Support

Support Options

Submit a Support Ticket

 

Illinois MATSE 280 Introduction to Engineering Materials, Lecture 3 Part 2: Structure of Ceramics

By Duane Douglas Johnson1, Omar N Sobh1

1. University of Illinois at Urbana-Champaign

Published on

Abstract

Structure of Ceramics

Issues to Address...

Structures of ceramic materials:
How do they differ from that of metals?

  • Define basic terms and give examples of each:
    • Lattice
    • Basis Atoms (Decorations or Motifs)
    • Crystal Structure
    • Unit Cell
    • Coordination Numbers
  • Describe hard-sphere packing and identify cell symmetry

Content

  • Bonding in Ceramics
  • Locating OCTAHEDRAL Interstitial Holes
  • Ionic Crystals
  • Tetrahedral and Octahedral Holes in Close-Packed Crystals
  • Interstitials Sites in FCC
  • Ionic Structures: Filling in the “holes” between Anions
  • Coordination Number and Ionic Radii
  • 3D Geometry: Limiting Cation/Anion Ration
  • Example - Predicting AX structures
  • Example EXAM QUESTIONS
  • Example of AX structures: Sodium Chloride
  • Sodium Chloride Structures Observed as Cubes
  • Example of AX structures: Cesium Chloride
  • Example of AX2: Structure of Calcium Fluoride
  • Note same structures can appear differently
    CaF2 with ratio of 1:2 for charge neutrality
  • Synopsis of Structures Found Filling Holes
  • IONIC BONDS?
  • C60 molecules arrange in a FCC arrangement
  • Example of AmBnXp Structures
  • Calculating DENSITY
  • Example of Silicate Ceramics
  • Crystalline Silica
  • Building Blocks of Silica
  • Sheets of Silica
  • Kaolinite Clay
  • Formation of Common Glasses
  • Silicate Glasses
  • Crystalline and Non-Crystalline Silica
  • Carbon Based
  • Diamond
  • RECALL: hybrid orbitals are responsible
  • Carbon Nanotubes (Multiwall, Metallic)
  • SUMMARY --- Ionic crystals

Cite this work

Researchers should cite this work as follows:

  • Duane Douglas Johnson; Omar N Sobh (2008), "Illinois MATSE 280 Introduction to Engineering Materials, Lecture 3 Part 2: Structure of Ceramics," http://nanohub.org/resources/5467.

    BibTex | EndNote

Tags

No classroom usage data was found. You may need to enable JavaScript to view this data.

nanoHUB.org, a resource for nanoscience and nanotechnology, is supported by the National Science Foundation and other funding agencies. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflect the views of the National Science Foundation.