Проблемы выращивания кристаллов лангасита и пути их решения

The problems of Langasite single crystals growth by Czochralski and Bridgman methods were analyzed. It was found that the deferent kinds of defects in langasite crystals influence on physical properties and thus on langasite crystals application. Vernel method was first proposed for obtaining of qualitative single crystal charge from initial components. A monophase single crystal charge obtaining was confirmed by X-ray diffraction method. A single crystal with uniform composition was obtained by Czochralski method from this chargeПроанализированы проблемы, возникающие при выращивании кристаллов лангасита методами Чохральского и Бриджмена. Показано, что на физические свойства лангасита, лежащие в основе его применения, оказывают влияние различные виды дефектов. Впервые предложен и реализован метод Вернейля, обеспечивающий получение качественной, не содержащей дефектов, монокристаллической шихты, из которой методом Чохральского выращен однородный по составу монокристалл лангасита, что подтверждено рентгенографически

Ультратонкие волокна на основе биополимера полигидроксибутирата (ПГБ), модифицированные наноразмерными модификациями диоксида титана

The technological characteristics of spinning polymer solutions (viscosity, conductivity) and the parameters of the EPI - a process based on poly-3-hydroxybutyrate modified with nanoscale titanium dioxide were optimized. The composite materials were studied by X-ray diffraction, differential scanning calorimetry, infrared spectroscopy and physico-mechanical analysis (tensile test, elongation). A significant improvement in their physical and mechanical properties (breaking length, elongation) and resistance to the maturing were found.Оптимизированы технологические характеристики формовочных полимерных растворов (вязкость, электропроводность) и параметры ЭФВ (электроформование волокнистых материалов) - процесса на основе поли-3-гидроксибутирата, модифицированных наноразмерным диоксидом титана. Композитные материалы изучены методами рентгенографии, дифференциально-сканирующей калориметрии, ИК-спектроскопии и физико-механического анализа (испытания на разрыв-удлинение). Установлено существенное улучшение их физико-механических характеристик (разрывная длина, относительное удлинение) и стойкости к старению

The problems of Langasite single crystals growth and their solution

The problems of Langasite single crystals growth by Czochralski and Bridgman methods were analyzed. It was found that the deferent kinds of defects in langasite crystals influence on physical properties and thus on langasite crystals application. Vernel method was first proposed for obtaining of qualitative single crystal charge from initial components. A monophase single crystal charge obtaining was confirmed by X-ray diffraction method. A single crystal with uniform composition was obtained by Czochralski method from this charg

Ultrafine fibers on the basis of biopolymer polyhydroxybutyrate (PHB) modified with nanosized modifications of titanium dioxide

The technological characteristics of spinning polymer solutions (viscosity, conductivity) and the parameters of the EPI - a process based on poly-3-hydroxybutyrate modified with nanoscale titanium dioxide were optimized. The composite materials were studied by X-ray diffraction, differential scanning calorimetry, infrared spectroscopy and physico-mechanical analysis (tensile test, elongation). A significant improvement in their physical and mechanical properties (breaking length, elongation) and resistance to the maturing were found