Preparation of ferroelectric barium titanate through an energy effective solid state ultrasound assisted method

2017 ◽  
Vol 100 (10) ◽  
pp. 4511-4518 ◽  
Author(s):  
Razvan Rotaru ◽  
Cristian Peptu ◽  
Petrisor Samoila ◽  
Valeria Harabagiu
Keyword(s):  
Solid State ◽  
Barium Titanate ◽  
Ultrasound Assisted

scholarly journals Precursor Phenomena of Barium Titanate Single Crystals Grown Using a Solid-State Single Crystal Growth Method Studied with Inelastic Brillouin Light Scattering and Birefringence Measurements

Molecules ◽  
2018 ◽  
Vol 23 (12) ◽  
pp. 3171 ◽  
Author(s):  
Soo Han Oh ◽  
Jae-Hyeon Ko ◽  
Ho-Yong Lee ◽  
Iwona Lazar ◽  
Krystian Roleder
Keyword(s):  
Crystal Growth ◽  
Solid State ◽  
Barium Titanate ◽  
Single Crystal ◽  
Single Crystals ◽  
Melting Process ◽  
Point Of View ◽  
Crystal Quality ◽  
Cubic Phase ◽  
Growth Method

The nature of precursor phenomena in the paraelectric phase of ferroelectrics is one of the main questions to be resolved from a fundamental point of view. Barium titanate (BaTiO3) is one of the most representative perovskite-structured ferroelectrics intensively studied until now. The pretransitional behavior of BaTiO3 single crystal grown using a solid-state crystal growth (SSCG) method was investigated for the first time and compared to previous results. There is no melting process in the SSCG method, thus the crystal grown using a SSCG method have inherent higher levels of impurity and defect concentrations, which is a good candidate for investigating the effect of crystal quality on the precursor phenomena. The acoustic, dielectric, and piezoelectric properties, as well as birefringence, of the SSCG-grown BaTiO3 were examined over a wide temperature range. Especially, the acoustic phonon behavior was investigated in terms of Brillouin spectroscopy, which is a complementary technique to Raman spectroscopy. The obtained precursor anomalies of the SSCG-grown BaTiO3 in the cubic phase were similar to those of other single crystals, in particular, of high-quality single crystal grown by top-seeded solution growth method. These results clearly indicate that the observed precursor phenomena are common and intrinsic effect irrespective of the crystal quality.

Preparation of tetragonal barium titanate nanopowders by microwave solid-state synthesis

2020 ◽  
Vol 126 (4) ◽  
Author(s):  
Haoyu Qian ◽  
Guisheng Zhu ◽  
Huarui Xu ◽  
Xiuyun Zhang ◽  
Yunyun Zhao ◽  
...  
Keyword(s):  
Solid State ◽  
Barium Titanate ◽  
Solid State Synthesis

Enzyme production by solid‐state fermentation on soybean meal: A comparative study of conventional and ultrasound‐assisted extraction methods

2019 ◽  
Vol 66 (3) ◽  
pp. 361-368 ◽  
Author(s):  
Abdalla Ali Salim ◽  
Sanja Grbavčić ◽  
Nataša Šekuljica ◽  
Maja Vukašinović‐Sekulić ◽  
Jelena Jovanović ◽  
...  
Keyword(s):  
Solid State ◽  
Comparative Study ◽  
Solid State Fermentation ◽  
Soybean Meal ◽  
Enzyme Production ◽  
Extraction Methods ◽  
Ultrasound Assisted Extraction ◽  
Assisted Extraction ◽  
Ultrasound Assisted
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