Yaroslavl, Yaroslavl, Russian Federation
Yaroslavl, Yaroslavl, Russian Federation
Yaroslavl, Yaroslavl, Russian Federation
Yaroslavl, Yaroslavl, Russian Federation
Yaroslavl, Yaroslavl, Russian Federation
UDK 546.723 Трехвалентное железо
S cel'yu vyyasneniya mehanizma zaryadovoy kompensacii i sposoba razmescheniya legiruyuschih dobavok byli sintezirovany obrazcy βʺ-poliferritov kaliya s shirokim diapazonom mol'noy doli vvodimyh dvuhzaryadnyh kationov. Dlya dannyh obrazcov izmeryali elektronnuyu provodimost', kationnuyu provodimost', provodili rentgenofazovyy analiz (RFA). Vyyavlen mehanizm zaryadovoy kompensacii v β″-poliferrite kaliya pri legirovanii dvuhzaryadnymi ionami kal'ciya, stronciya, magniya, cinka. Mehanizmy zaryadovoy kompensacii razlichayutsya v zavisimosti ot radiusa vvodimogo dvuhzaryadnogo iona. Rezul'taty izmereniya kationnoy provodimosti β″-poliferritov kaliya pokazali, chto krupnye kationy kal'ciya i stronciya snizhayut podvizhnost' ionov kaliya. Takie dobavki ne tol'ko perspektivny dlya povysheniya mehanicheskoy prochnosti i termostabil'nosti granul katalizatora, no i uvelichivayut himicheskuyu ustoychivost' granul kontakta. Korrozionnaya stoykost' granul yavlyaetsya kriticheskim parametrom, opredelyayuschim srok effektivnogo funkcionirovaniya katalizatora. Dannye po elektronnoy provodimosti pozvolyayut zaklyuchit', chto vnedrenie kationov Mg2+, Zn2+ rezko snizhaet elektronnyy obmen v strukture β″-poliferrita kaliya, chto neizbezhno dolzhno privesti k dezaktivacii katalizatora, v to vremya kak iony Sa2+ i Sr2+ ne snizhayut skorost' perenosa elektronov. Ispol'zovanie predlagaemogo podhoda pozvolit intensificirovat' issledovatel'skiy process.
poliferrit, promotor, dvuhzaryadnyy kation, zaryadovaya kompensaciya, elektronnaya provodimost', kationnaya provodimost', zhelezooksidnyy katalizator
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