Method for preparing nano barium strontium titanate/magnesium oxide complex-phase powder in situ by coprecipitation

Method for preparing nano barium strontium titanate/magnesium oxide complex-phase powder in situ by coprecipitation

  • CN 104,311,003 A
  • Filed: 10/16/2014
  • Published: 01/28/2015
  • Est. Priority Date: 10/16/2014
  • Status: Active Application
First Claim
Patent Images

1. co-precipitation original position prepares nanometer (1- x) Ba 1- nsr ntiO 3- xmgO complex phase powder method, 0<

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    1, preparation process is as follows;

    By the mol ratio of Ba, Sr, Mg in chemical formula, the nitrate raw material of Ba, Sr, Mg is dissolved in deionized water, the nitrate raw material of Ba, Sr, Mg and be mol/L=1;

    0.5-5 with the solid-liquid ratio of deionized water, preparation solution A;

    Be dissolved in by oxalic acid in ethanolic soln, oxalic acid and ethanolic soln are than being mol/L=1;

    1-5, preparation oxalic acid-ethanolic soln;

    Be dissolved in by butyl (tetra) titanate in the obtained oxalic acid-ethanolic soln of step (2), the mol ratio of butyl (tetra) titanate and oxalic acid is 1;

    2, preparation B solution;

    B solution obtained with step (3) for solution A obtained for step (1) is mixed, stirs, then slowly adds ammoniacal liquor and regulate its pH=2 ~ 10, obtain (1- x) Ba 1- nsr ntiO 3- xmgO precursor solution, 0<

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    1;

    The presoma that step (4) is obtained carries out coprecipitation reaction 48h, then through suction filtration, distilled water and ethanolic soln repetitive scrubbing, is placed in baking oven 70 ~ 150 oevaporate to dryness at C temperature;

    By the throw out of step (5) evaporate to dryness through 400 ~ 900 oc thermal treatment 2-8 h obtains (1- x) Ba 1- nsr ntiO 3- xmgO powder.

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