How are floor tiles made hard enough to resist wear?

To achieve the hardness and durability required for floor tiles, manufacturers utilize different methods depending on the material composition.

Ceramic Tiles

For silicate-based ceramic tiles, hardness and wear resistance are achieved through a process called vitrification. During firing in a kiln, the clay components undergo partial melting to form a glassy, noncrystalline structure. This process facilitates liquid-phase sintering, where the formation of a glassy liquid phase allows for:1
* Particle Rearrangement: The liquid phase enables a denser packing of particles through viscous flow.1
* Bond Formation: Through solution-precipitation, particles dissolve and reprecipitate at the "necks" connecting larger particles, creating strong bonds.1
* Densification: This process reduces porosity and increases the overall strength and impermeability of the tile.1

Asphalt Tiles

In contrast, asphalt tiles derive their structural properties from a mixture of binders, fibers, and fillers. These tiles are created by mixing asphalts or synthetic resins with asbestos fibers, pigments, and mineral fillers at high, controlled temperatures to form a dough. This mixture is then passed through successive calenders to achieve the desired thickness and finish, resulting in a stable, wear-resistant product.2