1. Product Structure and Structural Residence

1.1 Alumina Content and Crystal Phase Evolution

( Alumina Lining Bricks)

Alumina lining blocks are thick, crafted refractory ceramics primarily composed of aluminum oxide (Al â‚‚ O FIVE), with material normally varying from 50% to over 99%, directly influencing their efficiency in high-temperature applications.

The mechanical strength, corrosion resistance, and refractoriness of these blocks boost with greater alumina focus due to the development of a durable microstructure controlled by the thermodynamically stable α-alumina (diamond) stage.

Throughout manufacturing, forerunner products such as calcined bauxite, integrated alumina, or synthetic alumina hydrate undertake high-temperature firing (1400 ° C– 1700 ° C), advertising phase makeover from transitional alumina kinds (γ, δ) to α-Al Two O SIX, which displays remarkable solidity (9 on the Mohs scale) and melting point (2054 ° C).

The resulting polycrystalline framework contains interlocking corundum grains embedded in a siliceous or aluminosilicate glazed matrix, the structure and quantity of which are carefully controlled to stabilize thermal shock resistance and chemical durability.

Small additives such as silica (SiO â‚‚), titania (TiO â‚‚), or zirconia (ZrO TWO) may be presented to modify sintering behavior, improve densification, or improve resistance to details slags and fluxes.

1.2 Microstructure, Porosity, and Mechanical Stability

The performance of alumina lining blocks is seriously depending on their microstructure, particularly grain dimension distribution, pore morphology, and bonding stage qualities.

Optimal bricks exhibit fine, evenly dispersed pores (shut porosity favored) and marginal open porosity (

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