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Synthesis and Characterization of Advanced Materials (1984) / Chapter Skim
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3. Summary of Scientific and Technological Accomplishments
Pages 12-17

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From page 12...
... Several activities allied with preparation have played key roles in semiconductor materials advances. Characterization of the chemical purity and electrical properties and careful studies of point and extended defects have been essential for progress at every stage, as have the theoretical description of impurity and dopant partition and the interaction of defects.
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From page 13...
... The present families of important materials include polycrystalline ferrites, which are used in cores and memories, and single-crystal magnetic garnets, which are used in bubble-domain memories. Luminescent materials play an essential role in modern instrument and appliance displays, TV picture tubes, and fluorescent lighting.
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From page 14...
... Electronic ceramics, such as piezoelectric lead zirconate titanate, doped ZnO and related nonlinear resistance (varistor) materials, and the complex ceramic conductors used in thick-film hybrid integrated circuits are examples of contributions of ceramic science to modern technology where SACAM has been instrumental.
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From page 15...
... Thus:, the discovery:: that .~ ruthenium-titanium oxides can replace mercury anodes was of great importance. These new dimensionally stabilized anodes permit higher current efficiencies, thins conserving energy and, at the same time, eliminating mercury pollution.
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From page 16...
... For example, our understanding of the magnetochemistry and spectroscopy of the magnetic and nonmagnetic garnets required the availability of well-characterized single crystals of scores of garnet compositions. The technological fruits of these scientific acievements included bubble garnet memories and low-threshold optically pumped lasers.
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From page 17...
... Another example of an important basic scientific advance, which resulted from semiconductor studies and stimulated technological progress, is the conceptualization of the Frank-Read source, the dislocation mechanism whereby basic crystal growth kinetics can be understood.
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Key Terms

  • single crystals
  • materials include
  • picture tubes
  • semiconductor materials
  • preparative techniques

  • modern technology
  • careful control
  • piezoelectric lead
  • bed applications
  • structure materials

  • materials play
  • chemical purity
  • initial stimulus
  • frequently precede
  • anodes permit

  • electronic substrates
  • specific achievements
  • carefully controlled
  • current efficiencies
  • amorphous silicon

  • closely associated
  • band structure
  • luminescent properties
  • fiber transmission
  • pumped lasers

  • substantial contributions
  • petroleum feedstocks
  • processing techniques
  • nonlinear optical
  • extensive research


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