Posted to News on 29th May 2013, 10:31
Aqueous-based sodium silicate system for EMI/RFI shielding
Master Bond MB600S is an aqueous-based sodium silicate formulated for coating applications where electromagnetic interference/radio frequency interference (EMI/RFI) shielding is required.
The energy emitted from various sources, including radios and appliances, can interfere with other electronic devices. Conductive coatings are often applied to the housings in order to protect the devices from these types of interferences. This silver-grey-coloured system is used in a variety of aerospace and electronic applications.
Tested according to IEEE 299, 2006 methods, MB600S was as effective as the aluminium reference with a range of 95-105dB, from 100MHz to 2GHz. Above 2GHz, the shielding effectiveness of MB600S decreased to 80dB and slightly below. Above 4GHz, the effectiveness was 60-70dB.
As the system is water based, it is relatively non-toxic and easy to handle. It can be brushed or sprayed with the proper equipment. If sprayed, the shielding effectiveness would be even greater than the values given above.
MB600S will cure at room temperature in 24-48h or in 1-2h at 80degC. It features high temperature resistance with a service temperature range of 0degF to 700degF. The compound is available in glass jars, and has a shelf life of 6 months in original, unopened containers at room temperature.
Master Bond MB600S is a silver conductive water-based sodium silicate system for shielding applications that withstands temperatures up to 700 °F. Follow the link to read more about Master Bond's electrically conductive adhesives, sealants, coatings and encapsulation compounds or email [email protected].
