ferrite machining?
in [Design]
|
Prev: Heat effect on FR4?
Next: More PIC fun
From: Bill Sloman on 12 Jun 2010 19:27 On Jun 12, 7:18 pm, BlindBaby <BlindMelonChit...(a)wellnevergetthatonethealbumcover.org> wrote: > On Sat, 12 Jun 2010 09:18:29 -0700 (PDT),Bill Sloman > > <bill.slo...(a)ieee.org> wrote: > >Regular ferrites aren't resin-bonded. You can get resin-bonded soft > >and hard ferrites, but the resin dilutes the magnetic material and > >the magnetic performance is consequently poor. > > Ferrite are specifically formulated to keep the magnetic particles > APART from each other, idiot. Only in the sense that the crystal structure that you get at the atomic scale spaces the magnetic nuclei at the right separation from each other to maximise the kind of interaction that you want. Resin-bonding couples rather larger groups of atoms. It doesn't have any effect on the atom-to-atom spacings that dictate the basic magentic properties of the lumps of ferrite being bonded, but the space taken up by the resin means that there is less room for ferrite. -- Bill Sloman, Nijmegen
From: Bill Sloman on 12 Jun 2010 19:30 On Jun 12, 7:19 pm, BlindBaby <BlindMelonChit...(a)wellnevergetthatonethealbumcover.org> wrote: > On Sat, 12 Jun 2010 09:18:29 -0700 (PDT),Bill Sloman > > <bill.slo...(a)ieee.org> wrote: > >Sintering depends on the same process of solid state diffusion that > >makes ceramics hard, but managanese-zinc and nickel-zinc ferrites > >aren't ceramics -inorganic non-metallic solids - and shouldn't be > >expected to have similar properties, or to react to heat treatment in > >the same way. > > They don't, idiot. That is why they are described as being "ceramic > like". But not enough like ceramics for the comparison to be useful? So why did you bring ceramics into the discussion in the first place? -- Bill Sloman, Nijmegen
From: BlindBaby on 12 Jun 2010 20:14 On Sat, 12 Jun 2010 16:27:33 -0700 (PDT), Bill Sloman <bill.sloman(a)ieee.org> wrote: >On Jun 12, 7:18�pm, BlindBaby ><BlindMelonChit...(a)wellnevergetthatonethealbumcover.org> wrote: >> On Sat, 12 Jun 2010 09:18:29 -0700 (PDT),Bill Sloman >> >> <bill.slo...(a)ieee.org> wrote: >> >Regular ferrites aren't resin-bonded. You can get resin-bonded soft >> >and hard ferrites, but the resin dilutes the magnetic material and >> >the magnetic performance is consequently poor. >> >> � Ferrite are specifically formulated to keep the magnetic particles >> APART from each other, idiot. > >Only in the sense that the crystal structure that you get at the >atomic scale spaces the magnetic nuclei at the right separation from >each other to maximise the kind of interaction that you want. > >Resin-bonding couples rather larger groups of atoms. It doesn't have >any effect on the atom-to-atom spacings that dictate the basic >magentic properties of the lumps of ferrite being bonded, but the >space taken up by the resin means that there is less room for ferrite. That depends on the level of liquefaction introduced.
From: BlindBaby on 12 Jun 2010 20:16 On Sat, 12 Jun 2010 16:30:38 -0700 (PDT), Bill Sloman <bill.sloman(a)ieee.org> wrote: >On Jun 12, 7:19�pm, BlindBaby ><BlindMelonChit...(a)wellnevergetthatonethealbumcover.org> wrote: >> On Sat, 12 Jun 2010 09:18:29 -0700 (PDT),Bill Sloman >> >> <bill.slo...(a)ieee.org> wrote: >> >Sintering depends on the same process of solid state diffusion that >> >makes ceramics hard, but managanese-zinc and nickel-zinc ferrites >> >aren't ceramics -inorganic non-metallic solids - and shouldn't be >> >expected to have similar properties, or to react to heat treatment in >> >the same way. >> >> � They don't, idiot. �That is why they are described as being "ceramic >> like". > >But not enough like ceramics for the comparison to be useful? So why >did you bring ceramics into the discussion in the first place? I didn't. Someone else did, and they called them ceramic. I corrected him, and then I referenced that here. IF you had enough brains to actually have read the entire thread, you might have caught that. But I fear that you don't catch much. Shame, that... smallpox or the like comes to mind.
From: BlindBaby on 12 Jun 2010 20:17
On Sat, 12 Jun 2010 16:32:43 -0700 (PDT), Bill Sloman <bill.sloman(a)ieee.org> wrote: >BlindBaby was expressing himself with his usual lack of precision. Talk about PKB. |