Chapter 13: Applications and Processing of Ceramics

Ceramics are systematically classified into functional categories including glasses, glass-ceramics, structural clay products, whitewares, refractories, abrasives, cements, biomaterials, carbon allotropes, and advanced ceramics, each optimized for specific performance requirements. Glasses such as soda-lime and borosilicate formulations offer transparency and thermal shock resistance, while glass-ceramics achieve superior strength and low thermal expansion through controlled crystallization processes that produce commercial materials like Pyroceram. Clay-based ceramics encompass structural products including bricks and tiles alongside whitewares such as porcelain and sanitary ware, both requiring hydroplastic forming or slip casting followed by controlled drying and high-temperature firing to achieve vitrification. Refractory ceramics withstand extreme thermal and chemical environments in furnaces and reactors through materials like alumina, zircon, magnesia, and silicon carbide. Abrasive ceramics including diamonds, corundum, and cubic boron nitride provide hardness necessary for grinding and machining operations. Portland cement represents the major binding agent in construction, hardening through hydration reactions with aggregates. Ceramic biomaterials such as yttria-stabilized zirconia, hydroxyapatite, and bioactive glasses enable orthopedic and dental implants through biocompatibility and mechanical strength. Carbon materials span from traditional graphite and diamond to advanced nanoforms including fullerenes, carbon nanotubes, and graphene, each exhibiting distinct thermal, electrical, and structural properties. Fabrication methods encompass glass forming techniques like float processing and tempering, powder consolidation through uniaxial and hot pressing followed by sintering, tape casting for thin ceramic sheets, and emerging three-dimensional printing technologies including stereolithography and polymer-derived ceramic processing. These interconnected processing-composition-microstructure relationships demonstrate how ceramics are engineered from atomic scales to macroscopic applications.