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Information × Registration Number 0304U004187, 0103U004192 , R & D reports Title Physical and functional properties of new and modifiсied bioactive materials on the basis of phosphates of calcium popup.stage_title СИНТЕЗ ПОРОШКУ ФОСФАТІВ КАЛЬЦІЮ ТА ВИГОТОВЛЕННЯ ЕКСПЕРИМЕНТАЛЬНИХ КЕРАМІЧНИХ ЗРАЗКІВ НА ЙОГО ОСНОВІ Head Zyman Z.Z., Registration Date 26-03-2004 Organization Kharkov National University named after V.N.Karazin popup.description2 The object of research - hydroxyapatite powders with different crystal form and processes of sintering of products from them.The purpose of work - development of technique of hydroxyapatite powders with the different crystals form obtaining and products with the best mechanical properties prepare .Methods of research - X-ray analysis, infra-red spectroscopy, optical and electronic microscopy. The technique of initial hydroxyapatite powders obtaining with different crystals form is advanced. It shown, that at pH ~ 10 - 12 maitaining by ammonia, powders with spherical form crystals with 0,06 microns average size were sinthesied at temperature of 20 C , and crystals by 0,05 microns diameter and 0,2 microns length were sinthesied at temperature 70 C. Crystals of only spherical form grows at pH ~ 10 - 12 maitain by alkaly . Established, that temperature of intensive strinking of products made from powders, obtained at 20 C, begins at 400 C, and highly- temperature sintering begins at 800 C.For powders obtained at more high synthesis temperature the strinking and sintering practically coincide 850 -900 C. Product Description popup.authors popup.nrat_date 2020-04-02 Close