Specifications:
-High purity alumina ceramics-95-96% alumina.
-Metallization-Mo/Mn metallized with Nickel plating.
-Customised sizes and metallisation patterns available.
Features:
| Shape | As per request. Mostly are using ring shape |
| Size | Big ring OD30.5*ID24.2*3.20mm
Small ring OD30.5*ID27.5*1.06mm Or custom by your drawing |
| Color | White |
| Properties | l Ultra-high vacuum compatibility (10-8 to 10-9 mbar.l/s)
l Good dielectric strength (13KV/mm in AC and 42KV/mm in DC) |
Four ceramic rings are using in one image intensifier tubes.
Each metalized ceramic ring serves not only as a part of the electrode conductive path, but also as a mechanical positioning and vacuum holding function. The rings are often precisely bonded through brazing or metal support structures to form a cylindrical main structure.
Functional:
Realize electrode cascade and electric field distribution:
Supporting components such as photocathodes,MCPs, and phosphorescent screens;
Maintain vacuum packaging and mechanical stability.
Applications:
-Heead-mouted night vision
-Spetrometers
-Medical imaging device
-Surveillance cameras
Innovacera are specialized in metallized ceramics for more than 13years.
Our advantages:
-Exsiting samples for testing
-Rich experience in metallized ceramics
-Customised soluttions.
Declaration: This is an original article of INNOVACERA®. Please indicate the source link when reprinting: https://www.innovacera.com/product/metallised-ceramic-rings-for-image-intensifier-tubes
Frequently Asked Questions
Why Are Metallized Ceramic Rings Critical for Image Intensifier Tubes? How Do They Maintain Ultra-High Vacuum?
In night vision image intensifier tubes (IIT), any minute vacuum leak or electrical arc instantly destroys the photocathode and microchannel plate (MCP). INNOVACERA’s 95-96% alumina ceramic rings utilize Mo/Mn metallization with electrolytic nickel plating to guarantee hermetic brazing with leak rates as low as 10^-8 to 10^-9 mbar·l/s. With exceptional dielectric breakdown strength (42 KV/mm DC and 13 KV/mm AC), they reliably isolate cascading electrode voltages while providing rigid mechanical positioning under extreme tactical vibrations.
Need Precise Electrode Stack Spacers for Electro-Optics? How to Order Custom Metallized Rings from INNOVACERA?
A standard IIT tube assembly typically integrates four matched ceramic rings to support the photocathode, MCP, and phosphor screen. In addition to common dimensions (such as OD30.5 x ID24.2 x 3.20 mm and OD30.5 x ID27.5 x 1.06 mm), INNOVACERA can custom ring diameters, step grooves, metallization bands, and nickel thicknesses according to your engineering drawings. Testing samples and brazing compatibility consultations are readily available.
