Developments in Ceramic Materials Research

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74 T. T. Basiev, V. A. Demidenko, K. V. Dykel’skii et al. Figure 19. Characteristic microphotograph of precursor for the Gd 2O 2S: Nd 3+ and La 2O 2S: Nd 3+ ceramics. The microstructure of the ceramics is studied using optical and electron microscopes. Characteristic microphotographs of the ceramic samples are presented in Figure 20. For the Gd2O2S based samples the most typical is the elongated grains shape (Figure 20a, b), as for the La2O2S ceramics it is isometric (Figure 20c). For the Gd2O2S based ceramics, a clear-cut correlation between the grain shape and the Nd 3+ impurity concentration is observed. Whereas for 0.1 wt.% concentration of Nd 3+ the microstructure of ceramics consists of the mixed shape grains (Figure 20a), a five-fold increase of the impurity concentration makes the long bar shape the dominant (Figure 20b). Figure 20 (Continued). a
Optical Fluoride and Oxysulfide Ceramics: Preparation and Characterization 75 Figure 20. Characteristic microphotographs of ceramic samples: a - Gd 2O 2S:Nd (0,1wt.%), b - Gd2O 2S:Nd (0,5wt.%), c - La 2O 2S:Nd (1wt.%). b c The texture over the (001) plane in Gd2O2S: Nd 3+ samples is estimated by x-ray diffraction and reveals the influence of the impurity concentration: the texture in (001) plane get halved upon raising the Nd 3+ concentration from 0.1 to 0.5 wt. %, that corresponds to reduction of quantity of grains oriented along this plane. Further a spectroscopic characteristics of oxysulfide translucent optical ceramics which can be perspective for 1-μm lasing with high quantum efficiency [48, 49] is given.
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DEVELOPMENTS IN CERAMIC MATERIALS R
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Copyright © 2007 by Nova Science P
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PREFACE Ceramics are refractory, in
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Preface ix crystals is discussed. A
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Preface xi spectra and the directio
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2 Leslie G. Cecil comprehensive dat
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4 Leslie G. Cecil Ringle et al. (19
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6 Leslie G. Cecil The main architec
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8 Leslie G. Cecil can study “the
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10 Leslie G. Cecil Middleton et al.
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12 Leslie G. Cecil The laser ablate
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14 Leslie G. Cecil There are two ge
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16 Leslie G. Cecil distinct recipes
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18 Leslie G. Cecil second group (Fi
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20 Leslie G. Cecil The Vitzil-Orang
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22 Leslie G. Cecil Table 3. Mahalan
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Page 50 and 51: 36 Z. C. Li, Z. J. Pei and C. Tread
Page 68 and 69: 54 T. T. Basiev, V. A. Demidenko, K
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Synthesis, Spectroscopic and Magnet
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Intensity (a.u.) Intensity (a.u.) 8
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In: Developments in Ceramic Materia
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The Use of Ceramic Pots in Old Wors
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3.2. Wall-in Positions The Use of C
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IACC ( τ ) = t2 ∫ The Use of Cer
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where σ res is the scattering cros
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D50 0.8 0.7 0.6 0.5 0.4 0.3 The Use
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Definition (D50) 1 0.95 0.9 0.85 0.
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In: Developments in Ceramic Materia
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Modeling of Thermal Transport in Ce
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q x = Modeling of Thermal Transport
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212 R. Ramesh, H. Kara, Ron Stevens
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220 ε S 33 R. Ramesh, H. Kara, Ron
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242 Development of Display Technolo
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244 Li Chen technology moved to the
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246 Li Chen The continuing evolutio
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248 Li Chen the back contact cathod
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250 Li Chen Figure 3. Vertical side
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252 Li Chen Figure 6. Molybdenum mi
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254 Li Chen Figure 8(a). I-V curve
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256 Li Chen Figure 9. Life time tes
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258 Figure 11(a). Plasma generated
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260 Li Chen [13] C.A. Spindt, K.R.
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262 S. Ardizzone, C. L. Bianchi, G.
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A absorption spectra, 66, 67, 77, 7
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correlation function, 156 corrosion
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group membership, 13, 20, 21, 22, 2
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microstructure(s), x, xi, 73, 74, 2
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efraction index, 61 refractive inde
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time, vii, ix, 1, 3, 7, 8, 11, 26,
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