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Inorganic functional materials: optimization of properties by structural and compositional control.

Anthony R West1

  • 1Department of Engineering Materials, University of Sheffield, Mappin Street, Sheffield, S1 3JD, United Kingdom. a.r.west@sheffield.ac.uk

Chemical Record (New York, N.Y.)
|August 11, 2006
PubMed
Summary
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Doping inorganic solids by substituting ions or creating vacancies enhances ionic and electronic conductivity. This review explores strategies and surprising property discoveries in materials like superconductors and battery cathodes.

Area of Science:

  • Materials Science
  • Solid-State Chemistry
  • Condensed Matter Physics

Background:

  • Doping is crucial for tuning material properties.
  • Understanding doping mechanisms is key to designing advanced materials.
  • Existing research highlights various doping strategies and their effects.

Purpose of the Study:

  • To review doping strategies for inorganic solids.
  • To examine the impact of doping on ionic and electronic conductivity.
  • To highlight novel properties discovered through doping.

Main Methods:

  • Review of literature on doping mechanisms.
  • Analysis of charge compensation in aliovalent doping.
  • Case studies of doped materials in solid-state ionics and superconductivity.

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Main Results:

  • Doping involves ion substitution, vacancy creation, or interstitial site occupation.
  • Aliovalent doping requires specific charge compensation mechanisms.
  • Examples include MgB2, Na beta-alumina, Ca12Al14O33, LiCoMnO4, Li4SiO4, and La-doped BaTiO3.
  • Extraordinary properties often emerge at material stability limits.

Conclusions:

  • Strategic doping can unlock new functionalities in inorganic solids.
  • The review provides insights into material design for conductivity and other properties.
  • Further research into materials at stability crossovers may yield novel applications.