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Information × Registration Number 0213U002417, 0112U002705 , R & D reports Title Silicates of rare earth and alkali elements with the apatite structure and modified lead zirconate titanate. popup.stage_title Head Get'man Evgeniy Ivanovich, Registration Date 28-01-2013 Organization Donetsk National University popup.description2 The conditions of the synthesis by solid-state method and by sol-gel method of mixture silicates with the structure of apatite - La(9-x)Eu(Nd)x(SiO4)6O(OH) (x = 0 - 9), NaNd9(SiO4)6O2, and - NaEu9(SiO4)6O2 have been established. The solid solutions with substitution of lanthanum with europium (neodymium) for all values of x have obtained at 1200oC. Sodium silicates and REE were synthesized at 1100oC. The phase composition, unit cell parameters, refined crystal structure by the Rietveld method, installed position of substitute cations, interatomic distances, - the content and distribution of elements by SEM of obtained compounds were determined. It has shown that the structure of the europium atoms NaEu9(SiO4)6O2 are taking place in seven vertex polyhedron (position 6h), europium and sodium atoms occupy nine vertex polyhedron (position 4f). The oxygen atoms O(4) are located in the channels of the structure in the center of Eu(2) triangle. The presence of suffi-ciently large distances Ln-Ln indicates the possible existence of fluorescent properties. Conductivity of NaLn9(SiO4)6O2 was measured in the temperature range of 320-750oC, its value is not inferior to some of the lanthanum silicate containing no sodium. Date bank of isomorphous substitution, supplemented systems of lead-sodium-rare earth elements phosphates with apatite structure. Ceramics, based on PZT, modified additions of strontium, iron, fluorine, manganese, bismuth, magnesium, niobium, have been obtained by usual ceramic technology using mechanochemi-cal activation in conjunction with the optimal process conditions. The test material has high piezoelectric properties and low dielectric losses, which are vary slightly changed at higher temperatures and electric field strength. Product Description popup.authors Ігнатов Олексій Володимирович Клімов Всеволод Валентинович Пасічник Людмила Валентинівна Понуровський Віталій Сергійович Селікова Неля Іванівна popup.nrat_date 2020-04-02 Close