Preparation method of Ba(0.9-x)Sr0.1MgxTiO3 temperature-stable lead-free ceramic
A temperature-stable, ceramic preparation technology, applied in the field of functional ceramics, can solve the problems of limited application range, poor temperature stability, and achieve the effect of ensuring temperature stability, high dielectric constant, and uniform grains
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[0030] Example one
[0031] Step 1: Add the first KOH solution with a concentration of 4mol / L to Sr(NO 3 ) 2 Mixed in the solution to obtain a mixed solution A, in the mixed solution A, Sr(NO 3 ) 2 : The molar ratio of KOH is 1:1.2; at the same time, TiCl 4 Add dropwise the second KOH solution with a concentration of 5mol / L, and mix well to obtain mixed solution B. In mixed solution B, TiCl 4 : The molar ratio of KOH is 1:4; press Sr(NO 3 ) 2 And TiCl 4 The molar ratio of is 1:0.8, take mixed solution A and mixed solution B and mix, stir evenly to obtain SrTiO 3 Precursor solution;
[0032] Step 2: Put TiCl 4 Add BaCl drop by drop 2 Mix evenly in the solution, where BaCl 2 And TiCl 4 The molar ratio is 1:0.6 to obtain mixed solution C; then KOH is added to mixed solution C, in which BaCl 2 The molar ratio with KOH is 1:5, and BaTiO is obtained 3 Precursor solution;
[0033] Step 3: The SrTiO prepared in step 1 3 Precursor solution and BaTiO prepared in step 2 3 Mix the precursor solut...
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[0035] Example two
[0036] Step 1: Add the first KOH solution with a concentration of 4.9mol / L to Sr(NO 3 ) 2 Mixed in the solution to obtain a mixed solution A, in the mixed solution A, Sr(NO 3 ) 2 : The molar ratio of KOH is 1:1.4; at the same time, TiCl 4 Add the second KOH solution with a concentration of 4.9 mol / L drop by drop, and mix well to obtain mixed solution B. In mixed solution B, TiCl 4 : The molar ratio of KOH is 1:3.5; press Sr(NO 3 ) 2 And TiCl 4 The molar ratio of is 1:0.9, take mixed solution A and mixed solution B and mix, stir evenly to obtain SrTiO 3 Precursor solution;
[0037] Step 2: Put TiCl 4 Add BaCl drop by drop 2 Mix evenly in the solution, where BaCl 2 And TiCl 4 The molar ratio is 1:0.7 to obtain mixed solution C; then KOH is added to mixed solution C, in which BaCl 2 The molar ratio with KOH is 1:6 to obtain BaTiO 3 Precursor solution;
[0038] Step 3: The SrTiO prepared in step 1 3 Precursor solution and BaTiO prepared in step 2 3 Mix the precursor s...
Example Embodiment
[0040] Example three
[0041] Step 1: Add the first KOH solution with a concentration of 4.2mol / L to Sr(NO 3 ) 2 Mixed in the solution to obtain a mixed solution A, in the mixed solution A, Sr(NO 3 ) 2 : The molar ratio of KOH is 1:1; at the same time TiCl 4 Add the second KOH solution with a concentration of 4.5 mol / L dropwise and mix well to obtain mixed solution B. In mixed solution B, TiCl 4 : The molar ratio of KOH is 1:3; press Sr(NO 3 ) 2 And TiCl 4 The molar ratio is 1:1.1, take mixed solution A and mixed solution B and mix, stir evenly to obtain SrTiO 3 Precursor solution
[0042] Step 2: Put TiCl 4 Add BaCl drop by drop 2 Mix evenly in the solution, where BaCl 2 And TiCl 4 The molar ratio is 1:0.8 to obtain mixed solution C; then KOH is added to mixed solution C, in which BaCl 2 The molar ratio with KOH is 1:7 to obtain BaTiO 3 Precursor solution
[0043] Step 3: The SrTiO prepared in step 1 3 Precursor solution and BaTiO prepared in step 2 3 Mix the precursor solution, stir...
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