SGJ Electrical isolators be made of Alumina Ceramic, Kovar, SUS
304, OFHC CopperVacuum Insulators so called vacuum breaks and
isolators. They are used to electrically isolate one component or
system from another. SGJ use 96% ceramic insulator, which is vacuum
brazed to two Kovar sleeves, getting a UHV compatible insulator.
Then welded them to the appropriate vacuum flanges or
body. Model: Electric-Isolators & Adapter: SUS 304 & Sleeve:
Kovar 4J33 & Insulator: 96% Alumina Electrical isolators,
consist of metal sleeves brazed to each end of an insulating
ceramic tube. They are used to introduce cryogenic fluids into a
system and to provide electrical isolation of line components.
Vacuum isolators are used to provide an electrical break between
the vacuum system and other external components. SGJ isolators
typically are made from high-purity alumina ceramics and Metals.
The metal hardware is generally a controlled-expansion Kovar 4J33,
SUS 304 or OFHC Copper TU1. All materials and braze alloys used are
chosen for their specific characteristics and ability to maintain
the integrity of the seals for use in demanding applications and
environments. The assemblies are brazed together with Silver Copper
Eutectic Alloy.Designed Electrical isolator by
SGJ-International (Shaanxi Sgj International Co.,
Ltd.)CodePartsMaterialsNoteACap/SleeveSS 304JIS Code
KV-4(Ni33Co17)BCeramic Tube96% aluminaEnds metalizing thin layer
of MolybdenumCSS AdapterSS 304 Stainless Steel 304
Coated with NickelXBrazing AreaSilver+Copper Eutectic AlloyComplete
vacuum brazingKovar Alloy 4J33:Kovar is a Nickel-Iron-Cobalt,
controlled expansion alloy. It's expansion characteristics match
alumina ceramics. This alone ensures it is a highly popular
controlled expansion alloys for hermetic sealing applications
(Mainly used in Ceramic Metal Seal Assemblies)OFHC Copper
TU1:CTU1/C102 is an oxygen-free copper which has better forming,
resistance to hydrogen embrittlement, and brazing characteristics
than C110 ETP. CTU1/C102 has good solderability and corrosion
resistance and is used for high current applications.Stainless
Steel SUS 304L:SUS 304L Stainless Steel famous for its
resistivity, fall under the category of Stainless Steel Tubes.
Threaded, Hot Rolled, Cold Rolled, Heat Exchangers, Annealed,
Pickled.... All these products belonging to the SUS 304L
Tubes catalog serve as the prime building blocks of
electrochemical, shipping, construction and gas
industries.Metallized Alumina Ceramic:Vacuum brazing of ceramic and
metal requires metal coating in the welding area of ceramic. It
ensures good air tightness of metal and alumina metallized ceramic
brazing joint in vacuum environment. We SGJ have our own unique
patented solder formula to ensure the stability and reliability of
our products... The key of Ceramic-Metal structure based on
the vacuum tightness, so called sealing. And , Metallized ceramic
bonding area Via vacuum brazing technology is the only
solution.Alumina Manufacturing Description:Alumina Ceramics
can be produced in a wide range of purities with additives designed
to enhance its properties. Typical purities range from 85 to 99.7%
although Precision Ceramics generally work over 99.7% material.It
can be injection molded, die pressed, isostatically pressed, slip
cast and extruded. Once fired and sintered, it can only be machined
using diamondgrinding methods but prior to sintering advanced green
and biscuit machining techniques developed by Precision Ceramics
allow more complex components to be manufactured using traditional
machining methods. In addition Alumina can be readily joined to
metals or other ceramics using metallising and brazing
techniques.Alumina can be machined in green, biscuit, or fully
dense states. While in the green or biscuit form it can be machined
relatively easily into complex geometries. However, the sintering
process that is required to fully densify the material causes the
alumiuna body to shrink approximately 20%. This shrinkage means
that it is impossible to hold very tight tolerances when machining
alumina pre-sintering. In order to achieve very tight tolerances,
fully sintered material must be machined/ground with diamond tools.
In this process a very precise diamond coated tool/wheel is used to
abrade away the material until the desired form is created. Due to
the inherit toughness and hardness of the material, this can be a
time consuming and costly process.Precision Ceramics specialises in
tight tolerance, highly complex work and has extensive in-house
machining facilities - including 4th & 5th axis machining centres,
drilling, grinding, milling, polishing, sawing, tapping, threading
and turning - to enable us to manufacture Alumina components to the
highest specifications.Precision Ceramics is your Alumina machining
specialist for your technical ceramic prototyping & manufacturing
needs; we are always happy to use our many years of advanced
ceramics experience to provide advice on materials, design, and app
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