Method of preparing Bi3TiNbO9 micro-nano piezoelectricity ferro-electricity powder
A micro-nano, piezoelectric technology
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Embodiment 1
[0013] (1) Nb 2 o 5 Dissolve in 40% HF at 80-90°C, then drop NH into it 3 ·H 2 O solution to pH 8.5-9.5, forming white Nb(OH) 5 Precipitate, aging at room temperature for 10 hours, the precipitate was filtered, washed and dissolved in citric acid aqueous solution, citric acid and Nb 2 o 5 The molar ratio of is 8: 1, forms transparent Nb-citric acid solution;
[0014] (2) According to the molar ratio Nb 5+ : Ti 4+ : Bi 3+ :EDTA=1:1:3:3.3 and NH 4 NO 3 : The ratio of citric acid=6:1 will Ti(C 4 h 9 O) 4 , Bi(NO 3 ) 3 ·5H 2 O, EDTA and NH 4 NO 3 Sequentially added to the Nb-citric acid solution prepared in step (1) to form a transparent solution, heated and stirred at 95-105°C to obtain a light yellow precursor gel;
[0015] (3) Sinter the precursor gel at 480°C for 50 minutes to obtain Bi 3 TiNbO 9 Nano powder material.
[0016] (4) will get Bi 3 TiNbO 9 Nanoparticles were annealed at 550°C for 6 hours to obtain Bi 3 TiNbO 9 Powder.
Embodiment 2
[0018] (1) Nb 2 o 5 Dissolve in 40% HF at 80-90°C, then drop NH into it 3 ·H 2 O solution to pH 8.5-9.5, forming white Nb(OH) 5 Precipitate, aging at room temperature for 10 hours, the precipitate was filtered, washed and dissolved in citric acid aqueous solution, citric acid and Nb 2 o 5 The molar ratio of is 12: 1, forms transparent Nb-citric acid solution;
[0019] (2) According to the molar ratio Nb 5+ : Ti 4+ : Bi 3+ :EDTA=1:1:3:3.3 and NH 4 NO 3 : The ratio of citric acid=5:1 will Ti(C 4 h 9 O) 4 , Bi(NO 3 ) 3 ·5H 2 O, EDTA and NH 4 NO 3 Sequentially added to the Nb-citric acid solution prepared in step (1) to form a transparent solution, heated and stirred at 95-105°C to obtain a light yellow precursor gel;
[0020] (3) Sinter the precursor gel at 600°C for 15 minutes to obtain Bi 3 TiNbO 9 Nano powder material.
[0021] (4) will get Bi 3 TiNbO 9 Nanoparticles were annealed at 650°C for 30 hours to obtain Bi with a particle size distribution of 12...
Embodiment 3
[0023] (1) Nb 2 o 5 Dissolve in 40% HF at 80-90°C, then drop NH into it 3 ·H 2 O solution to pH 8.5-9.5, forming white Nb(OH) 5 Precipitate, aging at room temperature for 12 hours, the precipitate was filtered, washed and dissolved in citric acid aqueous solution, citric acid and Nb 2 o 5 The molar ratio of is 16: 1, forms transparent Nb-citric acid solution;
[0024] (2) According to the molar ratio Nb 5+ : Ti 4+ : Bi 3+ :EDTA=1:1:3:3.6 and NH 4NO 3 : The ratio of citric acid=5:1 will Ti(C 4 h 9 O) 4 , Bi(NO 3 ) 3 ·5H 2 O, EDTA and NH 4 NO 3 Sequentially added to the Nb-citric acid solution prepared in step (1) to form a transparent solution, heated and stirred at 95-105°C to obtain a light yellow precursor gel;
[0025] (3) Sinter the precursor gel at 700°C for 10 minutes to obtain Bi 3 TiNbO 9 Nano powder material.
[0026] (4) will get Bi 3 TiNbO 9 Nanoparticles were annealed at 700°C for 40 hours to obtain Bi with a particle size distribution of 200...
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