mullite

In this case, there are two common morphologies for mullite.

Dumortierite and mullite are similar mineral species used in quality porcelain.

Alumina can react with silica to form mullite.

Unusually, mullite has no charge balancing cations present.

The crucibles were made by firing kaolinitic clay at temperatures greater than 1100℃, forming mullite.

The matrix materials are usually the same, that is C, SiC, alumina and mullite.

Mullite was first described in 1924 for an occurrence on the Isle of Mull, Scotland.

Industrial emery may contain a variety of other minerals and synthetic compounds such as magnesia, mullite, and silica.

Seabank Villa on the lochside at Kilfinichen Bay is the type locality for the mineral mullite.

It occurs associated with staurolite, andalusite, sillimanite, talc, hornblende, gedrite, mullite and corundum.

Recent research indicates that a synthetic analogue of mullite can be an effective replacement for platinum in reducing the amount of pollution generated by diesel engines.

The main phases encountered are a glass phase, together with quartz, mullite and the iron oxides hematite, magnetite and/or maghemite.

Only fibers stable at temperatures above 1000 C can be used, such as fibers of alumina, mullite, SiC, zirconia or carbon.

The toughness, strength, and Translucent of porcelain arise mainly from the formation of glass and the mineral mullite within the fired body at these high temperatures.

AlO can combine with SiO to make mullite, common names of which include Kaopolite, and Kyanite.

The temperature at which the liquidous phases crystallize in a sequence: mullite + tridymite, followed by sekaninaite and finally fayalite + clinoferrosilite (Grapes, 2010).

The acquisition gave CoorsTek a total of 44 facilities on four continents, and increased capabilities in SiC, SiN, mullite and steatite.

This produces an amorphous, highly pozzolanic state, whereas overheating can cause sintering, to form a dead burnt, nonreactive refractory, containing mullite and a defect Al-Si spinel.

AlSiO, (3AlO.2SiO), the mineral mullite, the only thermodynamically stable intermediate phase in the AlO-SiO system at atmospheric pressure.

If the needle shape mullite can form in a ceramic body during sintering, it has an effect on both the mechanical and physical properties by increasing the mechanical strength and thermal shock resistance.

Aluminium silicates are a mixture of alumina and silica, where commonly used mixtures have an alumina content from 42 to 72%; at 72% alumina the compound is known as mullite.

There is also substantial interest in dispersion of hard, non-oxide phases such as SiC, TiB, TiC, boron, carbon and especially oxide matrices like alumina and mullite.

Some materials suggested include tantalum alloys, niobium alloys, noble metals, high-silicon steels, several nickel-based superalloys, mullite, silicon carbide (SiC), glass, silicon nitride (SiN), and others.

At temperatures above 1100 C kyanite decomposes into mullite and vitreous silica via the following reaction: 3(AlO SiO) 3AlO 2SiO + SiO.

The volatility of bismuth and the relatively stable competing ternary phases BiFeO (sillenite) and BiFeO (mullite) makes the solid state synthesis of phase pure and stoichiometric bismuth ferrite challenging.