Ceramic Tile 2D Bar Codes
These markings on nominal
10mm x 10mm tiles were done using the teachings of US 6518542. Here a black frit patch is ablatively
removed (negative image) prior to firing
These demo markings are on a ceramic tile
which has been fired to 2150 deg. F . The codes and tiles can be any
size and would be reusable for tracking parts through through chemical
or high temperature processes.
This alumina tag is inserted into a pocket
which presents the affixed tag below the surface plane. It therefore
cannot be scraped off as the block is scraped during processing.

This
alumina tag is designed for long term , high temperature applications.
Click the image to see photo after 24 hours at 2000 deg.F

TRANSFER CODES
One method of applying bar codes directly onto ceramics is to preheat
the ceramic part ( to approximately 175 Deg C) and then pressure transfer
a precut bar code code pattern from a sequential "tape". These codes can survive more than 850 deg C. See the heating
and transfer in a movie which you can download Here