From: thoms1991 (thoms1991@hotmail.com)
Date: Fri Jan 10 2003 - 16:37:29 EET
Look at the phase diagrams for your ceramic systems of interest. Then select
low melting binaries and coat the grains of ceramic with an appropriate
specie. Analogously, one can sinter nickel powders at a low temperature by
first coating them with phosphorous, which offers the further advantage of
being fugitive later under select conditions.
----- Original Message -----
From: "Jonathan Harris" <j.j.harris@bham.ac.uk>
To: "'Ben May'" <benmay@pdd.co.uk>; "RP Mailing List (E-mail)"
<rp-ml@rapid.lpt.fi>
Sent: Friday, January 10, 2003 8:55 AM
Subject: RE: Ceramic sintering
> Hi Ben,
>
> Sintering temperature depends on the type of ceramic you are using. The
> definition of "low temperature" also varies widely (eg:
> http://www.delphion.com/details?pn10=US04610968).
>
> In my experience I have never come across any ceramic that sinters
anywhere
> near as low as 150 degC. The lowest I've come across is a dental
porcelain
> which will sinter to (alledgedly) full density at 970 degC. There are
ways
> of modifying the sintering behaviour of glasses/ceramics using fluxes, for
> example pure silica glass sinters at around 1,700 deg, but can be made to
> form a fully dense glass at 1,000 degC if you put enough borax into the
mix.
>
> I personally wouldn't fancy your chances of finding anything, but would be
> very interested to hear more if anyone else comes up with a solution.
>
> Regards,
>
> Jonathan.
> *******************************
> Dr Jonathan Harris
> The University of Birmingham
> The School of Dentistry
> St Chad's Queensway
> Birmingham
> B4 6NN
> UK
>
> Tel: 0121 237 2917
> Fax: 0121 237 2932
>
> http://www.ttdentistry.com
>
>
>
> -----Original Message-----
> From: Ben May [mailto:benmay@pdd.co.uk]
> Sent: 10 January 2003 12:41
> To: 'rp-ml@rapid.lpt.fi'
> Subject: Ceramic sintering
>
>
> Hi RP people
>
> Does anyone have experience of sintering ceramic? If so I need to know if
> there is a process that sinters ceramic at low temperature (max 150
degrees
> C) and if so what are the properties of the sintered material. I need to
> prototype a small electronic component which in production would be potted
> in ceramic.
>
> Kind Regards
> Ben May
> Head of the Development Centre
> Pankhurst Design and Developments Ltd
> 85-87 Richford St
> London W6 7HJ
> Tel: 020 8735 1111
> Fax: 020 8735 1122
> benmay@pdd.co.uk
> http://www.pdd.co.uk
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