Crystal Research and Technology

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Investigation on the Growth and Properties of Six Garnet Single Crystals with Large Lattice Constants
Crystal Research and Technology - Tập 56 Số 5 - 2021
Zhiyuan Han, Dunlu Sun, Huili Zhang, Jianqiao Luo, Cong Quan, Lunzhen Hu, Kunpeng Dong, Maojie Cheng, Guangzhu Chen, Yin Hang
AbstractLarge lattice constant Y3Al5O12, Gd3Ga5O12 (GGG), Y3Sc2Ga3O12 (YSGG), Gd3Sc2Ga3O... hiện toàn bộ
The Ostwald Rule of Stages
Crystal Research and Technology - Tập 30 Số 4 - Trang 443-449 - 1995
Jaroslav Nývlt
AbstractCrystallization from solutions often starts in such a way that thermodynamically unstable phases appear first followed by recrystallization to thermodynamically stable phases. This empirical observation, called as Ostwald's rule of stages, is explamed here on the basis of structure changes of solutions. Experiments supporting this explanation have been carr...... hiện toàn bộ
Crystallization field and rate study for the formation of single phase sodium‐potassium and potassium clinoptilolite
Crystal Research and Technology - Tập 46 Số 4 - Trang 345-350 - 2011
Ö. Güvenir, Halil Kalıpçılar, Ali Çulfaz
AbstractReproducible synthesis of clinoptilolite as the single crystalline phase was achieved in the narrow crystallization field at or around the nominal batch composition of 2.1(Na2O+K2O):Al2O3:10SiO2:110H2O at 140 °C. Clinoptilolites of h...... hiện toàn bộ
Crystallization field study for the formation of single phase sodium clinoptilolite: Batch composition, seed and temperature effects
Crystal Research and Technology - Tập 44 Số 3 - Trang 293-299 - 2009
Ö. Güvenir, Halil Kalıpçılar, Ali Çulfaz
AbstractAlthough clinoptilolite is the most abundant zeolite mineral in nature, its synthesis under laboratory conditions has been difficult. A partial crystallization field study was done for the synthesis of clinoptilolite based on a nominal batch composition of 2.1Na2O:Al2O3:10Si2... hiện toàn bộ
Overview of GaAs und CdTe Pixel Detectors Using Medipix Electronics
Crystal Research and Technology - Tập 55 Số 9 - 2020
M. Fiederle, S. Procz, Elias Hamann, A. Fauler, Christer Fröjdh
AbstractGaAs and CdTe pixel detectors have been developed over the last few decades. The applications of these detectors include X‐ and gamma‐ray detectors working at room temperature. Fundamental properties such as detection efficiency and noise are determined by the material properties of the sensor material. Different materials have been evaluated over the years...... hiện toàn bộ
Thermally activated deformation of Alpha Zirconium
Crystal Research and Technology - Tập 19 Số 3 - Trang 401-405 - 1984
Zuzanka Trojanová, P. Lukáč
AbstractThe effect of temperature on the yield stress of polycrystalline α‐zirconium has been examined at temperatures between 77 and 900 K. A strong temperature dependence of the yield stress (interrupted in the temperature ranges 300 to 400 K and 500 to 700 K where the yield stress is independent of temperature) indicates the occurence of the thermally activated ...... hiện toàn bộ
Spontaneous precipitation of calcium silicate hydrate in aqueous solutions
Crystal Research and Technology - Tập 45 Số 1 - Trang 39-47 - 2010
E. Ntafalias, P. G. Koutsoukos
AbstractCalcium silicate hydrates (C‐S‐H) are very important not only for their contribution to the development of cement and concrete properties but also for use as fillers and in silicate glasses. In the present work, the thermodynamics and the kinetics of the spontaneous precipitation of C‐S‐H from aqueous solutions were investigated over the pH range 10‐12 at 2...... hiện toàn bộ
Crystallization of AgGaS2 melts enriched with Ag2S and Ga2S3
Crystal Research and Technology - Tập 43 Số 4 - Trang 409-412 - 2008
К. А. Кох, E. F. Sinyakova, A. A. Politov
AbstractIn this work we consider experiments with directed crystallization of melts with slight deviation from stoichiometric composition of AgGaS2. The evolution of melt composition was calculated for both experiments using measured chemical composition of the solid phase. Also the difference in unit cell parameters and luminescence spectra fo...... hiện toàn bộ
On the morphological instability of the growing crystals (III). Micro‐interferometric investigations of the morphological stability of KDP crystals growing from aqueous solutions
Crystal Research and Technology - Tập 23 Số 9 - Trang 1061-1071 - 1988
M. I. Staynova, Christo N. Nanev
AbstractThe paper is aimed at the elucidation of the limits to which the faceted forms of KDP crystals preserve their stability and beyond which a skeletal growth from stagnant solutions takes place. In order to avoid the natural convections the experiments were performed in two‐dimensional cells. On the basis of quantitative criteria, it has been shown that the ki...... hiện toàn bộ
Crystal Growth and Physico‐Chemical Properties of Lead Molybdate in the Homogeneity Region
Crystal Research and Technology - Tập 21 Số 4 - Trang 439-448 - 1986
В. Т. Габриелян, Л. М. Федорова, E. B. Tkachenko, A. Ya. Neiman, N. S. Nikogosian
AbstractFrom data of both X‐ray phase analysis and differential thermal analysis, as well from measurements of the crystal lattice parameters, electric conductivity and diffusion coefficients of cations in ceramics and single crystals the width of the homogeneity region of the lead molybdate phase which lies in the composition range of 49.85–50.50 mole% MoO... hiện toàn bộ
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