Dymax and Loctite each make a line of 1 and 2 part adhesives for bonding
ferrites.

Dave Fish
----- Original Message -----
From: "Shoda, Steve" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Thursday, March 20, 2003 5:00 PM
Subject: [TN] Adhesive bonding for ferrite cores


> Does anyone have any experience bonding ferrite cores?  I am working on
> developing a process for bonding an e-core to an i-core. They are 0.8" x
> 1.2" and sandwich the winding in the pwb. So the bond must be done once
the
> assembly is populated.   I'm applying a high viscosity epoxy, but it can
be
> difficult to control.  I attempted a 0.002" epoxy preform, but the outcome
> was reduced inductance, so we are still using the high viscosity epoxy.
Why
> would they result in such different inductance properties?   In either
case,
> the cure time at 250°F is 1 hour and production is requesting a material
> which has a very short cycle time.
>
> Steve Shoda
> BAE SYSTEMS Controls
>
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