Textured (1-x-y) BNT-xBKT-yKNN ceramic material and preparation method thereof
A 1-x-y, ceramic material technology, applied in the field of textured BNT-xBKT-yKNN ceramic material and its preparation, can solve the problem that the piezoelectric performance has not been fundamentally improved, and achieve the promotion of application progress and preparation cost The effect of low and good application prospects
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Embodiment 1
[0042] A bismuth titanate template was prepared at a template growth temperature of 1000°C.
[0043] Weigh 11.356g Bi 2 o 3 Powder, 2.607g TiO 2 Powder, then weigh 15.358g NaCl powder, mix and ball mill all the powder with absolute ethanol for 24 hours, dry the mixed material, put it into an alumina crucible and put it in a furnace at 1000°C for 2 hours, After cooling, put it into a Buchner funnel, wash the NaCl with deionized water, and dry to obtain a bismuth titanate template.
[0044] figure 1 It shows that the prepared bismuth titanate has an obvious sheet structure, and the size of most of the sheets reaches more than 10 microns, indicating that the temperature of 1000 ° C makes the template grow more fully.
[0045] figure 2 It shows that the phase of the synthesized sheet-like template material is a single bismuth titanate phase, and the obtained template is a pure bismuth titanate template.
Embodiment 2
[0047] A textured 79BNT-20BKT-1KNN ceramic with a template content of 5% was prepared.
[0048] Weigh 1g of the bismuth titanate template prepared in Example 1 and 19g of 79BNT-20BKT-1KNN base material, add 9.6g of toluene and 8.0g of absolute ethanol for roller milling for 12 hours, then add 6g of binder and continue roller milling for 3 hours to obtain a slurry material; take out the prepared slurry, and use a casting scraper to cast on a glass plate, and the height of the scraper is 100 μm; after casting and standing for 0.5 hours, scrape the film from the glass plate; After cutting into square pieces of 11mm*11mm, the lamination is hot-pressed at 50°C, and the hot-pressing pressure is 20Mpa; the formed green body is debonded at 550°C and sintered at 1180°C to obtain textured 79BNT-20BKT-1KNN Ceramic material, its texture degree is 70%.
[0049] The obtained ceramic material sample was ground into a thin slice with a thickness of 0.45 mm, and Ag electrodes were placed on t...
Embodiment 3
[0054] A textured 79BNT-20BKT-1KNN ceramic with a template content of 20% was prepared.
[0055] Weigh 4g of the bismuth titanate template prepared in Example 1 and 16g of 79BNT-20BKT-1KNN base material, add 9.6g of toluene and 8.0g of absolute ethanol to roll mill for 12 hours, add 6g of binder and continue to roll mill for 3 hours to obtain a slurry material; take out the prepared slurry, use a casting scraper to cast on a glass plate, and the height of the scraper is 100 μm; after casting and let it stand for 0.5 hours, scrape the film from the glass plate; After cutting into square pieces of 11mm*11mm, the lamination is hot-pressed at 50°C, and the hot-pressing pressure is 20Mpa; the formed green body is debonded at 550°C and sintered at 1180°C to obtain textured 79BNT-20BKT-1KNN Ceramic material, its texture degree is 94%.
[0056] The obtained ceramic material sample is ground into a thin slice with a thickness of 0.45 mm, Ag electrodes are placed on the upper and lower...
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