1. Product Structure and Structural Properties

1.1 Alumina Web Content and Crystal Phase Evolution

( Alumina Lining Bricks)

Alumina lining bricks are dense, crafted refractory porcelains largely composed of light weight aluminum oxide (Al â‚‚ O TWO), with web content normally ranging from 50% to over 99%, directly affecting their performance in high-temperature applications.

The mechanical strength, rust resistance, and refractoriness of these blocks increase with greater alumina focus because of the advancement of a durable microstructure controlled by the thermodynamically stable α-alumina (diamond) stage.

Throughout production, forerunner products such as calcined bauxite, integrated alumina, or synthetic alumina hydrate go through high-temperature firing (1400 ° C– 1700 ° C), promoting stage improvement from transitional alumina forms (γ, δ) to α-Al â‚‚ O ₃, which displays phenomenal firmness (9 on the Mohs scale) and melting point (2054 ° C).

The resulting polycrystalline structure includes interlocking diamond grains installed in a siliceous or aluminosilicate glazed matrix, the structure and quantity of which are meticulously regulated to stabilize thermal shock resistance and chemical sturdiness.

Minor ingredients such as silica (SiO TWO), titania (TiO â‚‚), or zirconia (ZrO â‚‚) may be presented to customize sintering behavior, improve densification, or improve resistance to details slags and changes.

1.2 Microstructure, Porosity, and Mechanical Honesty

The performance of alumina lining blocks is critically depending on their microstructure, especially grain size distribution, pore morphology, and bonding phase qualities.

Optimum blocks show great, uniformly distributed pores (shut porosity liked) and minimal open porosity (

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