Crystal Research and Technology
© WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Editor: Wolfgang Neumann (Editor-in-Chief), Klaus-W. Benz (Consulting Editor)
Online ISSN: 1521-4079
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Recently Published Articles
- Growth, composition, ferroelectric and magnetic properties of new multiferroic Pb3.3Mn4.8Ni1.1Ti0.56O15.3 single crystals
V. Tomov, P. M. Rafailov and Chih-Wei Luo
Version of Record online: 23 JUN 2016 | DOI: 10.1002/crat.201600102
In search for new multiferroics we have doped the antiferromagnetic system Pb-Mn-Ni-O with Titanium. The novel single crystals Pb3.3Mn4.8Ni1.1Ti0.56O15.3 exhibit indeed multiferroic behavior. The new material’ layered structure gives rise to anizotropic antiferromagnetism below 43 K. The transition between ferroelectric and paraelectric state around 430 K is evidenced by the abnormally large, pronouncedly frequency dependent dielectric constant and is additionally confirmed by temperature dependent XRD and Raman measurements.
- Surfactant directed synthesis of mesoporous alumina and α-alumina single crystal
Geetanjali Mishra, Barsha Dash, Ajit Dash and I.N. Bhattacharya
Version of Record online: 20 JUN 2016 | DOI: 10.1002/crat.201600087
Sodium dodecyl sulphate mediated synthesis of mesoporous alumina nanoboxes show high porosity and high adsorption capacity when heat treated. The adsorption capacity was found to be 99% with 15 minutes at 27 °C for a Congo red solution of 500 mg/L concentration. Further heat treatment upto 1200 °C results in the alpha alumina single crystal with rhombohedral geometry.
- Large-scale production of well-dispersed submicro ZrB2 and ZrC powders
Liuyang Bai, Yongwei Wang, Huayi Chen and Fangli Yuan
Version of Record online: 16 JUN 2016 | DOI: 10.1002/crat.201600051
Well-dispersed submicro ZrB2 and ZrC powders were synthesized, and the proposed technique is a universal method that can produce similar high-temperature ceramic powders. Well-dispersed submicro powders have the advantage of small-size effect while avoid the problem brought by nanopowders, which might help achieve full densification and high mechanical properties of high-temperature ceramics.
- Size and morphology controlled synthesis of barium sulfate (pages 393–399)
Emel Akyol and Murat Alper Cedimagar
Version of Record online: 16 JUN 2016 | DOI: 10.1002/crat.201600046
In this work submicron barium sulfate (BaSO4) particles were synthesized successfully by chemical precipitation technique. Experimental studies revealed that the additive concentration and pH had great effect on the morphology and size of barium sulfate. Our results could be useful for chemical and manufacturing industries due to achieving in preparing submicron BaSO4 particles with good dispersion under mild conditions.
- Influences of ethanol on the thermodynamics and kinetics in the crystallization of xylitol (pages 405–408)
Anne Hartwig and Joachim Ulrich
Version of Record online: 16 JUN 2016 | DOI: 10.1002/crat.201600092
Ethanol plays an important role in the production of xylitol products from aqueous solutions. It could be shown that already small amounts of ethanol have an apparent effect on the thermodynamics and kinetics of the crystallization from xylitol solutions. Not only the solubility is decreased, also the nucleation and crystal growth are inhibited. Thus, low ethanol amounts have to be seen as co-solvent rather than as additive or impurity.