Dielectric investigations on ‘MgAlON’ compounds: role of nitrogen content

Morey, O.; Goeuriot, Patrice; Juvé, Daniel; Tréheux, D.

doi:10.1016/s0955-2219(02)00195-4

Cited by 18 publications

(10 citation statements)

References 9 publications

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“…This technique is accurate enough (C P AE 0.01 pF) for dense materials (d > 95% d th ) [17]. The measurement of the relative permittivity dependence on frequency was repeated at various temperatures from 260 to 400 K, whereas near the precluded temperatures of phase transformations the interval was smaller then far from those temperatures.…”

Section: Characterization Techniquesmentioning

confidence: 99%

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%

Structure and properties of plasma sprayed BaTiO3 coatings

Ctibor

Ageorges

Sedláček

et al. 2010

Ceramics International

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“…23 Relative permittivity e r was calculated from measured capacities and specimen dimensions. 24 These same LCR-meters were used for the loss factor measurement. Loss factor tg d was measured at the same frequencies as capacity.…”

Section: Characterisation: Description Of Electric Measurementsmentioning

confidence: 99%

Dielectric properties of CaTiO₃ coatings prepared by plasma spraying

Sedláček

Ctibor

Kotlan

et al. 2013

Surface Engineering

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This paper presents a study of dielectric properties, namely the relative permittivity and loss factor dependence on the frequency of a weak electric field. Perovskite CaTiO 3 was studied in the form of coatings and self-supporting plates made by plasma spraying. A conventional gas stabilised plasma gun (GSP) as well as a water stabilised plasma gun (WSP) were employed. It was observed that plasma sprayed titanates exhibit a strong relaxation of permittivity and loss factor decrease with a frequency rise. These properties are influenced by spray technique and spraying parameters, but the relaxation character in general is preserved in all cases. The volume resistivity of the samples was studied as well. Several aspects of the structural features of plasma deposits, especially the phase composition, porosity character, and their influence on dielectric properties are discussed.

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“…Principle: Although the SEMME method has been fully explained previously, the principle is briefly recalled [12][13][14][15][16]. The sample is irradiated by electrons at high voltage in a SEM (LEO 440) equipped with a beam blanking device.…”

Section: Semme Techniquementioning

confidence: 99%

Influence of Defect Orientation on Electrical Insulating Properties of Plasma-Sprayed Alumina Coatings

et al. 2005

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The influence of the microstructure (pores and cracks) on electric properties of plasma-sprayed alumina coatings was investigated using the so-called Scanning Electron Microscope Mirror Effect (SEMME) technique.Coatings were sprayed with different alumina feedstock powders on various atmospheres using a CAPS ('Controlled Atmosphere Plasma Spraying'). Microstructures with various amount of porosity and cracks orientation distributions were analysed. Both outer surfaces and cross-sections of alumina coatings have been analysed by SEMME technique using two complementary modes (measurement of absorbed current and mirror methods). Originally developed to study the behaviour of injected electrons and related phenomena, such as trapping ability, detrapping process and relaxation phenomena in bulk insulating materials, the SEMME technique was successfully applied, in this study, to porous coatings. It is proved that cracks orientation modifies both motion and trapping of charges and therefore the dielectric properties of plasma-sprayed alumina coatings.

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Dielectric investigations on ‘MgAlON’ compounds: role of nitrogen content

Cited by 18 publications

References 9 publications

Structure and properties of plasma sprayed BaTiO3 coatings

Structure and properties of plasma sprayed BaTiO3 coatings

Dielectric properties of CaTiO₃ coatings prepared by plasma spraying

Influence of Defect Orientation on Electrical Insulating Properties of Plasma-Sprayed Alumina Coatings

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Dielectric investigations on ‘MgAlON’ compounds: role of nitrogen content

Cited by 18 publications

References 9 publications

Structure and properties of plasma sprayed BaTiO3 coatings

Structure and properties of plasma sprayed BaTiO3 coatings

Dielectric properties of CaTiO3 coatings prepared by plasma spraying

Influence of Defect Orientation on Electrical Insulating Properties of Plasma-Sprayed Alumina Coatings

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Dielectric properties of CaTiO₃ coatings prepared by plasma spraying