Dielectric relaxation in calcium titanate-containing ceramics prepared by plasma spraying

Ctibor, Pavel; Sedláček, Josef; Neufuss, K.; Chráska, P.

doi:10.1016/s0272-8842(03)00052-x

Cited by 15 publications

(24 citation statements)

References 7 publications

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“…Capacity was measured in the frequency range from 50 Hz to 1 MHz using a programmable impedance analyzer model PM6306 (Fluke, the Netherlands). Applied voltage was 1 V AC [9]. Relative permittivity e r was calculated from measured capacities C P and specimen dimensions since e r is directly proportional to C P by the Eq.…”

Section: Characterization Techniquesmentioning

confidence: 99%

“…Plasma spraying enables to create layers with 'bulk-like' thickness but adhering on a metallic substrate of various shapes. Free-standing parts of titanate ceramics can be fabricated as well by plasma spraying [9]. BaTiO 3 itself was up to now very seldom plasma sprayed and the understanding of its www.elsevier.com/locate/ceramint behavior in the form of sprayed coating is not satisfactory.…”

Section: Introductionmentioning

confidence: 99%

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Structure and properties of plasma sprayed BaTiO3 coatings

Ctibor

Ageorges

Sedláček

et al. 2010

Ceramics International

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Plasma spraying enables to create layers with thickness in a millimeter range adhering on various substrates. This paper provides a study of electric and mechanical properties of BaTiO 3 coatings prepared by atmospheric plasma spraying. The spraying was carried out by a direct current gas-stabilized plasma gun. BaTiO 3 was fed into the plasma jet as a feedstock powder prepared by a reactive sintering of micrometer-sized powders of BaCO 3 and TiO 2 . Microstructure and phase composition are reported and discussed in connection with electric and mechanical properties. The ability of the used techniques to detect precisely the phase transformation temperatures of BaTiO 3 plasma sprayed coatings is discussed as well. A depth-sensing indentation measurement was done between 290 and 520 K to provide local mechanical characterization. The elastic modulus has shown slightly higher values than that reported typically in papers focused on BaTiO 3 ferroelectric thin films. The average Vickers microhardness is tested to characterize the samples in larger scale. A wear resistance in a slurry environment is reported as well. Dielectric properties are reported for the temperature window of existence of the tetragonal ferroelectric phase. Relative permittivity and loss factor are studied at frequency from 50 Hz to 1 MHz and temperature from 260 to 400 K. #

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Section: Characterization Techniquesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Structure and properties of plasma sprayed BaTiO3 coatings

Ctibor

Ageorges

Sedláček

et al. 2010

Ceramics International

Self Cite

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“…But compared to other plasma deposited ceramic materials [24,25], the alumina-zirconia system seems to be a relatively good insulator in the as-sprayed state. It is visible that AZ40 having the lowest and only weekly frequency-dependent loss factor have also the highest volume resistivity.…”

Section: Resultsmentioning

confidence: 74%

“…The authors' approach utilizes experiences gained on titanates and silicates [21][22][23][24][25]. In their opinion no materials exist which are absolutely suitable for a comprehensive study of the behavior of plasma sprayed ceramics in general in the electric field.…”

Section: Materials Selectionmentioning

confidence: 99%

Influence of chemical composition on dielectric properties of Al2O3 and ZrO2 plasma deposits

Ctibor

Sedláček

Neufuss

2003

Ceramics International

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Aluminum oxide, zirconium oxide and their mixture were plasma sprayed by a water-stabilized plasma gun. Resulting deposits were studied as dielectrics. Capacity and loss factor were measured for the frequency range 200-10 6 Hz and relative permittivity was calculated. Electric resistance was also measured and volume resistivity calculated for all studied materials. It was proved that dielectric behavior of plasma sprayed oxide ceramics like alumina-and zirconia-based materials at low voltage follows the expectations based on the knowledge of dielectric behavior of sintered ceramics. #

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“…Thus, improving the corrosion resistance of superalloy substrates, such as gas-turbine blades, has been a very distinct line of research and publication (Ref [13][14][15]. Besides this, the high electrical resistivity of these coatings has been exploited to achieve insulating coatings for use in electronics (Ref [16][17][18][19].…”

Section: Metal Oxide Passive Layersmentioning

confidence: 99%

Milestones in Functional Titanium Dioxide Thermal Spray Coatings: A Review

Gardon

Guilemany

2014

J Therm Spray Tech

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Titanium dioxide has been the most investigated metal oxide due to its outstanding performance in a wide range of applications, chemical stability and low cost. Coating processes that can produce surfaces based on this material have been deeply studied. Nevertheless, the necessity of coating large areas by means of rapid manufacturing processes renders laboratory-scale techniques unsuitable, leading to a noteworthy interest from the thermal spray (TS) community in the development of significant intellectual property and a large number of scientific publications. This review unravels the relationship between titanium dioxide and TS technologies with the aim of providing detailed information related to the most significant achievements, lack of knowhow, and performance of TS TiO 2 functional coatings in photocatalytic, biomedical, and other applications. The influence of thermally activated techniques such as atmospheric plasma spray and high-velocity oxygen fuel spray on TiO 2 feedstock based on powders and suspensions is revised; the influence of spraying parameters on the microstructural and compositional changes and the final active behavior of the coating have been analyzed. Recent findings on titanium dioxide coatings deposited by cold gas spray and the capacity of this technology to prevent loss of the nanostructured anatase metastable phase are also reviewed.

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Dielectric relaxation in calcium titanate-containing ceramics prepared by plasma spraying

Cited by 15 publications

References 7 publications

Structure and properties of plasma sprayed BaTiO3 coatings

Structure and properties of plasma sprayed BaTiO3 coatings

Influence of chemical composition on dielectric properties of Al2O3 and ZrO2 plasma deposits

Milestones in Functional Titanium Dioxide Thermal Spray Coatings: A Review

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