A kind of preparation method of self-doped strontium titanate ferroelectric thin film
A ferroelectric thin film, strontium titanate technology, applied in the field of functional materials, can solve the problems of high cost, complex synthesis, low phase transition temperature, etc., and achieve the effect of simple method
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Embodiment 1
[0023] A method for preparing a self-doped strontium titanate ferroelectric thin film, comprising the following steps: step 1, weighing strontium acetate, butyl titanate and acetylacetone respectively at a molar ratio of 1:1.015:0.7, for use;
[0024] Step 2, all the strontium acetate weighed in step 1 is dissolved in acetic acid with a purity of 99.5%, after forming a transparent and colorless solution, an appropriate amount of ethylene glycol methyl ether is added to make the molar concentration of strontium acetate in the solution reach 0.4mol / L, Stir for 1 h to form solution A, add the weighed butyl titanate to solution A, stir for 30 min to form solution B, for use;
[0025] Step 3, add the acetylacetone weighed in step 1 into solution B, then add an appropriate amount of ethylene glycol methyl ether to dilute solution B until the molar concentration of strontium acetate reaches 0.3mol / L, stir for 6 to 8 hours, filter Remove the impurity produced because of fine dust etc....
Embodiment 2
[0030] A method for preparing a self-doping strontium titanate ferroelectric thin film, comprising the following steps: step 1, respectively weighing strontium acetate, butyl titanate and acetylacetone in a molar ratio of 1:1.02:0.7, for use;
[0031] Step 2, all the strontium acetate weighed in step 1 is dissolved in acetic acid with a purity of 99.5%, after forming a transparent and colorless solution, an appropriate amount of ethylene glycol methyl ether is added to make the molar concentration of strontium acetate in the solution reach 0.4mol / L, Stir for 1 h to form solution A, add the weighed butyl titanate to solution A, stir for 30 min to form solution B, for use;
[0032] Step 3, add the acetylacetone weighed in step 1 into solution B, then add an appropriate amount of ethylene glycol methyl ether to dilute solution B until the molar concentration of strontium acetate reaches 0.3mol / L, stir for 6 to 8 hours, filter Remove the impurity produced because of fine dust etc....
Embodiment 3
[0035] A method for preparing a self-doped strontium titanate ferroelectric thin film, comprising the following steps: step 1, weighing strontium acetate, butyl titanate and acetylacetone respectively at a molar ratio of 1:1.017:0.7, for use;
[0036] Step 2, all the strontium acetate weighed in step 1 is dissolved in acetic acid with a purity of 99.5%, after forming a transparent and colorless solution, an appropriate amount of ethylene glycol methyl ether is added to make the molar concentration of strontium acetate in the solution reach 0.4mol / L, Stir for 1 h to form solution A, add the weighed butyl titanate to solution A, stir for 30 min to form solution B, for use;
[0037] Step 3, add the acetylacetone weighed in step 1 into solution B, then add an appropriate amount of ethylene glycol methyl ether to dilute solution B until the molar concentration of strontium acetate reaches 0.3mol / L, stir for 6 to 8 hours, filter Remove the impurity produced because of fine dust etc....
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