Preparation and characterization of hafnium doped barium titanate ceramics

Tian, Hu Yong; Wang, Yu; Miao, Jun; Chan, Helen L. W.; Choy, C. L.

doi:10.1016/j.jallcom.2006.05.037

Cited by 64 publications

(34 citation statements)

References 11 publications

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“…Barium titanate has been extensively employed in several industrial applications, including dynamic random access memory (DRAM) capacitor, microwave filters, infrared detectors and dielectric phase shifters, due to their excellent ferroelectric, dielectric, piezoelectric and pyroelectric properties [1][2][3][4][5][6][7][8]. For the ABO 3 perovskite, different A-site and B-site dopants (where A = Ca, Sr, La; B = Nb, Ta, Zr) are used to modify the electrical properties of BaTiO 3 based compositions [6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

“…For the ABO 3 perovskite, different A-site and B-site dopants (where A = Ca, Sr, La; B = Nb, Ta, Zr) are used to modify the electrical properties of BaTiO 3 based compositions [6][7][8][9]. Recently, barium strontium titanate (BST) has attracted much attention because of its strong dielectric nonlinearity under biaselectric field and linearly adjustable Curie temperature with the strontium content over a wide temperature range [9][10][11].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Microwave-hydrothermal synthesis of barium strontium titanate nanoparticles

Simões

Moura

Onofre

et al. 2010

Journal of Alloys and Compounds

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Microwave-hydrothermal synthesis of barium strontium titanate nanoparticles

Simões

Moura

Onofre

et al. 2010

Journal of Alloys and Compounds

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“…One step of energy conservation that was seen in the proposed methods is instead of using BaTiO 3 after combustion, the intermediate, Ba[Ti(C 6 H 4 O 2 ) 3 ] (aq), was used in the doping process and therefore energy was ultimately saved. In addition, lower temperature, atmospheric pressure, and decreased lengths of time were used for calcinations compared with previously researched methods (17). For instance, in the conventional solid-state method for synthesizing barium titanate, temperatures exceeded 10008C for up to 12 hours (2).…”

Section: Resultsmentioning

confidence: 99%

Toward a more environmentally benign synthesis of doped barium titanate

Marteel‐Parrish

DeCarlo

Harlan

et al. 2008

Green Chemistry Letters and Reviews

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Barium titanate is one of the most thoroughly studied members of the perovskite family due to its prominent place in the electroceramic industry. To be used as a capacitor at room temperature, a high-dielectric constant is needed which is achieved through doping. The focus of this research was to develop a more environmentally benign alternative to the doping of barium titanate. The barium source was barium titanyl catecholate, Ba[Ti(cat) 3 ] (aq) and the doping sources were strontium oxalate (SrC 2 O 4 ) and strontium carbonate (SrCO 3 ). The doping strategies included a solid-state synthetic pathway as well as microwave-and centrifuge-assisted methods which both employed water as the only solvent. The last two benign by design methods were tested with respect to their thermodynamic control over barium-to-strontium stoichiometric ratios. These methods of doping proved to be more environmentally friendly and economical while combining green chemistry and materials science.

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“…The tunable devices such as varactors, filters, oscillators, and phase shifters make use of the nonlinearity of the internal electrical polarization, of ferroelectric materials, steerable by an external electric field [1][2][3][4]. Compared to the popular tuning elements such as p-i-n diodes, GaAs Schottky diodes or ferromagnetics, ferroelectric components offer the advantages of continuous, quick, low power tunability up to gigahertz frequencies [5,6].…”

Section: Introductionmentioning

confidence: 99%