Dielectric ceramic with stable relative permittivity and low loss from −60 to 300°C: A potential high temperature capacitor material

Jan, Saeed Ullah; Zeb, Aurang; Milne, Steven J.

doi:10.1016/j.jeurceramsoc.2016.03.018

Cited by 24 publications

(4 citation statements)

References 28 publications

(25 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The losses are attributed to increased conduction arising from lattice defects induced through volatilization of the bismuth oxide. 22, With the synthesis conditions described above, the grain sizes are found to be extremely small, and may give rise to resistive and capacitive grain boundaries. As improved elsewhere, 23,24 the dielectric loss appears to be a strong function of grain size.…”

Section: Resultsmentioning

confidence: 98%

Co-Precipitation Synthesis and Characterization of SrBi2Ta2O9 Ceramic

Afqir

Tachafine

Fasquelle

et al. 2018

Journal of Elec Materi

View full text Add to dashboard Cite

Strontium bismuth tantalate (SrBi 2 Ta 2 O 9 ) was synthesized by a co-precipitation method. The sample was characterized by x-ray powder diffraction patterns (XRD), Fourier-transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM). The results of the dielectric properties are reported at room temperature. No secondary phases were found while heating the powder at 850°C and the pure SrBi 2 Ta 2 O 9 phase was formed, as revealed by XRD. The characteristic bands for SrBi 2 Ta 2 O 9 were observed by FTIR at approximately 619 cm À1 and 810 cm À1 . SEM micrographs for the sample displayed thin plate-like grains. The grain size was less than 1 lm and the crystallite size of about 24 nm. Dielectric response at room temperature shows that the SrBi 2 Ta 2 O 9 ceramic has low loss values, and the flattening of the dielectric constant at higher frequencies. The observed Curie temperature is comparable with those reported in the literature.

show abstract

Section: Resultsmentioning

confidence: 98%

Co-Precipitation Synthesis and Characterization of SrBi2Ta2O9 Ceramic

Afqir

Tachafine

Fasquelle

et al. 2018

Journal of Elec Materi

View full text Add to dashboard Cite

show abstract

“…A number of compositional systems have been reported to exhibit good dielectric temperature stability. These are mainly relaxor dielectrics, which are mostly based on perovskite‐structured solid solutions involving (Ba,Ca)TiO 3 , Na 0.5 Bi 0.5 TiO 3 , and (K,Na)NbO 3 as end‐members 4,5 . By optimizing the compositions in these solid solutions, a highly stable capacitance (<15% deviation) with low dielectric losses (<2%) over a temperature range of −50°C to 200°C was achieved.…”

Section: Introductionmentioning

confidence: 99%

“…These are mainly relaxor dielectrics, which are mostly based on perovskite-structured solid solutions involving (Ba,Ca)TiO 3 , Na 0.5 Bi 0.5 TiO 3 , and (K,Na)NbO 3 as endmembers. 4,5 By optimizing the compositions in these solid solutions, a highly stable capacitance (<15% deviation) with low dielectric losses (<2%) over a temperature range of −50 • C to 200 • C was achieved. However, the dielectric constants are usually low (<600), which needs to be further improved.…”

Section: Introductionmentioning

confidence: 99%

High and temperature‐stable dielectric constants in PNb₉O₂₅ ceramic

2022

J Am Ceram Soc.

View full text Add to dashboard Cite

PNb9O25 ceramic was prepared using a sparking plasma sintering (SPS) method. Microstructure, dielectric and electrical properties of the ceramic were investigated. Dense ceramic was obtained, and the ceramic exhibited a high dielectric constant (>1000) and a low dielectric loss (∼2%) in the investigated frequency range of 100 Hz‐100 kHz at room temperature. Dielectric relaxations with strong frequency dispersion occurred at temperatures higher than 250°C, which were due to oxygen vacancies. A highly stable capacitance (< 10% deviation) over a wide temperature range of –30°C to –200°C was obtained. The ceramic also showed a relatively high electrical conductivity (>4 × 10−8 S/cm) with an activation energy of approximately 0.9 eV in the temperature range of >200°C.

show abstract

“…In recently years, the market demand of MLCC chips is growing with the rapid development of electric equipment. Commercial MLCC chips, especially X7R or X8R (X stands for the lowest working temperature of -55°C, 7 and 8 symbolize the highest working temperature of 125°C and 150°C, respectively, and R means the temperature coefficient of capacitance less than ±15%), are expected to be used up to 125°C and 150°C,respectively [1][2][3][4][5]. Nowadays, aerospace, automotive and oil exploration are expected to operate under the harsh environment.…”

Section: Introductionmentioning

confidence: 99%

Effect of Sintering Process on Microstructures and Dielectric Properties of Nb-Doped BaTiO3-(Bi0.5Na0.5)TiO3 Ceramics for X9R MLCC Applications

Chen

Shen

Zhao

et al. 2018

SSP

View full text Add to dashboard Cite

Multilayer ceramic capacitor (MLCC) chips have been successfully prepared through tape-casting and screen-printing. Conventional sintering method and two-step sintering method with different sintering temperature and holding time are used to obtain the MLCC chips. The scanning electron microscopes show that MLCC chips sintered by two-step sintering at T1=1200°C and T2=1130°C for 3h have a highly dense dielectric layer. The temperature coefficient of capacitance (TCC) of the MLCC chip is less than ±15% from-60°C to 235 °C that satisfactorily meets the requirement of X9R. The average capacitance and the dielectric loss of the MLCC chip are 88nF and 1.8% at the room temperature, respectively.

show abstract

Dielectric ceramic with stable relative permittivity and low loss from −60 to 300°C: A potential high temperature capacitor material

Cited by 24 publications

References 28 publications

Co-Precipitation Synthesis and Characterization of SrBi2Ta2O9 Ceramic

Co-Precipitation Synthesis and Characterization of SrBi2Ta2O9 Ceramic

High and temperature‐stable dielectric constants in PNb₉O₂₅ ceramic

Effect of Sintering Process on Microstructures and Dielectric Properties of Nb-Doped BaTiO<sub>3</sub>-(Bi<sub>0.5</sub>Na<sub>0.5</sub>)TiO<sub>3</sub> Ceramics for X9R MLCC Applications

Contact Info

Product

Resources

About

Dielectric ceramic with stable relative permittivity and low loss from −60 to 300°C: A potential high temperature capacitor material

Cited by 24 publications

References 28 publications

Co-Precipitation Synthesis and Characterization of SrBi2Ta2O9 Ceramic

Co-Precipitation Synthesis and Characterization of SrBi2Ta2O9 Ceramic

High and temperature‐stable dielectric constants in PNb9O25 ceramic

Effect of Sintering Process on Microstructures and Dielectric Properties of Nb-Doped BaTiO<sub>3</sub>-(Bi<sub>0.5</sub>Na<sub>0.5</sub>)TiO<sub>3</sub> Ceramics for X9R MLCC Applications

Contact Info

Product

Resources

About

High and temperature‐stable dielectric constants in PNb₉O₂₅ ceramic