Method for preparing flaky BaTiO3 micro-crystal by two-step molten salt method
A technology of microcrystalline and molten salt method, applied in chemical instruments and methods, alkaline earth metal titanates, inorganic chemistry, etc., to achieve the effects of good repeatability, wide application range and low price
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Embodiment 1
[0030] 1. Raw material: Analytical pure BaCO 3 , anatase phase TiO 2 ; Molten salt additive NaCl / KCl.
[0031] 2. Follow the steps below to prepare flaky BaTiO 3 Microcrystalline
[0032] 1). The above raw materials and molten salt additives, BaCO 3 : TiO 2 : NaCl: KCl is mixed in a molar ratio of 6.6:17:170:170;
[0033] 2). Manually grind the mixture in step 1) for 30 minutes;
[0034] 3). Put the mixture obtained in step 2) into a corundum crucible, and keep it in a muffle furnace at 1000° C. for 5 hours;
[0035] 4). After cooling the mixture of product A and molten salt in step 3) with the furnace, wash it with deionized water several times, collect it by centrifugation, and wash it with 0.1mol / L AgNO 3 The solution was detected until Cl could not be found - ion, dried in an oven at 100°C for 6-12 hours to obtain white Ba 6 Ti 17 o 40 flaky products;
[0036] Ba 6 Ti 17 o 40 The XRD pattern of the flake product is shown in figure 1 , SEM image see figure...
Embodiment 2
[0051] 1. Raw material: Analytical pure BaCO 3 , anatase phase TiO 2 ; Molten salt additive NaCl / KCl.
[0052] 2. Follow the steps below to prepare flaky BaTiO 3 Microcrystalline
[0053] 1). The above raw materials and molten salt additives, BaCO 3 : TiO 2 : NaCl: KCl is mixed in a molar ratio of 6.6:17:170:170;
[0054] 2). Manually grind the mixture in step 1) for 30 minutes;
[0055] 3). The mixture obtained in step 2) was placed in a corundum crucible, and kept in a muffle furnace at 1000° C. for 5 hours.
[0056] 4). After cooling the mixture of product A and molten salt in step 3) with the furnace, wash it with deionized water several times, collect it by centrifugation, and wash it with 0.1mol / L AgNO 3 The solution was detected until Cl could not be found - ion, dried in an oven at 100°C for 6-12 hours to obtain white Ba 6 Ti 17 o 40 Flaky product.
[0057] 5). Combine the following raw materials with molten salt additive Ba 6 Ti 17 o 40 : BaCO 3 : NaCl...
Embodiment 3
[0063] 1. Raw material: Analytical pure BaCO 3 , anatase phase TiO 2 ; Molten salt additive NaCl / KCl.
[0064] 2. Follow the steps below to prepare flaky BaTiO 3 Microcrystalline
[0065] 1). The above raw materials and molten salt additives, BaCO 3 : TiO 2 : NaCl: KCl is mixed in a molar ratio of 6.6:17:170:170;
[0066] 2). Manually grind the mixture in step 1) for 30 minutes;
[0067] 3). The mixture obtained in step 2) was placed in a corundum crucible, and kept in a muffle furnace at 1000° C. for 5 hours.
[0068] 4). After cooling the mixture of product A and molten salt in step 3) with the furnace, wash it with deionized water several times, collect it by centrifugation, and wash it with 0.1mol / L AgNO 3 The solution was detected until Cl could not be found - ion, dried in an oven at 100°C for 6-12 hours to obtain white Ba 6 Ti 17 o 40 Flaky product.
[0069] 5). Combine the following raw materials with molten salt additive Ba 6 Ti 17 o 40 : BaCO 3 : NaCl...
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