Nanothickness films, nanostructured films, and nanocrystals of barium titanate obtained directly by a newly developed sol–gel synthesis pathway

Ashiri, Rouholah; Nemati, Ali; Ghamsari, M. Sasani; Dastgahi, M. M.

doi:10.1007/s10854-014-2312-5

Cited by 18 publications

(10 citation statements)

References 37 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Figure presents FE‐SEM micrographs of BTO nanopowder products obtained in this work. According to the micrographs, it is evident that the barium titanate nanopowders are highly agglomerated in nature which this character is similar to our previous works . This is related to the nature of the process and also calcination step which helps partial surface bonding in the powder products.…”

Section: Resultssupporting

confidence: 80%

“…According to the micrographs, it is evident that the barium titanate nanopowders are highly agglomerated in nature which this character is similar to our previous works. 17,22,23,27,28,[32][33][34][35][36][60][61][62] This is related to the nature of the process and also calcination step which helps partial surface bonding in the powder products. Meanwhile, it can be said that the small particles which are seen in agglomerates are barium titanate nanocrystals.…”

Section: Ft-raman Spectrummentioning

confidence: 99%

“…Two major synthetic pathways are generally applied for obtainment of perovskite nanoparticles 17 ; conventional solid-state reactions using mechanical mills 4,7,18,21 and advanced wet chemical processing routes such as solgel, [22][23][24] hydrothermal 5 and sonochemical processing methods. [25][26][27][28] Mechanical milling using ball mills [29][30][31] was reported as an efficient feasible approach for mass production of perovskite powders which is able to obtain the final powder product from cheap starting materials.…”

mentioning

confidence: 99%

See 2 more Smart Citations

Tetragonality enhancement in BaTiO₃ by mechanical activation of the starting BaCO₃ and TiO₂ powders: Characterization of the contribution of the mechanical activation and postmilling calcination phenomena

Moghtada

Moghadam

Ashiri

2018

Int J Applied Ceramic Tech

View full text Add to dashboard Cite

By‐products including unwanted phase formation and/or unreacted starting materials are normally seen in the outcome of solid‐state synthesis approaches used in the literature for powder processing of advanced materials; this drawback requires critical attention and must be addressed in the new synthesis pathways in order to obtain quality powder products. A high energy mechanical milling approach was developed in this work. Addressing the drawback, the starting materials were mechanically activated by a high energy ball mill before their mixing step. It was found that highly pure barium titanate nanopowders with high tetragonality character are obtained using the approach developed here. The work also characterized tetragonality, role of the mechanical activation and postmilling thermal treatment on structure, phase formation and morphology of the obtained powder products. It was found that the mechanical activation accelerates the kinetic of formation of barium titanate and enhances the purity and tetragonality of the final products. The mechanism behind this achievement and the related reaction pattern are disclosed in this work. In order to obtain highly pure tetragonal barium titanate, a calcination temperature of 1173 K (900°C) after 30 hours mechanical activation is necessary; if these requirements are not satisfied, the final powder product contains impure phases and/or unreacted starting materials. The results also indicated that the processing conditions result in enhancement of tetragonality character of the final powder products. It seems that the method developed here can be used as a generalized methodology for obtaining the quality highly pure monosized nanocrystals of the mixed oxides for assembling in nanotechnology.

show abstract

Section: Resultssupporting

confidence: 80%

Section: Ft-raman Spectrummentioning

confidence: 99%

mentioning

confidence: 99%

See 1 more Smart Citation

Tetragonality enhancement in BaTiO₃ by mechanical activation of the starting BaCO₃ and TiO₂ powders: Characterization of the contribution of the mechanical activation and postmilling calcination phenomena

Moghtada

Moghadam

Ashiri

2018

Int J Applied Ceramic Tech

View full text Add to dashboard Cite

show abstract

“…Finally, it can be said that nanocrystalline materials are of significant importance due to their use for fabricating the micro or nanodevices [13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31].The synthesis of BTO materials through the method developed in this work is attractive for large-scale production and device application and may provide a general strategy for the large-scale synthesis of other perovskite and oxide ceramics.…”

Section: Resultsmentioning

confidence: 99%

Obtaining the highly pure barium titanate nanocrystals by a new approach

Ashiri

Moghadam

Ajami

2015

Journal of Alloys and Compounds

View full text Add to dashboard Cite

“…The synthesis of BaTiO 3 nanocrystals has been attempted through av ariety of approaches involvings olid-state melts, [8] microwaver eactors, [9,10] sol-gel alkoxides, [11][12][13] and solvothermal conditions. [14][15][16] Of these methods, solvothermal syntheses have received substantial attention not only for their low-temperature, energy-efficient conditions but also for their ability to readily tune the product's morphology.…”

Section: Introductionmentioning

confidence: 99%

Facile Synthesis of BaTiO₃ Nanocubes with the Use of Anatase TiO₂ Nanorods as a Precursor to Titanium Hydroxide

2016

View full text Add to dashboard Cite

We report a solvothermal method for the facile and reproducible synthesis of BaTiO3 nanocubes by employing anatase TiO2 nanorods as a precursor to titanium hydroxide. The TiO2 nanorods were, in turn, synthesized in advance through another solvothermal process. We could obtain high‐quality BaTiO3 nanocubes by reacting the TiO2 nanorods with Ba(NO3)2 under solvothermal conditions in the presence of oleic acid and acetic acid as dual capping agents, followed by a purification process involving chemical washing and physical filtration. The addition of acetic acid alongside oleic acid was critical to the formation of well‐defined {100} facets on the nanocrystals and also increased batch‐to‐batch reproducibility without the use of a glove box or similar air‐free experimental design. Using this method, BaTiO3 nanocubes crystallized in the cubic phase could be readily obtained with an average edge length around 8 nm.

show abstract

Nanothickness films, nanostructured films, and nanocrystals of barium titanate obtained directly by a newly developed sol–gel synthesis pathway

Cited by 18 publications

References 37 publications

Tetragonality enhancement in BaTiO₃ by mechanical activation of the starting BaCO₃ and TiO₂ powders: Characterization of the contribution of the mechanical activation and postmilling calcination phenomena

Tetragonality enhancement in BaTiO₃ by mechanical activation of the starting BaCO₃ and TiO₂ powders: Characterization of the contribution of the mechanical activation and postmilling calcination phenomena

Obtaining the highly pure barium titanate nanocrystals by a new approach

Facile Synthesis of BaTiO₃ Nanocubes with the Use of Anatase TiO₂ Nanorods as a Precursor to Titanium Hydroxide

Contact Info

Product

Resources

About

Nanothickness films, nanostructured films, and nanocrystals of barium titanate obtained directly by a newly developed sol–gel synthesis pathway

Cited by 18 publications

References 37 publications

Tetragonality enhancement in BaTiO3 by mechanical activation of the starting BaCO3 and TiO2 powders: Characterization of the contribution of the mechanical activation and postmilling calcination phenomena

Tetragonality enhancement in BaTiO3 by mechanical activation of the starting BaCO3 and TiO2 powders: Characterization of the contribution of the mechanical activation and postmilling calcination phenomena

Obtaining the highly pure barium titanate nanocrystals by a new approach

Facile Synthesis of BaTiO3 Nanocubes with the Use of Anatase TiO2 Nanorods as a Precursor to Titanium Hydroxide

Contact Info

Product

Resources

About

Tetragonality enhancement in BaTiO₃ by mechanical activation of the starting BaCO₃ and TiO₂ powders: Characterization of the contribution of the mechanical activation and postmilling calcination phenomena

Tetragonality enhancement in BaTiO₃ by mechanical activation of the starting BaCO₃ and TiO₂ powders: Characterization of the contribution of the mechanical activation and postmilling calcination phenomena

Facile Synthesis of BaTiO₃ Nanocubes with the Use of Anatase TiO₂ Nanorods as a Precursor to Titanium Hydroxide