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Journal articles on the topic 'Bismuth titanate'

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Published: 4 June 2021
Last updated: 7 February 2022

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1

Lazarević, Z. Ž., N. Ž. Romčević, M. J. Romčević, and B. D. Stojanović. "Raman Spectra of Bismuth Titanate Ceramics." Materials Science Forum 555 (September 2007): 243–47. http://dx.doi.org/10.4028/www.scientific.net/msf.555.243.

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Bismuth titanate is a typical layer-structured ferroelectric material and belongs to the Aurivilius type-structure compounds family. A bismuth titanate ceramic material could be obtained by mechanically activated synthesis after thermal treatment at a temperature slightly lower than in conventional solid-state reaction. In this case bismuth titanate was prepared through mechanochemical synthesis starting from bismuth oxide and titanium oxide in rutile form. The mixture of oxides was milled in a zirconium oxide jar in a planetary ball-mill in intervals from 1 to 12 hours. The ratio of powders to zirconium oxide balls during milling was 1:20. Bismuth titanate was formed after 1 h. The Raman spectroscopy analysis was performed.
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2

Lazarevic, Z., B. D. Stojanovic, and J. A. Varela. "An approach to analyzing synthesis, structure and properties of bismuth titanate ceramics." Science of Sintering 37, no. 3 (2005): 199–216. http://dx.doi.org/10.2298/sos0503199l.

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The family of bismuth titanate, Bi4Ti3O12 (BIT) layered-structured ferroelectrics materials is attractive from the viewpoint of their application as electronic materials such as dielectrics, piezoelectrics and pyroelectrics, because they are characterized by good stability of piezoelectric properties, a high Curie temperature and a good resistance vs temperature. Bismuth titanate (Bi4Ti3O12) powders can be prepared using different methods, depending if the creation will be film coating or ceramics. The structure and properties of bismuth titanate materials show a significance dependence on the applied synthesis method. In this review paper, we made an attempt to give an approach to analyzing the structure, synthesis methods and properties of bismuth titanate ferroelectrics materials. .
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3

Wang, En Guo, and Mei Xiang Huo. "The Photocatalytic Behavior of Bismuth Titanate Powders Prepared by the Citric-Combustion Method." Advanced Materials Research 726-731 (August 2013): 483–86. http://dx.doi.org/10.4028/www.scientific.net/amr.726-731.483.

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Bismuth titanate powders have been prepared by the citric-combustion method using bismuth nitrate and tetrabutyl titanate as the starting materials, and the effect of sintering temperature and the ratio of bismuth to titanium on their structure and photocatalytic activity was studied. The powders were characterized by X-ray diffractometry (XRD) and scanning electron microscopy (SEM). The photocatalytic properties of the samples were probed by using the methyl blue as simulated contaminants. The results showed that bismuth titanate powder prepared at 873K has the best photocatalytic activity.
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4

Inaba, Katsuya, Ichiro Fujii, Kouichi Nakashima, Hiroshi Hayashi, Yuichi Yamamoto, Yoshihiro Kuroiwa, and Satoshi Wada. "Preparation of Grain-Oriented Ceramics with Bismuth Potassium Titanate-Barium Titanate and their Piezoelectric Properties." Key Engineering Materials 582 (September 2013): 80–83. http://dx.doi.org/10.4028/www.scientific.net/kem.582.80.

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Bismuth potassium titanate ((Bi1/2K1/2)TiO3: BKT) powder were prepared using bismuth oxide (Bi2O3), potassium hydrogen carbonate (KHCO3) and titanium oxide (TiO2) raw materials. Barium titanate (BaTiO3: BT) platelike particles oriented along [110] direction were used as template particles. Barium titanate-bismuth potassium titanate (BT-BKT) ceramics had a tetragonal phase at -100 °C. The main composition was fixed to BKT 30 molar% because the Curie temperature (TC) was well above 200 °C at BKT 30 molar%. The orientation of [110]-oriented BT-BKT ceramics (BKT 30 molar%) was 54.6 %.
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5

Pookmanee, Pusit, and Sukon Phanichphant. "Characterization of Bismuth Titanate Powders." Advanced Materials Research 26-28 (October 2007): 247–50. http://dx.doi.org/10.4028/www.scientific.net/amr.26-28.247.

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Bismuth titanate was prepared from the sol-gel method. Bismuth nitrate and titanium isopropoxide were used as the starting precursors with the mole ratio of Bi:Ti as 4:3. Solutions were mixed in acetic acid medium and heat at 80 oC for 2h. Sols were obtained after adjusting the final of pH of solution to 2. Gels were formed after drying at 100 oC for 24h. The milled powders were calcined at 500-800 oC for 2h. The phase formation was investigated by X-ray diffractometry (XRD). Single phase with orthorhombic structure of bismuth titanate was obtained after calcination at 700 oC for 2h. The morphology and chemical composition were studied by scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS). The average particle size was 0.50- 1.5 μm with the irregular shape. The elemental composition of bismuth, titanium and oxygen showed the characteristic X-ray energy values.
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6

Yong, Shih Ween, Hartini Khairi Osman, Pei Wen Koh, and Siew Ling Lee. "Temperature Effect on Phase Formation of Nanocrystalline Bismuth Titanate Synthesized via Hot Injection Method." Advanced Materials Research 287-290 (July 2011): 257–60. http://dx.doi.org/10.4028/www.scientific.net/amr.287-290.257.

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Nanocrystalline bismuth titanate materials were synthesized via hot injection method for the first time. Bismuth nitrate and titanium butoxide were used as precursors of Bi and Ti, respectively. The synthesis method was modified to use aqueous solution as the solvent instead of non coordinating solvent which enable production of nanosized compounds at lower reaction temperature. During the synthesis process, titanium precursor was injected into mixture of bismuth nitrate and oleic acid at 130°C, leading to a rapid burst nucleation and followed by nuclei growth at room temperature. The synthesized compound was heated at various temperatures. XRD results showed formation of cubic phase bismuth titanate compound with space group of Fm3m at room temperature after the reaction. Presence of cubic phase bismuth titanate compound with space group of I23 was observed as secondary phase at 300°C. Meanwhile, a single phase cubic form, space group I23 was obtained for material synthesized at 600°C. FESEM images indicated nano particles of bismuth titanate materials were produced at lower temperatures. However, sintering effect was observed in material heated at 600°C, resulting micro-sized particles.
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7

Thongtha, Atthakorn, and Theerachai Bongkarn. "Combustion technique synthesis of lead-free piezoelectric bismuth sodium titanate-bismuth potassium titanate–barium titanate ceramics." Integrated Ferroelectrics 175, no. 1 (August 12, 2016): 102–10. http://dx.doi.org/10.1080/10584587.2016.1202703.

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8

Lazarević, Z. Ž., B. D. Stojanović, and José Arana Varela. "Mechanochemical Synthesis of Bi4Ti3O12." Materials Science Forum 518 (July 2006): 125–30. http://dx.doi.org/10.4028/www.scientific.net/msf.518.125.

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Our efforts were directed to the preparation of bismuth titanate – Bi4Ti3O12 (BIT) by mechanically assisted synthesis. The mechanical activation was applied to prepare bismuth titanate, Bi4Ti3O12, from bismuth oxide, Bi2O3, and titanium oxide, TiO2 (in an anatase crystal form). Mechanochemical synthesis was performed in a planetary ball mill in air atmosphere. Bismuth titanate ceramics was obtained by sintering at 1000 oC. The formation of Bi4Ti3O12 in the sintered samples was confirmed by X-ray diffraction analysis. Scanning electron microscopy, SEM, was used to study the particle size and powder morphology. The obtained results indicate that Bi4Ti3O12 from the powder synthesized by high-energy ball milling exhibits good sinterability, showing advantage of the mechanochemical process over conventional solid-state reaction.
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9

Muanghlua, Rangson, Surasak Niemcharoen, Wanwilai C. Vittayakorn, Nattapong Tungsitvisetkul, Pimjan Chinwaro, Anucha Ruangphanit, Nopsiri Chaiyo, and Naratip Vittayakorn. "Preparation and Properties of Lead Free Bismuth Sodium Titanate−Bismuth Zinc Titanate Ceramics." Ferroelectrics 383, no. 1 (June 30, 2009): 1–7. http://dx.doi.org/10.1080/00150190902873303.

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10

Su, Wei-Fang, Jiann-Fong Lee, Ming-Yao Chen, and Ron-Ming Ho. "Bismuth titanate nanoparticles dispersed polyacrylates." Journal of Materials Research 19, no. 8 (August 2004): 2343–48. http://dx.doi.org/10.1557/jmr.2004.0312.

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We successfully dispersed amorphous bismuth titanate nanoparticles (<50 nm)in situ in poly-hydroxy ethyl methacrylate via a sol-gel process. Since less than 20% of the polymer composition is bismuth titanate by weight, the material exhibits high refractive indices (>1.6) and good optical transparency (>90% transmittance from 530 to 800 nm). Furthermore, this highly cross-linked material has an improved thermal stability and a lower coefficient of thermal expansion than that of neat polymers. The material also displays a high dielectric constant (>10) without ferroelectricity. Thus the material has potential applications in optical lenses, optical waveguides, and capacitors.
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11

Potong, Ruamporn, Rattiyakorn Rianyoi, Athipong Ngamjarurojana, and Arnon Chaipanich. "Acoustic and dielectric properties of 0–3 bismuth sodium titanate-bismuth potassium titanate-barium titanate/cement composites." Ferroelectrics Letters Section 43, no. 4-6 (December 15, 2015): 77–81. http://dx.doi.org/10.1080/07315171.2016.1210469.

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12

Kojima, Seiji, Anwar Hushur, Fuming Jiang, Sinichi Hamazaki, Masaaki Takashige, Min-Su Jang, and Shiro Shimada. "Crystallization of amorphous bismuth titanate." Journal of Non-Crystalline Solids 293-295 (November 2001): 250–54. http://dx.doi.org/10.1016/s0022-3093(01)00828-6.

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13

Shaislamov, Ulugbek, Jun-Mo Yang, and Beelyong Yang. "Lanthanum-substituted bismuth titanate nanotubes." Physica E: Low-dimensional Systems and Nanostructures 44, no. 7-8 (April 2012): 1649–52. http://dx.doi.org/10.1016/j.physe.2012.04.013.

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14

Padmanaban, A., T. Dhanasekaran, S. Praveen Kumar, G. Gnanamoorthy, A. Stephen, and V. Narayanan. "Catalytic activity of Bismuth Titanate." Materials Today: Proceedings 14 (2019): 553–57. http://dx.doi.org/10.1016/j.matpr.2019.04.177.

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15

Xu Guo-Cheng, Pan Ling, Guan Qing-Feng, and Zou Guang-Tian. "Crystallization of amorphous bismuth titanate." Acta Physica Sinica 55, no. 6 (2006): 3080. http://dx.doi.org/10.7498/aps.55.3080.

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16

Ma, Chun Hong, Xue Lin, Liang Wang, and Yong Sheng Yan. "Sol-Gel Synthesis and Characterization of Nanocrystalline Bi4Ti3O12 Powders." Advanced Materials Research 997 (August 2014): 359–62. http://dx.doi.org/10.4028/www.scientific.net/amr.997.359.

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Nanocrystalline bismuth titanate (Bi4Ti3O12; BTO) powders were successfully prepared by the sol-gel method, using bismuth nitrate (Bi(NO3)3·5H2O) and tetrabutyl titanate (Ti(OC4H9)4) as source materials, acetic anhydride and ethanediol as solvents. The thermal decomposition and phase inversion process of the gel precursors were studied by using differential thermal analysis (DTA). The crystal structures and microstructures of BTO powders were investigated by using x-ray diffraction (XRD), and transmission electron microscope (TEM). The crystallization of amorphous bismuth titanate has been discussed. The effect of sintering temperature on the structure and morphology of BTO was investigated. At 644 oC and above, BTO powder undergoes a phase transformation from tetragonal to orthorhombic. At 900 oC, the purified orthorhombic BTO nanocrystals were obtained.
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17

Lazarevic, Z. Z., J. Bobic, N. Z. Romcevic, N. Paunovic, and B. D. Stojanovic. "Study of barium bismuth titanate prepared by mechanochemical synthesis." Science of Sintering 41, no. 3 (2009): 329–35. http://dx.doi.org/10.2298/sos0903329l.

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Barium-bismuth titanate, BaBi4Ti4O15 (BBT), a member of Aurivillius bismuth-based layer-structure perovskites, was prepared from stoichiometric amounts of barium titanate and bismuth titanate obtained via mechanochemical synthesis. Mechanochemical synthesis was performed in air atmosphere in a planetary ball mill. The reaction mechanism of BaBi4Ti4O15 and the preparation and characteristics of BBT ceramic powders were studied using XRD, Raman spectroscopy, particle analysis and SEM. The Bi-layered perovskite structure of BaBi4Ti4O15 ceramic forms at 1100 ?C for 4 h without a pre-calcination step. The microstructure of BaBi4Ti4O15 exhibits plate-like grains typical for the Bi-layered structured material and spherical and polygonal grains. The Ba2+ addition leads to changes in the microstructure development, particularly in the change of the average grain size.
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18

Pavlovic, Nikolina, Dejan Kancko, Mészáros Szécsényi, and Vladimir Srdic. "Synthesis and characterization of Ce and La modified bismuth titanate." Processing and Application of Ceramics 3, no. 1-2 (2009): 88–95. http://dx.doi.org/10.2298/pac0902088p.

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Bismuth titanate based nanopowders with the different content of La or Ce were synthesized by the modified sol-gel method. After calcination at 600?C, in addition to Aurivillius layered structure, a small quantity of cubic pyrochlore phase was detected in the La modified powders, while this second phase was much more pronounced in the Ce substituted powders. In fact, as the powder with the highest amount of Ce (Bi3CeTi3O12) has the pure pyrochlore phase it seems that the presence of Ce stabilizes the formation of this phase. This different influence of cerium and lanthanum could be explained by the incorporation of their ions on the different sites in the titanate structure. Bismuth titanate based ceramics, sintered at 1050?C/2h, had densities above 93% of theoretical density and characteristic plate-like grain morphology. Small quantity of cubic pyrochlore phase was detected only in the Ce modified bismuth titanate ceramics. On the other hand, lanthanum addition caused formation of smaller grain size with pronounced plate-like morphology. .
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19

Potong, Ruamporn, Rattiyakorn Rianyoi, Athipong Ngamjarurojana, and Arnon Chaipanich. "Influence of carbon nanotubes on the performance of bismuth sodium titanate-bismuth potassium titanate-barium titanate ceramic/cement composites." Ceramics International 43 (August 2017): S75—S78. http://dx.doi.org/10.1016/j.ceramint.2017.05.225.

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20

Pavlovic, Nina, Dragan Rajnovic, L. Sidjanin, and Vladimir V. Srdic. "Effect of Cerium and Lanthanum Addition on Mechanical Properties of Bismuth Titanate Ceramics." Key Engineering Materials 409 (March 2009): 330–33. http://dx.doi.org/10.4028/www.scientific.net/kem.409.330.

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Cerium- and lanthanum- substituted bismuth titanate (Bi4-xAxTi3O12; where A=La or Ce, and x=0, 0.5 and 1) ceramics were prepared from nanopowders synthesized by coprecipitation method. The as-synthesized powders were calcined, uniaxially pressed and finally sintered at 1050°C. It was shown that sintering behaviour, phase composition and grain morphology of the obtained ceramics were influenced by the presence of lanthanum and especially cerium ions in the titanate structure. Mechanical properties (hardness and fracture toughness) were measured at room temperature on polished sample surfaces using a Vickers microhardness tester. The hardness values for of bismuth titanate based ceramics were in the range for some other important perovskite titanate, whereas their fracture toughness was somewhat higher.
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21

Jain Ruth, D. E., M. Muneeswaran, N. V. Giridharan, and B. Sundarakannan. "Structural and electrical properties of bismuth magnesium titanate substituted lead-free sodium bismuth titanate ceramics." Journal of Materials Science: Materials in Electronics 27, no. 7 (March 15, 2016): 7018–23. http://dx.doi.org/10.1007/s10854-016-4658-3.

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22

Simon, M., F. Mersch, C. Kuper, S. Mendricks, S. Wevering, J. Imbrock, and E. Krätzig. "Refractive Indices of Photorefractive Bismuth Titanate, Barium-Calcium Titanate, Bismuth Germanium Oxide, and Lead Germanate." physica status solidi (a) 159, no. 2 (February 1997): 559–62. http://dx.doi.org/10.1002/1521-396x(199702)159:2<559::aid-pssa559>3.0.co;2-0.

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23

Islam, Aminul, M. A. Gafur, and Saidul Islam. "Sintering characteristics of La/Nd doped Bi4Ti3O12 bismuth titanate ceramics." Science of Sintering 47, no. 2 (2015): 175–86. http://dx.doi.org/10.2298/sos1502175i.

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A good understanding about the properties of La/Nd doped Bismuth Titanate (BIT) ceramics at high temperature is very important as the new materials being developed based on the BIT. Pure BIT, La doped (BLT), Nd doped (BNT) and La and Nd co-doped BIT (BLNT) powders were synthesized by solid state reaction method. Prepared powders were calcined at different temperatures and structural properties measured by XRD. For pure BIT better crystal quality was obtained at 750 0C and for both BLT and BNT better result obtained at 800 0C. Calcined powders were formed into pellets and sintered at different temperatures and its dielectric properties were characterized. Optimum sintering temperature for both BLT and BNT showed was 850 0C and La and Nd co-doped bismuth titanate (BLNT) revealed optimum sintering temperature of 950 0C. Therefore, optimum sintering temperature of bismuth titanate was increased due to La and Nd doping.
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24

Miao, Hong Yan, Min Dong, Guo Qiang Tan, Yong Ping Pu, and Zheng Qiu Sun. "Hydrothermal Preparation of Bismuth Titanate Nanopowders." Key Engineering Materials 336-338 (April 2007): 161–64. http://dx.doi.org/10.4028/www.scientific.net/kem.336-338.161.

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Bismuth titanate nanopowders were prepared by the hydrothermal method from Bi(NO3)3·5H2O, TiCl4 and KOH aqueous solution. The influences of reaction temperature and KOH concentration on the crystalline phase, morphology, and grain size of the prepared Bi4Ti3O12 powders were investigated. The results showed that well-crystallized, dispersive Bi4Ti3O12 nanopowders could be prepared by the hydrothermal treatment at 220–260°C for 6 h, in the case of [Ti]= 0.1 M, Bi:Ti = 4:3 and [KOH]=1.0–2.0 M. The prepared Bi4Ti3O12 powders of the orthorhombic structure were observed to be rectangle slice-shaped, and the grain sizes were about 30 nm in width and above100 nm in length. It was also confirmed that the desired concentration of KOH decreased with increasing of the treatment temperature.
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25

Wang, Chun-Ming, and Jin-Feng Wang. "Aurivillius Phase Potassium Bismuth Titanate: K0.5Bi4.5Ti4O15." Journal of the American Ceramic Society 91, no. 3 (March 2008): 918–23. http://dx.doi.org/10.1111/j.1551-2916.2007.02211.x.

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26

Du, Hongchu, Sebastian Wohlrab, and Stefan Kaskel. "Synthesis of Nanostructured Bismuth Titanate Microspheres." Journal of Nanoscience and Nanotechnology 6, no. 7 (July 1, 2006): 2110–16. http://dx.doi.org/10.1166/jnn.2006.335.

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27

Meng, Jinfang, Guangtian Zou, Qiliang Cui, and Yianzhang Ma. "Ferroelastic phase transition in bismuth titanate." Physica Status Solidi (a) 144, no. 2 (August 16, 1994): 353–61. http://dx.doi.org/10.1002/pssa.2211440214.

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28

Pookmanee, Pusit, Piyanan Boonphayak, and Sukon Phanichphant. "Chemical synthesis of bismuth titanate microparticles." Ceramics International 30, no. 7 (January 2004): 1917–19. http://dx.doi.org/10.1016/j.ceramint.2003.12.041.

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29

Xu, Huiwen, Keith J. Bowman, and Elliott B. Slamovich. "Hydrothermal Synthesis of Bismuth Titanate Powders." Journal of the American Ceramic Society 86, no. 10 (October 2003): 1815–17. http://dx.doi.org/10.1111/j.1151-2916.2003.tb03564.x.

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30

Yao, W. "Photocatalytic property of bismuth titanate Bi2Ti2O7." Applied Catalysis A: General 259, no. 1 (March 8, 2004): 29–33. http://dx.doi.org/10.1016/j.apcata.2003.09.004.

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31

Yao, Wei Feng, Xiao Hong Xu, Hong Wang, Jing Tao Zhou, Xue Na Yang, Yin Zhang, Shu Xia Shang, and Bai Biao Huang. "Photocatalytic property of perovskite bismuth titanate." Applied Catalysis B: Environmental 52, no. 2 (September 2004): 109–16. http://dx.doi.org/10.1016/j.apcatb.2004.04.002.

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32

Kimura, Toshio, Eiichiro Fukuchi, and Toshihiko Tani. "Fabrication of Textured Bismuth Sodium Titanate Using Excess Bismuth Oxide." Japanese Journal of Applied Physics 44, no. 11 (November 9, 2005): 8055–61. http://dx.doi.org/10.1143/jjap.44.8055.

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33

Mitsui, Ryuta, Ichiro Fujii, Kouichi Nakashima, Nobuhiro Kumada, Takayuki Watanabe, Mikio Shimada, Jumpei Hayashi, et al. "Microstructure and Piezoelectric Properties of BaTiO3-Bi(Mg1/2Ti1/2)O3-BiFeO3 Ceramics." Key Engineering Materials 566 (July 2013): 59–63. http://dx.doi.org/10.4028/www.scientific.net/kem.566.59.

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Barium titanate (BaTiO3, BT)-bismuth magnesium titanate (Bi (Mg1/2Ti1/2)O3, BMT)-bismuth ferrite (BiFeO3, BF) solid solution ceramics were prepared using a conventional solidstate synthesis, and their piezoelectric properties and microstructure were investigated. Strain electric field curves of the 0.3BT-0.1BMT-0.6BF ceramics with a single perovskite phase were ferroelectric butterfly-like curves. A strain maximum / electric field maximum (Smax/Emax) was 330 pm/V. Transmission electron microscopy revealed ferroelectric-like domain structure in the 0.3BT-0.1BMT-0.6BF ceramics.
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34

Hiruma, Yuji, Kazushige Yoshii, Rintaro Aoyagi, Hajime Nagata, and Tadashi Takenaka. "Piezoelectric Properties and Depolarization Temperatures of (Bi1/2Na1/2)TiO3-(Bi1/2K1/2)TiO3-BaTiO3 Lead-Free Piezoelectric Ceramics." Key Engineering Materials 320 (September 2006): 23–26. http://dx.doi.org/10.4028/www.scientific.net/kem.320.23.

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The piezoelectric properties of a solid solution based on the three components of bismuth sodium titanate, (Bi1/2Na1/2)TiO3 (BNT), bismuth potassium titanate, (Bi1/2K1/2)TiO3 (BKT), and barium titanate, BaTiO3 (BT), that is, x(Bi1/2Na1/2)TiO3-y(Bi1/2K1/2)TiO3-zBaTiO3 [BNBKy:z(x); x+y+z=1] are investigated. Fine piezoelectric properties in lead-free piezoelectric ceramics were obtained near the MPB composition, and the highest electromechanical coupling factors, k33 and kp, and piezoelectric constant, d33, were 0.58 and 0.36 for BNBK2:1(0.89) and 181 pC/N for BNBK2:1(0.88), respectively. In this study, we also measured the depolarization temperature, Td, from the temperature dependence of dielectric and piezoelectric properties.
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35

Potong, Ruamporn, Rattiyakorn Rianyoi, Athipong Ngamjarurojana, and Arnon Chaipanich. "Influence of BNBK Particle Size on Properties of 0-3 Lead-Free BNBK Ceramic-Portland Cement Composites." Applied Mechanics and Materials 866 (June 2017): 183–86. http://dx.doi.org/10.4028/www.scientific.net/amm.866.183.

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The 0-3 lead-free bismuth sodium titanate-bismuth potassium titanate-barium titanate (BNBK) ceramic/Portland cement composites (PC) were fabricated by pressing and curing method. The influence of BNBK particle size on the dielectric and acoustic properties of 0-3 BNBK-PC composites was studied. BNBK of various median particle sizes (75, 212 and 425 μm) at 50% by volume were mixed with Portland cement to produce the 0-3 BNBK-PC composites. The dielectric constant results of composites were found to increase with increasing BNBK particle size and the dielectric constant of composite with 425 μm particle size at 1 kHz was 196. The 0-3 BNBK-PC composites in the range tested have an acoustic impedance match with concrete structure.
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36

Zhao, Wei, He Ping Zhou, Yong Ke Yan, and Dan Liu. "Morphotropic Phase Boundary Study of the BNT-BKT Lead-Free Piezoelectric Ceramics." Key Engineering Materials 368-372 (February 2008): 1908–10. http://dx.doi.org/10.4028/www.scientific.net/kem.368-372.1908.

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A lead-free piezoelectric ceramic binary system based on bismuth sodium titanate (Bi0.5Na0.5)TiO3 (BNT)-bismuth potassium titanate (Bi0.5K0.5)TiO3 (BKT) was synthesized by conventional mixed-oxide technique. The XRD analysis showed that the rhombohedral-tetragonal morphotropic phase boundary (MPB) of the Bi0.5 (Na1-xKx)0.5 TiO3 system was in the composition range of x = 0.16 ~ 0.20. In addition, the piezoelectric properties of this system were also investigated. It was indicated that the piezoelectric properties are better with the compositions near the rhombohedral phase within the MPB than the compositions near the tetragonal phase.
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37

Bobic, Jelena, Mirjana Vijatovic-Petrovic, and Biljana Stojanovic. "Aurivillius BaBi4Ti4O15 based compounds: Structure, synthesis and properties." Processing and Application of Ceramics 7, no. 3 (2013): 97–110. http://dx.doi.org/10.2298/pac1303097b.

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The discovery of some Aurivillius materials with high Curie temperature or fatigue-free character suggests possible applications in high temperature piezoelectric devices or non-volatile ferroelectric random access memories. Furthermore, increasing concerns for environmental issues have promoted the study of new leadfree piezoelectric materials. Barium bismuth titanate (BaBi4Ti4O15 ), an Aurivillius compound, is promising candidate to replace lead-based materials, both as lead-free ferroelectric and high temperature piezoelectric. In this review paper, we report a detailed overview of crystal structure, different synthesis methods and characteristic properties of barium bismuth titanate ferroelectric materials.
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38

Li, Bao Rang, Bin Cao, and Cong Lu. "Application of Raman Spectroscopy on Size Driven Phase Transition in Bismuth Titanate." Advanced Materials Research 177 (December 2010): 25–28. http://dx.doi.org/10.4028/www.scientific.net/amr.177.25.

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Bismuth titanate nano-crystals were prepared successfully by sol-gel method and the critical particle size for phase transition was analyzed by Raman techniques. The results revealed the new Raman peaks at the wave number about 87, 227, 442, 467, 577 and 617cm-1 discerned gradually with increasing the particle size and abrupt increase in integrated intensity ratios of these modes, companied with strong decrease of half-widths happened at the particle size ranging from 18 to 33nm, which suggested an obvious size driven tetragonal-to-orthorhombic phase transition in Bismuth titanate nano-crystals.
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39

Hou, Dong, Elena Aksel, Chris M. Fancher, Tedi-Marie Usher, Takuya Hoshina, Hiroaki Takeda, Takaaki Tsurumi, and Jacob L. Jones. "Formation of sodium bismuth titanate-barium titanate during solid-state synthesis." Journal of the American Ceramic Society 100, no. 4 (January 12, 2017): 1330–38. http://dx.doi.org/10.1111/jace.14631.

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40

Feng, Xiang Ning, Wei Zhao, Hong Xing Wang, Wang Yang Jiang, and Qin Li. "Hydrothermal Synthesis of Spherical Bismuth Titanate Crystals." Key Engineering Materials 602-603 (March 2014): 7–10. http://dx.doi.org/10.4028/www.scientific.net/kem.602-603.7.

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Spherical bismuth titanate (Bi4Ti3O12) particles were synthesized by hydrothermal method using Bi(OH)3, Ti(SO4)2 and KOH as raw materials, using polyvinylpyrrolidone (PVP) as the surfactant. The effects of concentration of the alkali solution, the reaction temperature and soaking time on the bismuth titanate crystal structure and morphology have been analyzed. XRD, SEM were used to characterize the crystal structure and microstructure of the as-prepared Bi4Ti3O12.The results show that the temperature plays an important role on the morphology of the Bi4Ti3O12.As the increase of the hydrothermal temperature, the Bi4Ti3O12 has been transformed from the spherical morphology to fibrous morphology. The spherical Bi4Ti3O12 powders with uniform distribution can be obtained when the concentration of KOH is from 1mol/L to 2 mol/L,the reaction temperature and hydrothermal time are 160°C and 24h respectively. SEM observation showed that the diameter of spherical Bi4Ti3O12 is about 500 nm.
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41

Mei, X. A., M. Chen, C. Q. Huang, and R. F. Liu. "Ferroelectric Properties and Microstructures of Tb2O3-Doped Bismuth Titanate Ceramics." Key Engineering Materials 633 (November 2014): 265–68. http://dx.doi.org/10.4028/www.scientific.net/kem.633.265.

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The electrical properties of Tb2O3-doped bismuth titanate,Bi4-xTbxTi3O12 (BTT) ceramics prepared by a conventional electroceramic technique have been investigated. XRD analyses indicted Bi-layered perovskite structure in all samples, and revealed that Bi ions were only substituted near the Ti-O octahedron layers by Tb ions. SEM micrographs show randomly oriented and plate-like morphology. The remanent polarization ( Pr ) and coercive field ( Ec ) of the BTT ceramics with x=0.75 were above 16μC/cm2 and 75KV/cm, respectively. The large value of remanent polarization and low coercive field of Tb-doped bismuth titanate ceramics promote these materials to potential applications.
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42

Huang, Chong Qing, Min Chen, X. A. Mei, Y. H. Sun, and J. Liu. "Ferroelectric Properties and Microstructures of La2O3-Doped Bi4Ti3O12 Ceramics." Advanced Materials Research 412 (November 2011): 302–5. http://dx.doi.org/10.4028/www.scientific.net/amr.412.302.

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The electrical properties of La-doped bismuth titanate, Bi4-xLaxTi3O12(BLT) ceramics prepared by a conventional electroceramic technique have been investigated. XRD analyses revealed Bi-layered perovskite structure in all samples, and indicted that Bi ions were only substituted near the Ti-O octahedron layers by La ions. SEM micrographs show randomly oriented and plate-like morphology. The remanent polarization ( Pr) and coercive field ( Ec) of the BLT ceramic with x=0.75 were above 19μC/cm2and 60KV/cm, respectively. The large value of remanent polarization and low coercive field of La-doped bismuth titanate ceramics promote these materials to potential applications.
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43

Liu, J., M. Chen, X. A. Mei, Y. H. Sun, and Chong Qing Huang. "Ferroelectric Properties and Microstructures of Dy2O3-Doped Bi4Ti3O12 Ceramics." Key Engineering Materials 492 (September 2011): 226–29. http://dx.doi.org/10.4028/www.scientific.net/kem.492.226.

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The electrical properties of Dy-doped bismuth titanate, Bi4-xDyxTi3O12(BDT) ceramics prepared by a conventional electroceramic technique have been investigated. XRD analyses revealed Bi-layered perovskite structure in all samples, and indicted that Bi ions were only substituted near the Ti-O octahedron layers by Dy ions. SEM micrographs show randomly oriented and plate-like morphology. The remanent polarization (Pr) and coercive field (Ec) of the BDT ceramic with x = 0.75 were above 19μC/cm2and 50KV/cm, respectively. The large value of remanent polarization and low coercive field of Dy-doped bismuth titanate ceramics promote these materials to potential applications.
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44

Solís-Casados, D. A., L. Escobar-Alarcón, V. Alvarado-Pérez, and E. Haro-Poniatowski. "Photocatalytic Activity under Simulated Sunlight of Bi-Modified TiO2 Thin Films Obtained by Sol Gel." International Journal of Photoenergy 2018 (2018): 1–9. http://dx.doi.org/10.1155/2018/8715987.

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The synthesis of Bi-modified TiO2 thin films, with different Bi contents, is reported. The obtained materials were characterized by energy-dispersive X-ray spectroscopy (EDS), X-ray photoelectron spectroscopy (XPS), Raman spectroscopy (RS), X-ray diffraction (XRD), photoluminescence (PL), and diffuse reflectance spectroscopy (DRS), in order to obtain information on their chemical composition, vibrational features, and optical properties, respectively. Compositional characterization reveals that the bismuth content can be varied in an easy way from 0.5 to 25.4 at. %. Raman results show that the starting material corresponds to the anatase phase of crystalline TiO2, and Bi addition promotes the formation of bismuth titanates, Bi2Ti2O7 at Bi contents of 10.4 at. % and the Bi4Ti3O12 at Bi contents of 21.5 and 25.4 at. %. Optical measurements reveal that the band gap narrows from 3.3 eV to values as low as 2.7 eV. The photocatalytic activity was tested in the degradation reaction of the Malachite Green carbinol base dye (MG) as a model molecule under simulated sunlight, where the most relevant result is that photocatalytic formulations containing bismuth showed higher catalytic activity than pure TiO2. The higher photocatalytic activity of MG degradation of 67% reached by the photocatalytic formulation of 21.5 at. % of bismuth is attributed to the presence of the crystalline phase perovskite-type bismuth titanate, Bi4Ti3O12.
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45

Bobic, Jelena, Mirjana Vijatovic, Tadej Rojac, and Biljana Stojanovic. "Characterization and properties of barium bismuth titanate." Processing and Application of Ceramics 3, no. 1-2 (2009): 9–12. http://dx.doi.org/10.2298/pac0902009b.

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BaBi4Ti4O15 (BBiT) was prepared from stoichiometric amounts of BaTiO3 (BT) and Bi4Ti3O12 (BIT) obtained via mechanochemical synthesis. Mechanochemical synthesis was performed in air atmosphere in a planetary ball mill. BBiT ceramics were sintered at 1100?C, 1110?C and 1120?C for 1 h without pre-calcination step. The formation of phase and crystal structure of BT, BIT and BBiT were verified using X-ray analysis. The morphology of obtained powders and microstructure were examined using scanning electron microscopy. The electrical properties of sintered samples were carried out and BBiT shows behaviour typical for relaxor ferroelectrics and dielectric constant at room temperature is approximately 93. .
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46

Cheng, Yi Bing, Qun Bao Yang, Yan Mei Kan, Pei Ling Wang, Yong Xiang Li, Qing Rui Yin, and Dong Shen Yan. "Development of Textured Bismuth Titanate Piezoelectric Ceramics." Key Engineering Materials 247 (August 2003): 371–76. http://dx.doi.org/10.4028/www.scientific.net/kem.247.371.

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47

Paterson, Alisa R., Hajime Nagata, Xiaoli Tan, John E. Daniels, Manuel Hinterstein, Rajeev Ranjan, Pedro B. Groszewicz, Wook Jo, and Jacob L. Jones. "Relaxor-ferroelectric transitions: Sodium bismuth titanate derivatives." MRS Bulletin 43, no. 8 (August 2018): 600–606. http://dx.doi.org/10.1557/mrs.2018.156.

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48

Dhage, S. R., Y. B. Khollam, S. B. Dhespande, H. S. Potdar, and V. Ravi. "Synthesis of bismuth titanate by citrate method." Materials Research Bulletin 39, no. 13 (November 2004): 1993–98. http://dx.doi.org/10.1016/j.materresbull.2004.07.014.

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49

Jones, Jacob L., Sven C. Vogel, Elliott B. Slamovich, and Keith J. Bowman. "Quantifying texture in ferroelectric bismuth titanate ceramics." Scripta Materialia 51, no. 12 (December 2004): 1123–27. http://dx.doi.org/10.1016/j.scriptamat.2004.08.020.

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50

Piir, I. V., N. A. Sekushin, V. E. Grass, Y. I. Ryabkov, N. V. Chezhina, S. V. Nekipelov, V. N. Sivkov, and D. V. Vyalikh. "Bismuth manganese titanate: Crystal structure and properties." Solid State Ionics 225 (October 2012): 464–70. http://dx.doi.org/10.1016/j.ssi.2012.02.051.

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