| 简介 |
FIELD : manufacturing technology.
SUBSTANCE : invention relates to the technology of obtaining compounds of complex oxides with a garnet structure containing rare-earth elements, which can be used in the technology of synthesis of optical ceramic materials of laser quality when creating active bodies of solid-state lasers of different geometries. Method of obtaining a small agglomerated nano-sized precursor for synthesis of solid solutions of yttrium-aluminum garnet with oxides of rare-earth elements (REE) involves preparation of a mother solution of salt cations of specified composition, based on formula (Y1-xREEx)3Al5O12, where x is fraction of rare-earth element cation or sum of fractions of REE cations introduced into yttrium-aluminum garnet and substituting yttrium cations by dissolving chlorides or sulphates of yttrium, aluminum and rare-earth metals in water with subsequent evaporation to reduction of initial volume by 2 times, at solution temperature of 125 °C; dispersion of obtained mother solutions in mixture of aqueous ammonia solution with 25 % concentration and hydrogen peroxide of 30–40 % concentration in ratio of volumes of ammonia solution : solution of hydrogen peroxide (6–2) : 1 with subsequent cooling to 0 °C of obtained precipitate, which is decanted in deionised water to pH=7 and then 2–3 portions of hydrogen peroxide of 30–40 % concentration, wherein the last stage of decantation and washing is carried out with hydrogen peroxide of the same concentration, followed by drying in a vacuum drying cabinet at temperature of 60–80 °C.
EFFECT : method of producing less agglomerated nano-sized precursor powders is simple, as a result of its use, the time for obtaining the end product is reduced, homogeneity and fineness of the obtained product is increased.
1 cl, 7 dwg, 1 tbl, 5 ex |
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