Cyanoacrylate on Ferrite

Blowtorch + molten glass?

D from BC wrote in news: snipped-for-privacy@4ax.com:

if you want better CA glues,go to a hobby shop and get the kits they use. they have IRC,3 different viscosity CA glues,and they also have accellerator for the CA to make it bond faster.

Porosity? Ferrite?

Superglue

I used to do it years ago, seems to have worked fine. Depends on the application I suppose. We did it with pot cores. A great big glob of hot melt might help too. Worst case, you can always use acetone to dissolve the CA if you want to start over.

Uncoated. iirc.. I saw a microscope picture showing the surface roughness of ferrite core material.. And perhaps I read some blurp on porosity.. Foggy memory on that. I'm guessing the porosity is due to surface roughness. It's not like a sponge. (Maybe alittle?..but guessing not.) I suppose some adhesive volume is used in filling between the microgaps in the surface. Then more adhesive is needed for the bond. More adhesive further if greater gap is needed. Clues to ferrite surface roughness(porosity): Low sheen, gets glossy when coated, feels chalky.

Superglue

really...

I got a hobby shop in the neighborhood..I'll check it out. Thanks

Superglue

I like CA fro ferrite. No mix, fast initial bond,thin bond line,seems to bond to ferrite very well, good wetting. The only thing that might be a bug is if the CA can't handle the heat from the magnetics and the ferrite heat expansion/contraction changes from the heat.

Power Integrations actually recommend it IIRC in one or more of their app notes.

Graham

-- due to the hugely increased level of spam please make the obvious adjustment to my email address

increase

use.

And wear some kind of gloves.

Power Integration recommends CA adhesive from Home Depot?