Low-temperature aqueous preparation of barium metatitanate powders

Nanni, Paolo; Leoni, M.; Buscaglia, Vincenzo; Aliprandi, G.

doi:10.1016/0955-2219(94)90048-5

Cited by 45 publications

(17 citation statements)

References 17 publications

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“…Up to date, no work on preparation of Ba(Ti 1 − x Sn x )O 3 solid solution by low temperature aqueous solution method has been reported. Some papers regarding the synthesis of BaSnO 3 using LTAS method were published [12,13].…”

Section: Introductionmentioning

confidence: 99%

Ba(Ti1−xSnx)O3 (x=0.13) nanomaterials produced by low-temperature aqueous synthesis

Cernea

Trușcă

Radu

et al. 2011

Journal of Alloys and Compounds

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Section: Introductionmentioning

confidence: 99%

Ba(Ti1−xSnx)O3 (x=0.13) nanomaterials produced by low-temperature aqueous synthesis

Cernea

Trușcă

Radu

et al. 2011

Journal of Alloys and Compounds

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“…[12][13][14][15] The MLCC industry is continuing intensive efforts to reduce component size with increasing the volumetric efficiency of the MLCCs by decreasing the dielectric layer thickness down to 1-2 m. 16 In the past decades, extensive studies have been conducted to produce nanosized BaTiO 3 powders with narrow particle size distribution, controlled morphology, and high purity. BaTiO synthesized by various techniques: hydrothermal method, 7,17-35 sol-gel process, [36][37][38][39][40][41] low temperature aqueous synthesis (LTAS), [42][43][44] low temperature direct synthesis (LTDS), 45,46 combustion synthesis 47 , oxalate coprecipitation route, 2,48 microwave heating, 49 and microemulsion process. 50 Hennings et al 19 synthesized BaTiO 3 powders from Ba/Ti acetate gel precursors by a two-step route: transparent gels of Ba/Ti acetate was formed by sol-gel process followed by hydrothermal treatment.…”

Section: Introductionmentioning

confidence: 99%

Nanocrystalline BaTiO3 powder via a sol process ambient conditions

Wang

Lee

et al. 2006

Journal of the European Ceramic Society

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“…12,13 The reason for the detrimental effects of water is believed to be the instability of alkaline-earth titanates in water, which were rst observed experimentally in calcium titanate (CaTiO 3 ).…”

Section: A Introductionmentioning

confidence: 99%

Successful aqueous processing of a lead free 0.5Ba(Zr_0.2Ti_0.8)O₃–0.5(Ba_0.7Ca_0.3)TiO₃ piezoelectric material composition

et al. 2014

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We report on the successful aqueous processing of a lead free piezoelectric 0.5Ba(Zr 0 2 Ti 0 8 )O 3 0.5(Ba 0 7 Ca 0 3 )TiO 3 (BZT BCT) composition with the final functional properties of the materials unaffected by the various processing steps involved. X-ray diffraction results show a single tetragonal perovskite crystalline phase for the as-received sintered BZT BCT powder. The purity of the perovskite phase for BZT BCT powder was found to be controlled even after ageing the material in water for 24 h as a successful surface treatment against hydrolysis. An aqueous suspension of surface treated BZT BCT powder with 50 vol% solid loading was successfully transformed into micro-sized granules via a freeze granulation (FG) method. Various structural, electrical and mechanical properties of sintered BZT BCT-FG and BZT BCT-NG ceramics consolidated from freeze granulated and non-granulated (NG) powders, respectively, were measured. The dielectric constant (3 r ) values of the BZT BCT-FG sample were found to be higher, with lower dielectric loss (tan d) values in comparison with those of a sample prepared from the BZT BCT-NG powder at all temperatures and with all frequency ranges tested.Nanoindentation results revealed that the ability to oppose deformation was nearly 10-fold higher for BZT BCT-FG (6.93 GPa) than for BZT BCT-NG ceramics (543 MPa). The functional properties of BZT BCT-FG samples confirmed the benefits of the aqueous processing approach in comparison with traditional dry pressing. A IntroductionSuccessful aqueous processing of multicomponent electroceramics relies on their various functional properties being unaffected by the chance of there being ionic leaching in water. There have been recent reports in the literature on the sintering behavior of BZT-BCT material showing dielectric properties at various sintering temperatures.8 11 Depending on a material's functional applications, it is necessary to control its structural and compositional evolution to achieve superior properties. Furthermore, the materials need to be consolidated in bulk (polycrystalline ceramics, single crystals) or in lm (thick and thin) form to draw benets from their relevant properties. A reduction in dimension of all passive components without compromising performance, and improved reliability are desirable in electronics technology.To date, non-aqueous processing of electroceramics is preferred because of the common water sensitiveness of the starting powders and the consequent leaching of material components, which affects the nal product functional properties and oen results in exaggerated grain growth and low nal density.12,13 The reason for the detrimental effects of water is believed to be the instability of alkaline-earth titanates in water, which were rst observed experimentally in calcium titanate (CaTiO 3 ).14 However, aqueous processing is attractive from both environmental and economical standpoints. The knowledge acquired with aqueous processing of other water sensitive powders such as magnesium aluminate (M...

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Low-temperature aqueous preparation of barium metatitanate powders

Cited by 45 publications

References 17 publications

Ba(Ti1−xSnx)O3 (x=0.13) nanomaterials produced by low-temperature aqueous synthesis

Ba(Ti1−xSnx)O3 (x=0.13) nanomaterials produced by low-temperature aqueous synthesis

Nanocrystalline BaTiO3 powder via a sol process ambient conditions

Successful aqueous processing of a lead free 0.5Ba(Zr_0.2Ti_0.8)O₃–0.5(Ba_0.7Ca_0.3)TiO₃ piezoelectric material composition

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Low-temperature aqueous preparation of barium metatitanate powders

Cited by 45 publications

References 17 publications

Ba(Ti1−xSnx)O3 (x=0.13) nanomaterials produced by low-temperature aqueous synthesis

Ba(Ti1−xSnx)O3 (x=0.13) nanomaterials produced by low-temperature aqueous synthesis

Nanocrystalline BaTiO3 powder via a sol process ambient conditions

Successful aqueous processing of a lead free 0.5Ba(Zr0.2Ti0.8)O3–0.5(Ba0.7Ca0.3)TiO3 piezoelectric material composition

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Successful aqueous processing of a lead free 0.5Ba(Zr_0.2Ti_0.8)O₃–0.5(Ba_0.7Ca_0.3)TiO₃ piezoelectric material composition