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0410U000301,
к.х.н.
22-01-2010
o
Systems Tl-Sn(Pb)-S(Sе, Те): phases equilibria, single crystals growth of the ternary compounds and their properties.
Malakhovska-Rosoha Tetуana Оleksandrivna,
popup.head Peresh Yevgen Yuliyovich
popup.opponent Томашик Василь Миколайович
popup.opponent Парасюк Олег Васильович
Дисертація містить результати дослідження фазових рівноваг квазібінарних та ізотермічних перерізів потрійних систем Tl-Sn-S та Tl-Sn-Sе при 363 та 433 К відповідно, уточнення характеру фізико-хімічної взаємодії у системах: Tl2S(Se, Te)-SnS(Se, Te), Tl2Se(Te)-PbSe(Te) та TlSе-SnSе. Побудовано відповідні діаграми стану. Розроблено близькі до оптимальних технологічні умови вирощування монокристалів сполук Tl4SnS3(Sе3, Tе3), Tl4PbSе3(Те3), Tl4SnS4, Tl2SnS3, вивчено їх термоелектричні властивості. Методом монокристалу розшифрована кристалічна структура сполуки Tl4PbSe3. Розглянуто закономірності зміни властивостей у взаємозв'язку з кристалічною структурою, типом хімічного зв'язку, явищем поляризації та іншими факторами при ізовалентних замінах у сполуках Tl4SnS3(Sе3, Tе3), Tl4PbSе3(Те3) Sn на Pb та S на Sе на Те, наведено відповідну інтерпретацію. Кристали сполук Tl4SnS3, Tl4PbSе3 і Tl4SnS4 рекомендовано для використання в якості робочих елементів термоелектричних пристроїв.
2010-01-22
2020-04-04
Updated: 2025-12-07
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