tight joints, brazed insulators, bushings, metallised ceramic parts, to housings for power semiconductors, etc.

Please challenge us with your design and we will find a suitable solution. 



NEW WEBSITE: https://technickakeramika.cz/en/

18/06/2021 12:41
You are welcome to visit our website at www.technickakeramika.cz/en and fill in a pre-defined RFQ by hitting https://technickakeramika.cz/en/kontakt/...
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600mm long Insulator with CF flanges

22/05/2019 09:53
New insulator has been produced in our company. Ceramic - Al2O3 99% Flanges - Kovar Hermiticity of sealing < 10-3 (Pa x cm3) /...
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Insulator 4019 - 60kV, Flange NW63CF

22/02/2019 12:36
Insulator 4019 - 60kV, ConFlat Voltage DC:                       >60kV Tube:...
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04/12/2018 00:00
PRAGOVAC 2018 - 14.11.2018 We had a booth at Pragovac and were given an opportunity to present ourselves before the visitors in a short speech. Many...
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VACUUM EXPO 2018 in Coventry (UK)

20/10/2018 14:51
On 10.10.2018 we visited Vacuum Expo in Coventry. We were pleased to to present our solutions at our Alumina Systems booth. This year for the...
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457401860CF - 60 kv

21/09/2018 13:28
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!!!New subcategory of insulators!!! Water/Liquid break

26/06/2018 13:24
Water/Liquid break Provide electrical insulation for water or LN2 cooling lines (depending on break type). Available in 1/8", 1/4", and 3/8" tube...
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Vacuum products for new customers of 2018

25/06/2018 13:31
We are specialized in metal to ceramic tight joints and technical ceramic for various applications. Please, send your RFQs by...
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Special feedthrough available in stock

18/05/2018 13:32
SK 280 10 Feedthough HT - 1,25´´ Conductor:                       ...
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Vacuum Feedthrough 100kV

20/03/2018 12:20
Read more: www.vacuumtechnology.cz/products/a6010100cf-100kv/ www.vacuumtechnology.cz/products/a6010100w-100kv/
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