Crystal Research and Technology

Cover image for Vol. 52 Issue 7

Editor: Wolfgang Neumann (Editor-in-Chief), Klaus-W. Benz (Consulting Editor)

Online ISSN: 1521-4079

Associated Title(s): physica status solidi (a), physica status solidi (b), physica status solidi (RRL) - Rapid Research Letters

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Recently Published Articles

  1. High-Quality GaSb and GaInSb Crystals Prepared by Vertical Bridgman Method

    Jinwei Wang, Liguo Wang, Dongxiao Teng, Shenqiu Zhai and Juncheng Liu

    Version of Record online: 20 JUL 2017 | DOI: 10.1002/crat.201700092

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    High-quality GaSb and Ga1-xInxSb (x = 0.14) crystals were grown via the vertical Bridgman method. The results demonstrate that the segregation of indium is very low, with the radial and axial concentration variation of 2.32% and 4.84%, respectively. The indium doping significantly reduces the dislocation density down to 1.275 × 103 cm−2. The GaInSb crystal shows enhanced transport properties, with carrier mobility increased to 2.512 × 103 cm2/(V•s) and resistivity reduced to 0.521 × 10−3 ohm•cm.

  2. Mechanical Characterization of EuD4TEA- and ZnS:Mn-Enhanced Composites

    Margaret Scheiner, Kunal Joshi, Okenwa I. Okoli and Tarik J. Dickens

    Version of Record online: 17 JUL 2017 | DOI: 10.1002/crat.201700088

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    The authors assess triboluminescent (TL) materials as components in structural health monitoring (SHM) systems within polymer composites. Processing must be addressed due to particle characteristics such as density, morphology, and chemical makeup, all of which can affect polymer curing dynamics and thermo-mechanical properties. The authors consider key processing parameters during incorporation of TL compounds into various polymers and develop a model to predict composite modulus.

  3. In-Situ Observation of Nanoparticle Formation Under Different Power of Microwave Irradiation

    Yusuke Asakuma, Shungo Matsumura and Agus Saptoro

    Version of Record online: 17 JUL 2017 | DOI: 10.1002/crat.201700108

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    Sizes of bubble and nanoparticle particle were measured during and after microwave irradiation using a DLS apparatus. The maximum bubble sizes were greatly influenced by the irradiation power and solute concentration, which are related with particle number density. To prevent superheating effect, the irradiation power and number density should be controlled to ensure a stable operation of particle formation process.

  4. Inorganic Crystals with Glass-Like and Ultralow Thermal Conductivities

    Matt Beekman and David G. Cahill

    Version of Record online: 7 JUL 2017 | DOI: 10.1002/crat.201700114

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    Why do some crystals conduct heat like a glass? Understanding the reasons why could help advance technologies that depend on low thermal conductivity crystalline materials, including thermal barrier coatings and thermoelectric energy conversion. In this review, we highlight what is currently known about the structure and lattice dynamics in these fascinating yet still relatively poorly understood materials.

  5. Synthesis and Ball Milling Effect on Thermal Conductivity of PbTe Based Alloys

    Aleksandra K. Królicka, Aleksandra Mirowska, Andrzej Materna and Mirosław Piersa

    Version of Record online: 7 JUL 2017 | DOI: 10.1002/crat.201600376

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    This work analyses the effect of ball milling time and the secondary phases presence on the microstructure and crystallite size of PbTe:Cr, I and PbTe:Ag,La consolidated samples. The optical microscopy, scanning electron microscopy (SEM) and X-ray powder diffraction (XRD) studies were performed in order to determine the size of the obtained powder particles. The thermal conductivity versus temperature measurements were conducted and showed decrease in κ values with milling time.