Preparation method of barium sodium niobate cylindrical monocrystal particle
A single crystal particle, barium sodium niobate technology, applied in the direction of single crystal growth, single crystal growth, chemical instruments and methods, etc., can solve the problems of unsatisfactory performance and difficult to control components accurately, and achieve uniform size, Ease of large-scale production and high efficiency
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Embodiment 1
[0016] Embodiment one: the component of the sodium barium niobate of design is Ba 2 NaNb 5 o 15 . Weigh high-purity BaCO with a molar ratio of 1:1 according to the components 3 with Nb 2 o 5 As raw material, its purity is 99.999%, namely BaCO 3 4.2608 g, Nb 2 o 5 5.7392 grams, put the two into an agate jar equipped with agate balls, use absolute alcohol as the medium, ball mill for 2 to 3 hours, then add 20 grams of NaCl salt according to the ratio of salt to material ratio 2:1, and then ball mill 2 to 3 hours to make the mixture even, then dry and sieve.
[0017] The above-mentioned dried and mixed raw materials were put into an alumina crucible, and after sealing, the temperature was raised to 1200°C at a rate of 200°C / h, and calcined for 4 hours. The synthesized product was cooled to room temperature with the furnace.
[0018] The synthesized product was rinsed 10 times in distilled water to remove residual molten salt, and finally obtained barium sodium niobate s...
Embodiment 2
[0021] Embodiment 2: The process steps of this embodiment are exactly the same as those of the above-mentioned embodiment 1, and high-purity BaCO is still used 3 with Nb 2 o 5 As raw material, its molar ratio is 1:1, the difference is that the ratio of salt to material is changed to 1:1. That is, 10 grams of NaCl salt was added, and the synthesized product was determined to be single-phase sodium barium niobate by XRD. Compared with the synthetic material in Example 1, this synthetic powder has a smaller aspect ratio, with a diameter of 1-3 μm and an aspect ratio of 2-4.
Embodiment 3
[0022] Embodiment 3: The process steps of this embodiment are exactly the same as those of the above-mentioned embodiment 1, the difference is that the ratio of salt to material is changed to 4:1. That is, 40 grams of NaCl salt was added, and the composite was determined to be single-phase sodium barium niobate by XRD. Observed by scanning electron microscope, it is columnar crystal grains, the distribution is relatively uniform, and the crystal grains are relatively coarse, with a diameter of 6-8 μm and an aspect ratio of 2-5.
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