Mullite - Wikipedia
Mullite or porcelainite[6] is a rare silicate mineral formed during contact metamorphism of clay minerals. It can form two stoichiometric forms: 3 Al 2 O 3 2 Si O 2 or 2Al 2 O 3 SiO 2. Unusually, mullite has no charge-balancing cations present. As a result, there are three different aluminium sites: two distorted tetrahedral and one octahedral.
Natural mullites: chemical composition, crystal structure, and …
2019年3月1日 · Synthetic mullite (Al 2 [Al 2+2x Si 2-2x]O 10-x) is a very well characterised material. Due to its outstanding properties it is used for a vast range of technical applications representing one of the most important groups of ceramic materials. In contrast to the synthetic product, the mineral mullite is only poorly investigated.
Structure and properties of mullite—A review - ScienceDirect
2008年1月1日 · Depending on the synthesis temperature and atmosphere mullite is able to incorporate a number of transition metal cations and other foreign atoms. The crystal structure of mullite is closely related to that of sillimanite, which is characterized by chains of edge-connected AlO 6 octahedra running parallel to the crystallographic c -axis.
Mullite - Imerys
The outstanding thermo-mechanical properties and stability of the resulting synthetic mullite make it a key component in many refractory and foundry applications. Extremely rare in its natural form, mullite is artificially produced for industry by melting or firing various alumino-silicates.
Comparison of solidification behavior of synthetic mullite and mullite …
2023年12月1日 · This report focuses on the difference between synthetic high-purity fused mullite and mullite-forming raw materials kyanite and andalusite, which are commonly used in refractories. The synthesis of high-purity samples is possible by applying containerless levitation.
Mullite(3Al 2O 3-2SiO 2)SynthesiswithAluminosiloxanes D.R.Treadwell,†,§ D.M.Dabbs,‡ andI.A.Aksay ...
Mullite Synthesis and Processing - Wiley Online Library
2005年9月26日 · General Remarks on the Different Chemical Synthesis Methods of Mullite. Processing of Mullite Ceramics General Sintering Characteristics. Sintering of Powder Compacts. Reaction Sintering of Alumina and Silica. Reaction Bonding from Different Starting Materials. Reaction Sintering of Chemically Produced Mullite Precursors
Mullite - An Introduction - AZoM.com
2001年10月3日 · Mullite is generally represented as 3Al 2 O 3 ⋅2SiO 2 (i.e. 60 mol% Al 2 O 3). But in reality, it is a solid solution that has the equilibrium composition limits of 60–63 mol% Al 2 O 3, below 1600 °C. Different starting materials and preparation techniques are used to produce synthetic mullite ceramics.
[PDF] Synthetic Mullite Precursors: Preparation, Structure and ...
Mullite is a strong candidate material for structural applications under thermal and mechanical load due to its property profile that combines high thermal and chemical stability with relatively low thermal expansion and high creep resistance.
(PDF) Microstructural characteristics, properties, synthesis and ...
2022年3月1日 · Mullite, an intermediate phase of the binary alumina-silica system, is one of the most important phases of ceramic products containing alumina and silica in the initial composition.
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