|Monthly Tech-Tip |
Alternate Names: Burnt Lime, Dead-burned lime
Quicklime is calcined calcium carbonate or limestone. It is unstable (wants to reabsorb the lost CO2) so must be used quickly or sealed from exposure to the air. It is used as a source of CaO in the glass and enamel industries and in refractories (often in combination with calcined dolomite).
If Quicklime is calcined higher than necessary for slaking (to make calcium hydroxide) it is referred to as dead-burned lime.
Quicklime at Wikipedia
What is Quicklime at SpecialtyMinerals.com
Lime kiln at wikipedia
|Oxides||CaO - Calcium Oxide, Calcia|
Materials that source Na2O, K2O, Li2O, CaO, MgO and other fluxes but are not feldspars or frits. Remember that materials can be flux sources but also perform many other roles. For example, talc is a flux in high temperature glazes, but a matting agent in low temperatures ones. It can also be a flux, a filler and an expansion increaser in bodies.
Materials that melt at high temperatures. These are normally used for kiln bricks, furniture, etc. or for ceramics that must withstand high temperatures during service.
|Temperatures||Calcium carbonate decomposition (750C-1000C)|