Modified giant dielectric properties of samarium doped CaCu3Ti4O12 ceramics

Thongbai, Prasit; Putasaeng, Bundit; Yamwong, Teerapon; Maensiri, Santi

doi:10.1016/j.materresbull.2012.05.058

Cited by 66 publications

(39 citation statements)

References 36 publications

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“…Obviously, R gb at 80 • C of CCTO ceramics was greatly reduced by doping with Sm 3+ , while the insulating GB−layer density of the Sm05 ceramic greatly increased due to a large decrease in the mean grain size. This result is similar to that reported in the literature [21]. Conversely, R gb increased slightly when doped with Mg 2+ even though the insulating GB-layer density greatly decreased due to an increase in its mean grain size.…”

Section: Resultssupporting

confidence: 91%

“…Furthermore, abnormal grain growth was clearly observed in the Sm05 ceramic. These results are very similar those seen in a Ca 0.925 Sm 0.05 Cu 3 Ti 4 O 12 ceramic prepared using a SSR method [21]. The large reduction in the mean grain size of the Sm05 ceramic was attributed to the solute drag mechanism [21,29].…”

Section: Resultssupporting

confidence: 84%

“…According to our previous work [21], it was found that doping CCTO with Sm 3+ ions into Ca 2+ sites can inhibit the grain growth rate, resulting in a large decrease in the mean grain size. Thus, improved dielectric properties were accomplished by increasing the insulting GB density resulting from a decrease in grain size.…”

Section: Introductionmentioning

confidence: 90%

“…Presently, there are many methods available for enhancing these resistances. These include (1) changing Ca 2+ and Cu 2+ molar ratios to produce CCTO/CaTiO 3 (CTO) composites [17], (2) increasing the molar concentration of Ti in CCTO to produce CCTO/TiO 2 composites [18], (3) sintering or annealing CCTO in an oxidizing atmosphere to fill oxygen vacancies at GBs [3], (4) deliberately adding or creating a low-tan␦ second phase [19], (5) using new preparation methods [10,16], (6) reducing the grain size to increase the density of GB layers [11], and, (7) substitution of suitable metal ions into CCTO to intrinsically improve the electrical properties of GBs [9,[20][21][22][23] According to these methods, changes in the macroscopic properties of the GBs to decrease dc and tan␦ can be divided into two groups, i.e., geometric and intrinsic factors. The former controls the microstructure to obtain a fine grained ceramic microstructure with small grain sizes.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

A novel approach to achieve high dielectric permittivity and low loss tangent in CaCu3Ti4O12 ceramics by co-doping with Sm3+ and Mg2+ ions

Boonlakhorn

Kidkhunthod

Thongbai

2015

Journal of the European Ceramic Society

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Section: Resultssupporting

confidence: 91%

Section: Resultssupporting

confidence: 84%

Section: Introductionmentioning

confidence: 90%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A novel approach to achieve high dielectric permittivity and low loss tangent in CaCu3Ti4O12 ceramics by co-doping with Sm3+ and Mg2+ ions

Boonlakhorn

Kidkhunthod

Thongbai

2015

Journal of the European Ceramic Society

Self Cite

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“…The degree of electronic device miniaturization utilizing capacitive components is decided by the dielectric constant of a dielectric material [1,2]. The size of such devices can be reduced by replacing dielectric layers with a relatively high-dielectric material.…”

Section: Introductionmentioning

confidence: 99%

Quantitative structural analysis, phase transition and relaxor nature of Bi0.5Li0.5TiO3 ceramic prepared by mechanical alloying

Nayak

Panigrahi

2016

J Mater Sci: Mater Electron

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Bi 0.5 Li 0.5 TiO 3 (LBT) ceramics was prepared by mechanochemical synthesis and sintered at 600°C. Quantitative structural analysis was carried out and various structural parameters are presented here along with Rietveld refinement data. The dielectric study was carried out and observed that, presence of two dielectric anomalies in all frequencies signifies the phase transformation from ferroelectric to anti-ferroelectric at temp (T d ) 133.32°C and from anti ferroelectric phase to paraelectric phase at temp (T c ). 352.904°C for the first and second curve respectively. Different dielectric parameters and dielectric loss values T d and T c are noted. The values of e m , e r and tan d at temperatures T d , T c and T r (room temperature) at 10 kHz are presented in this study.

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Colossal Permittivity Materials as Superior Dielectrics for Diverse Applications

Wang

Jie

Yang

et al. 2019

Adv Funct Materials

155

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Ever since the beginning of this century, many kinds of materials have been reported to demonstrate colossal permittivity (CP) or colossal dielectric constant exceeding 10 3 . Accordingly, such CP materials and their further modification and improvement to achieve enhanced CP performance for promising applications in modern electronics, sensors, energy storage, and multifunctional devices and so on have attracted extensive attention. In this review, 2 a general overview of the recent advances in CP materials is provided, ranging from their various categories, physical mechanisms, and modulation methods to promising applications.First, various classes of CP materials are categorized in terms of their structures and dielectric properties. Subsequently, this review provides an insight into the CP mechanisms in views of barrier layer capacitance, defect-dipole cluster and polaronic effect. Moreover, the strategies and prototypical works are introduced in some aspects, including the manipulation of CP properties by doping, percolative capacitors and the methods employed to enhance the dielectric behaviors in CP materials with different forms. We then discuss a wide range of applications based on CP materials, such as modern electronics and energy storage. Finally, the challenges and opportunities for further investigation of CP materials are highlighted in the summary and future perspectives.

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Modified giant dielectric properties of samarium doped CaCu3Ti4O12 ceramics

Cited by 66 publications

References 36 publications

A novel approach to achieve high dielectric permittivity and low loss tangent in CaCu3Ti4O12 ceramics by co-doping with Sm3+ and Mg2+ ions

A novel approach to achieve high dielectric permittivity and low loss tangent in CaCu3Ti4O12 ceramics by co-doping with Sm3+ and Mg2+ ions

Quantitative structural analysis, phase transition and relaxor nature of Bi0.5Li0.5TiO3 ceramic prepared by mechanical alloying

Colossal Permittivity Materials as Superior Dielectrics for Diverse Applications

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