Gaye Sekula on sun 12 dec 04
Ok, I found found where I may be able to substitute lithium for spodumene. I
have not found whether or not this would be gram for gram or ounce for ounce.
Please enlighten me.
Thanks,
Gaye
San Antonio
Lynne Burke on sun 12 dec 04
Hi Gaye,
I am getting ready to test a glaze substituting the opposite, i.e. replacing
the lithium carbonate with spodumene. I, too, am wondering what the
substitution ration would be. I plan to start with 1:1, but if anyone out
there knows what it should be, perhaps we could both get some assistance!
Lynne Burke
>From: Gaye Sekula
>Reply-To: Clayart
>To: CLAYART@LSV.CERAMICS.ORG
>Subject: Spodumene Substitute/Lithium
>Date: Sun, 12 Dec 2004 09:16:00 EST
>
>Ok, I found found where I may be able to substitute lithium for spodumene.
>I
>have not found whether or not this would be gram for gram or ounce for
>ounce.
>Please enlighten me.
>
>Thanks,
>Gaye
>San Antonio
>
>______________________________________________________________________________
>Send postings to clayart@lsv.ceramics.org
>
>You may look at the archives for the list or change your subscription
>settings from http://www.ceramics.org/clayart/
>
>Moderator of the list is Mel Jacobson who may be reached at
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Daniel Semler on sun 12 dec 04
Hi Gaye,
> Ok, I found found where I may be able to substitute lithium for spodumene. I
> have not found whether or not this would be gram for gram or ounce for ounce.
I assume by lithium you mean lithium carbonate (Li2CO3 ?
Spodumene (which one are you using ?) and Li2CO3 are not interchangeable in a
direct way. Additional changes would be required. Spod contains silica and
alumina as well.
I think in your other post you noted that you were short 1 and 1/2 oz in
100oz. Is the recipe total 100oz or is that the spod content ? If its the spod
content, I would not expect 1 1/2oz shortage to make any difference really.
Having said that, if this is the total recipe (which I think you said it is)
then it would more depend on the proportion of spod in the glaze. How much spod
does the glaze normally have ?
I assume that the option of making less glaze is not open, as you've already
started ? If this is true, adjustments to compensate for spod would be harder,
though they can be done.
Thanx
D
Astabeth on sun 12 dec 04
I may be software happy - I just finished an independant study on
glaze chemistry software - but it looks to me like 5 parts spodumene
for every one part lithium carbonate - but the spodumene also brings
silica and alumina so you might have to adjust the whole recipe to get
it just right.
Good luck!
Beth in AL
Daniel Semler on sun 12 dec 04
Hi Lynn,
It can't simply be substituted. Spod is a more complex material containing
silica and alumina as well. The recipe can be reworked though to use one over
the other. If you want to send me the recipe I'd be happy to play with it for
you. I need to do more of this anyway.
RR can check my answers - I've still got training wheels on.
Thanx
D
> Hi Gaye,
>
> I am getting ready to test a glaze substituting the opposite, i.e. replacing
> the lithium carbonate with spodumene. I, too, am wondering what the
> substitution ration would be. I plan to start with 1:1, but if anyone out
> there knows what it should be, perhaps we could both get some assistance!
>
> Lynne Burke
>
> >From: Gaye Sekula
> >Reply-To: Clayart
> >To: CLAYART@LSV.CERAMICS.ORG
> >Subject: Spodumene Substitute/Lithium
> >Date: Sun, 12 Dec 2004 09:16:00 EST
> >
> >Ok, I found found where I may be able to substitute lithium for spodumene.
> >I
> >have not found whether or not this would be gram for gram or ounce for
> >ounce.
> >Please enlighten me.
> >
> >Thanks,
> >Gaye
> >San Antonio
> >
>
>______________________________________________________________________________
> >Send postings to clayart@lsv.ceramics.org
> >
> >You may look at the archives for the list or change your subscription
> >settings from http://www.ceramics.org/clayart/
> >
> >Moderator of the list is Mel Jacobson who may be reached at
> >melpots@pclink.com.
>
> _________________________________________________________________
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> ______________________________________________________________________________
> Send postings to clayart@lsv.ceramics.org
>
> You may look at the archives for the list or change your subscription
> settings from http://www.ceramics.org/clayart/
>
> Moderator of the list is Mel Jacobson who may be reached at
> melpots@pclink.com.
>
Ivor and Olive Lewis on mon 13 dec 04
Do not forget that if you use Lithium Carbonate to replace Spodumene
you will need to compensate for the elimination of some Silicon
dioxide and |Aluminium oxide by adding some replacements
Best regards,
Ivor Lewis.
Redhill,
S. Australia.
Ian Currie on mon 13 dec 04
Hi Lynne
Do *not* replace it on a 1:1 basis. It should be more like 1:6 with 1=20
of lithium carb. to 6 of spodumene. I've just done a quick sub on a=20
random glaze and that is what it works out at. But you need someone to=20
do it for your glaze, using glaze software or a spreadsheet set up for=20
the task... The spod contains lots of alumina and silica where the=20
lithium carb has none, so as well as the substitution bringing in=20
lithium carb, you need to bring in substantial kaolin and silica as well.=
..
And you will find the lithium carb. is a bit soluble, and can penetrate=20
the bisque... I suspect the result will be different, but try it. Use=20
gloves with the lithium carb.
Hope this is some help
Ian
http://ian.currie.to/
Lynne Burke wrote:
> Hi Gaye,
>=20
> I am getting ready to test a glaze substituting the opposite, i.e.=20
> replacing
> the lithium carbonate with spodumene. I, too, am wondering what the
> substitution ration would be. I plan to start with 1:1, but if anyone =
out
> there knows what it should be, perhaps we could both get some assistanc=
e!
>=20
> Lynne Burke
>=20
>> From: Gaye Sekula
>> Reply-To: Clayart
>> To: CLAYART@LSV.CERAMICS.ORG
>> Subject: Spodumene Substitute/Lithium
>> Date: Sun, 12 Dec 2004 09:16:00 EST
>>
>> Ok, I found found where I may be able to substitute lithium for=20
>> spodumene.
>> I
>> have not found whether or not this would be gram for gram or ounce for
>> ounce.
>> Please enlighten me.
>>
>> Thanks,
>> Gaye
>> San Antonio
>>
>> ______________________________________________________________________=
________=20
>>
>> Send postings to clayart@lsv.ceramics.org
>>
>> You may look at the archives for the list or change your subscription
>> settings from http://www.ceramics.org/clayart/
>>
>> Moderator of the list is Mel Jacobson who may be reached at
>> melpots@pclink.com.
>=20
>=20
> _________________________________________________________________
> FREE pop-up blocking with the new MSN Toolbar =96 get it now!
> http://toolbar.msn.click-url.com/go/onm00200415ave/direct/01/
>=20
> _______________________________________________________________________=
_______=20
>=20
> Send postings to clayart@lsv.ceramics.org
>=20
> You may look at the archives for the list or change your subscription
> settings from http://www.ceramics.org/clayart/
>=20
> Moderator of the list is Mel Jacobson who may be reached at=20
> melpots@pclink.com.
>=20
Gaye Sekula on wed 15 dec 04
A friend asked if I had gotten the answer I was looking for concerning
substituting lithium for spodumene. She pointed out that I had gotten many
responses. I am so glad she asked because I had only received two replies. I looked in
my SPAM folder and they are not there. I don't know what has happened but I
have not gotten even half of the responses that I now see in the archives.
Thank God for the archives! I WILL BE ANSWERING EVERY POST TODAY, I PROMISE.
Please forgive that I have not done so sooner.
Thank you to EVERYONE who took the time to answer and thank you to Gay for
asking if I had gotten my answer. I am grateful, really I am!
Gaye
San Antonio
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