Fluorspar
Formula: CaF2
| DENS - Density (Specific Gravity) |
3.10 |
| MLPT - Melting Point (MP) |
1330C M |
CaF2 is used in frit preparation and as a low-fire enamel opacifier. It's value lies in the fact that it is an active flux and at the same time an opacifier.
At higher temperatures the fluorine becomes volatile and is released as a poisonous gas. This happens as O2 combines with CaF2 to produce CaO and F2 gas. Even if the gas can be tolerated, the material slowly decomposes to evolve the fluorine gas, and thus is troublesome for use in glazes because of the blistering problems.
If fluorspar is being used as a source of Ca at higher temperatures to create CaO oxide in a glass there has to be an oxidizing atmosphere in the kiln to supply the needed oxygen.
Fluorspars have varying amounts of iron contamination and can be very clean.
Mechanisms
Out Bound Links
- (URLs)
Fluorspar at Wikipedia
http://en.wikipedia.org/wiki/Fluorspar - (Hazards)
Fluorine Gas
Hazards of this material in the ceramic industry a... - (Materials - Related)
Sodium Fluosilicate - Na2SiF6
Sodium Silcofluoride
- (Temperatures)
Fluorspar melts (1330C-?)
- (Oxides - Unspecified)
F - Fluorine
- (Typecodes)
1: GNM - Generic Material
- (Typecodes - Unspecified)
1: OPA - Opacifier
- (Typecodes)
1: FLS - Flux Source
- (MDT - Member)
Latin and South America
Latin America and South America. We are working on... - (MDT - Member)
Europe
Countries of Eastern Europe and former Soviet Unio... - (MDT - Member)
Australia
We are working on this database and would apprecia... - (MDT - Member)
Asia
All of Asia including Turkey, Russia, Indosnesia, ... - (URLs - Related Information)
Calcium Fluoride on Wikipedia
http://en.wikipedia.org/wiki/Calcium_fluoride - (MDT - Member)
Africa
All of continental Africa. We are working on this ... - (MDT - Member)
New Zealand
We are working on this database and would apprecia... - (MDT - Member)
North America
The decision about what materials to include in th... - (MDT - Member)
UK
We are working on this database and would apprecia... - (MDT - Member)
Crystal Glazes
These materials are specially defined for makers o... - (MDT - Member)
Enamel Industry
We are working on this database and would apprecia... - (MDT - Member)
Glass Industry
The materials included in this MDT were selected i...
In Bound Links
- (Troubles - Unspecified)
Glaze Blisters
Questions and suggestions to help you reason out t...
XML for Import into INSIGHT
<?xml version="1.0" encoding="UTF-8"?>
<material name="Fluorspar" descrip="" searchkey="Fluorite, Calcium Fluoride, Blue John" loi="0.00" casnumber="7789-75-5">
<oxides>
<oxide symbol="CaO" name="Calcium Oxide, Calcia" status="U" percent="71.800" tolerance=""/>
<oxide symbol="F" name="Fluorine" status="" percent="48.650" tolerance=""/>
</oxides>
</material> | 
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