Ceramic Breaks

Ceramic Breaks/Isolators

Looking for ceramic breaks for
high temperature/ cryogenic environments?

Ceramic Breaks, sometimes referred to as "Electrical Isolators" or "Envelopes",
consist of metal sleeves brazed to each end of an insulating ceramic tube.
Ceramic Breaks are commonly used to introduce fluid/gas into a system and to provide electrical isolation of line components.

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For those searching for a high level of airtightness and insulation capability

Features

  • Designed and rated for high and ultra-high vacuum applications
  • Standard-Type available in tube sizes 8mm and 12mm.
  • Optimal structure design for gas/liquid introduction applications
  • Small-quantity customization is available.

Ceramic breaks/ Isolators consist of metal sleeves brazed to each end of an insulating ceramic tube.
It can be best used in an environment with high/ low temperature, and/ or with high requirements for corrosion-resistant.

Synchrotron radiation facilities

Photo provided by RIKEN

In the field of "Nano Science", our Ceramic Breaks (Liquid Type) are used as an integral part of the cooling equipment of Multipole Vending Electromagnest within Synchrotron radiation facilities in Japan.

Synchrotron radiation facilitiesSynchrotron radiation facilities
Ceramic Breaks For Liquid

High Resistance to Leakage and Corrosion :
Specially designed for liquid applications.

Our Ceramic Breaks(liquid type) are specially designed for the transmission of liquids.
The inside structure is smooth, which can effectively prevent the liquid from staying inside even when the flow stops. (As the Image below)

The varying thermal expansion of different materials can cause cracks on the surface of ceramics. To prevent the ceramic parts from cracking, many companies will leave a gap on the joint part to relax the thermal stress.
Instead of leaving a gap on the joint, we created a less susceptible design to thermal stress, and our special brazing technology allows our product to be excellent in corrosion resistance to pure water.

Ceramic Breaks For Gas

Ceramic Breaks For Gas (Straight)

Ceramic Breaks For Liquid

Ceramic Breaks For Liquid

Specially designed for the transmission of water and/or coolant fluids

Kawaso Texcel’s metallizing technology is excellent in corrosion resistance to pure water.

Evaluation test on pure water compatibility

Material
Ceramics that are metalized and brazed with Ni-plated metal fittings

Test Condition
pure water at 100°C for 200 hours

Result
Metal elution is not observed on the joint parts.

Content Level (mg/L)
CU Ag Ni Fe Ti
0.2 under 0.05 under 0.05 under 0.05 under 0.05

Use

  • Piping for cooling electromagnets in large-scale accelerators
  • Piping for delivering liquid helium

Standard Product

Feature

Insulation resistance(MΩ): over 1,000 (at DC500V), Airtightness: 1×10-10Pa·m³/sec

1,500 Volts
Ceramic Breaks For Liquid
Catalog Number Joint material Volts Size (mm) Drawing
φD1 L
CB-L-S1500V-8 SUS316L 1.5kV 8.0 140 PDF
CB-L-S1500V-12 12.0 PDF

* Contact us for the changing union to inch/mm

Ceramic Breaks For Gas (Straight)

Excellent in airtightness & Corrosion Resistance

Our ceramic breaks can keep high airtightness, even in high temperature/ cryogenic environments.
Also, it is highly corrosion-resistant and is suitable for applications like gas delivery.

Use

  • Gas tube for film deposition apparatus
  • Gas tube for fuel battery
  • Gas tube for cooling apparatus

Standard Product

Feature

Insulation resistance(MΩ): over 1,000 (at DC500V), Airtightness: 1×10-10Pa·m³/sec

1,500 Volts
Ceramic Breaks For Gas (Straight)
Catalog Number Joint material Volts Size (mm) Drawing
φD1 L
CB-G-S1500V-8 SUS316 1.5kV 8.0 140 PDF
CB-G-S1500V-12 12.0 PDF

* Contact us for the changing union to inch/mm

Ceramic Vacuum Breaks/Isolators (Spiral/Helical Type)

Ceramic Breaks For Gas (Spiral)

Image of Inner Flow Channel

Image of Flow Channel

Cross Section

Cross Section

Designed for Suppression of Discharge in a vacuum chamber/thruster

  • Can be used as a vacuum gas feedthrough for delivering gases to vacuum systems.
  • Has a helical-shaped inner flow Channel inside the ceramic part, which makes it possible to suppress the occurrence of linear discharges.
  • The insulation distance can be increased 2~3 times than straight-shaped ceramic breaks/ isolators of the same length.
  • Can be safely used for radiofrequency sputtering (RF sputtering).

Features

  • Provides electrical insulation when delivering gas into a vacuum system.
  • Suppress the occurrence of discharge by increasing the insulation distance of the gas flow path inside.
  • Has been used in:
    • Etching/Film Deposition Apparatus
    • CVD/Sputtering System
    • Thruster

Standard Type

Feature

  • Air Tightness: 1.0×10-10Pa·m³/sec
  • Length of the inside helical: 190mm

Standard Ceramic Breaks For Gas (Spiral/Helical Type)

Standard Ceramic Breaks For Gas (Spiral/Helical Type)

Size (mm)

L ΦD1 ΦD2 ΦD3 Drawing
70 Φ20 Φ1/8inch Φ1.74 PDF
90 Φ20 Φ1/4inch Φ4.35 PDF

* The length of the inside helical is about 190mm.
* Please feel free to contact us about the material/size customizing.
* The standard type will be shipped in 2 weeks after your order normally.

Customized Type

If the standard type does not fit, we also provide customization service.
We will create a design to meet your requirements.
Please check the applicable size below.


Material of Tube: SUS304/316
Applicable Size (mm)
φD1 L1 L2
φ10~ 35~ 7~
Customized Ceramic Breaks

We design and produce suitable ceramic breaks for your apparatus and equipment.

  • By adjusting the shape/material of metal fittings and ceramics, we design the ceramic breaks based on your operating environment and application.
  • We can coordinate your requests to change the shape and size of your ceramic breaks to tailor them to your needs.
    (extending the creepage distance/provision measures against electrostatic discharge/...)
  • For the alumina ceramics is In-House made, you can also choose the purity of alumina (92%, 96%, 99%).

Materials

For customized Ceramic Breaks

It is possible to change the material and the shape of fittings(caps/pipes).

Customized Ceramic Breaks
Cap Kovar C1020 Ti Ni A1070 A3003
Pipe C1020 / Ti / SUS316 / SUS316L A1070 A3003

Joint of Aluminium and Alumina

Aluminium and Alumina

Joining aluminum and alumina ceramics is difficult, because of the gap of thermal expansion of the two materials.
However, our special brazing technology enables the bonding of aluminum and alumina ceramics by developing our unique brazing alloy, by which the airtightness can also be guaranteed.

Shape and Size

Customized

MAX dimension 400mm

Customized

MAX diameter 400mm

Customized

Metallized & Brazed Product

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