Refractories

2. This product is formed in the absence of air by thermal decomposition of natural gas
7. Double carbonate of calcium and magnesium
9. Naturally occurring, magnesia end member of the olivine solid- solution series.
10. The state of a basic refractory material resulting from a heat treatment
11. Defect caused due to thermal shock difference in furnaces.

1. What phase is formed when silica is heated above 1470oC.
3. This raw material is predominantly used in kiln furniture.
4. Structural units that adheres the aggregates and matrix ingredients is called
5. High grade of Magnesium oxide is called as
6. This acid is an example of inorganic binder
8. This material is found in flake form and, if used in a refractory product, is usually part of a mixture with ceramic material or used for the binder.
9. Also known as Chamotte which contains less than 50% Alumina