Structure Of Ceramics Ppt

The arrangement of ions and atoms affect the thermal electrical dielectric optical and magnetic properties of ceramics.

Structure of ceramics ppt.

Properties of ceramics classification of ceramics ceramic raw material fabricating and processing of ceramic application of ceramics 1 glasses 2 clay products 2 1 structural clay product 2 2 whitewares 3 refractories. Although toughened ceramics are far less tough than metals they represent a vast improvement over conventional ceramics and glass. Chapter 3 structures of metals ceramics the properties of a material depends on the arrangement of atoms within the solid. Glass ceramics are made of small grains surrounded by a glassy phase and have properties in between those of glass and ceramics.

A polycrystalline structure through heat treatment proportion of crystalline phase range 90 to 98 remainder being unconverted vitreous material grain size usually between 0 1 1 0 m 4 and 40 in significantly smaller than the grain size of conventional ceramics this fine crystal structure makes glass ceramics. Fe ni al called cations and non metallic ions e g. 1 relative sizes of ions formation of stable structures. Outline of topic 3.

Fracture toughness is defined as the stress intensity factor at a critical point where crack propagation becomes rapid. Close packed oxygen in a lattice usually fcc cations fit into interstitial sites among oxygen ions. In a single crystal the atoms. Ceramic crystal structure broader range on chemical composition than metals with more complicated structures contains at least 2 and often 3 or more atoms usually compounds between metallic ions e g.

Amorphous structure means that atoms are not organized according to a well ordered repeating arrangement as in crystals. Oxygen anions larger than metal cations. Structure of metals ceramics ppt. 3 1 fireclay 3 2 silica 3 3 basic refractories 3 4 special refractories 4 abrasives 5 cements 6.

O n cl called anions bonding will usually have some covalent character but is. Structure of ceramics all structures consist of one of the 14 well known bravais lattices plus a collection of atoms the basis that decorates each lattice point. Advanced structural ceramics advanced structural ceramics prospects of toughened ceramics. Academia edu is a platform for academics to share research papers.