Optical ceramics (OC) are transparent or translucent materials constituted by tight aggregating crystallite micro- or nanograins, each randomly oriented with respect to their neighbours. They have been under development as an alternative to single crystal materials to provide bulk optical elements in the case where single crystals cannot form or when ceramic materials show superior optical and luminescence properties. Development of OC for the scintillator applications was triggered by the needs of Computer Tomography (CT) medical imaging in the 90's of last century. The manufacturing and characterization of (Y,Gd)2O3:Eu, Gd2O2S:Pr,Ce,F and Gd3Ga5O12:Cr,Ce and later on also the Eu3+ or Tb3+-doped Lu2O3 slow ceramic scintillators were reported. More recently, fast optical ceramics with scintillation response in the tens-hundreds ns time scale and based on the Ce3+-doped Y3Al5O12 (YAG) was reported in late 1990's and its higher density analog based on LuAG host doped with Ce3+ or Pr3+ was reported only several years ago for the first time. This chapter will review the latest studies in the field of fast scintillation optical ceramics in the last decade focusing on the interconnection among the manufacturing technology, scintillation performance and defect occurence and nature in the discussed material systems. The most studied group of materials are the cubic structure aluminum or multicomponent garnets, but interesting results have been achieved also in sesquioxide, silicate, hafnate, complex perovskite or rare earth halide compounds. Both basic physics and application aspects will be considered in the description of the above mentioned systems.
|Title of host publication||Recent Advances in Ceramic Materials Research|
|Publisher||Nova Science Publishers, Inc.|
|Number of pages||50|
|Publication status||Published - 2013 Dec 1|
ASJC Scopus subject areas
- Materials Science(all)