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URL: German potter Cornelius Breymann investigates limit formulas, eutectics
Click the link below to go to this page
https://www.youtube.com/watch?v=FVUuhjnjAoA
On this Youtube video Cornelius will take you on a slow and deliberate journey. If you stick with him you will discover how, by industrious blending of feldspar, calcium carbonate and silica we can see what ratios of CaO, SiO2 and Al2O3 (and the materials sourcing them) produce a well-melted high temperature glaze. You will see how the process demonstrates where feldspar comes up short as a glaze by itself and what it needs to be one. And you will see the CaO:SiO2:Al2O3 eutectic demonstrated.
Related Information
Links
| Glossary |
Limit Formula
A way of establishing guideline for each oxide in the chemistry for different ceramic glaze types. Understanding the roles of each oxide and the limits of this approach are a key to effectively using these guidelines. |
|---|---|
| Glossary |
Eutectic
In ceramics, this term refers to certain chemistries that melt at much-lower-than-expected temperatures. |
| Materials |
Feldspar
In ceramics, feldspars are used in glazes and clay bodies. They vitrify stonewares and porcelains. They supply KNaO flux to glazes to help them melt. |
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