mullite

Definitions

noun mineralogy An orthorhombic-dipyramidal mineral containing aluminum, oxygen, and silicon.

-ite

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Gradually the clay changes into a crystal called mullite:

Chapter 8 1990
New materials, such as mullite, may crystallise from the liquid at temperatures which may reach approximately 1,100 °C for some brickmaking clays.

Chapter 5 1984
For refractory purposes, high-alumina materials, fire clays, and a product called synthetic mullite (produced in the United States and elsewhere), can be used in place of kyanite and its related minerals.

Kyanite 2008
Synthetic mullite is made from bauxite (aluminum ore), clays, and silica (quartz) sand.

Kyanite 2008
More silica is released during mullite formation and the alumina content increases.

Chapter 8 1990
After a few firings the slabs will stop bending because reinforcing mullite crystals have formed.

1. Refractories 1987
Kaolin crystals change gradually into mullite at high temperatures.

1. Refractories 1987
Fig. 1-13: Lattice-work of mullite crystals reinforces the fired clay.

1. Refractories 1987
The kaolin crystals in the clay start slowly to change into mullite crystals (fig. 113) above 1000 °C.

1. Refractories 1987
The partly melted mass between the grog particles will enable the mullite crystals to grow freely.

1. Refractories 1987