Effects of dopant ions on the conductivity of Ce0.75Sm0.2M0.05O1.875 (M = Al, Fe, Y, Bi) electrolytes

Liang, Wenjie; Shi, Qingle; Han, Ping; He, Shoucheng; Li, Tianjing; Hou, Haijun

doi:10.1007/s10854-018-9359-7

Cited by 11 publications

(12 citation statements)

References 37 publications

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“…Developing resistive barriers by the control of grain boundaries is of interest in a number of applications, such as varistors, thermistors, and barrier layer capacitors . In the case of conventional varistors, ZnO is usually doped with Bi 2 O 3 , Sb 2 O 3 , CoO, MnO, or Cr 2 O 3 and sintered at high temperatures (≈1000 °C) to obtain an inorganic resistive intergranular boundary in the range of 1–10 nm .…”

Section: Case Studies In Property Designmentioning

confidence: 99%

Recent Progress in Applications of the Cold Sintering Process for Ceramic–Polymer Composites

Guo

Zhao

Beauvoir

et al. 2018

Adv Funct Materials

141

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Ceramic-polymer composites are of interest for designing enhanced and unique properties. However, the processing temperature windows of sintering ceramics are much higher than that of compaction, extrusion, or sintering of polymers, and thus traditionally there has been an inability to cosinter ceramic-polymer composites in a single step with high amounts of ceramics. The cold sintering process is a low-temperature sintering technology recently developed for ceramics and ceramic-based composites. A wide variety of ceramic materials have now been demonstrated to be densified under the cold sintering process and therefore can be all cosintered with polymers from room temperature to 300 °C. Here, the status, understanding, and application of cold cosintering, with different examples of ceramics and polymers, are discussed. One has to note that these types of cold sintering processes are yet new, and a full understanding will only emerge after more ceramic-polymer examples emerge and different research groups build upon these early observations. The general processing, property designs, and an outlook on cold sintering composites are outlined. Ultimately, the cold sintering process could open up a new multimaterial design space and impact the field of ceramic-polymer composites.

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Section: Case Studies In Property Designmentioning

confidence: 99%

Recent Progress in Applications of the Cold Sintering Process for Ceramic–Polymer Composites

Guo

Zhao

Beauvoir

et al. 2018

Adv Funct Materials

141

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“…Please check for correctness.&block; conductivity in the grains and back-to-back Schottky barriers to limit conduction across each grain boundary, with acceptor dopants, and inorganic intergranular phases controlling the electrical transport across a grain boundary. [10][11][12] In the case of ZnO doped with Bi2O3, the thickness of intergranular phase is between 1 and 5 nm, and with other dopant soluble in the interfaces of ZnO this thickness can be around 10 nm. [13][14][15][16] In commercial varistors, there are a number of dopants and firing processes to control the details of the interfaces and the overall microstructures.…”

Section: Introductionmentioning

confidence: 99%

Introducing a ZnO–PTFE (Polymer) Nanocomposite Varistor via the Cold Sintering Process

et al. 2018

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The nanocomposite structure is verified to have polymer intergranular phase in a thickness range from 2 to 5 nm. The electrical characteristics are made to show nonlinear I-V behavior; the barrier-layer effective permittivity is established through an impedance spectroscopy analysis. The activation energies controlling resistance at the grain boundary is determined to range between 0.2 and 0.76 eV with volume fractions between 0 and 40 vol% PTFE. Under high fields and across a broad temperature ranges, the authors quantified of the non-linear conductions with a variety of voltages, the low field higher temperatures are consistent with a Schottky thermionic emission controlled conduction, and Fowler-Nordheim plots shows the current is transitioned to tunneling controlled. The authors also discuss the possibility of designing new types of nanocomposites with the process indicated here, and also having the possibility of taking advantage of interfacial size effects with thin polymer films between ceramic grains.

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“…Ultraviolet (UV) detectors are widely used in astronomy, combustion engineering, water purication, ame detection, biological effects and other elds. [1][2][3][4][5] Over the years, wide band gap semiconductor materials (GaN, SiC and ZnO) have attracted more attention from researchers, especially for ZnO, due to its unique desirable properties such as wide band gap (3.2 eV), high exciton binding energy (60 meV), low cost, natural abundance and its ability to work in high temperature and damp environments. [6][7][8][9][10] However, photoconductive UV detectors based on pure ZnO lms show relatively poor response properties in the UV region, because of the large carrier concentration and fast recombination rate.…”

Section: Introductionmentioning

confidence: 99%

Structural, optical and photoelectric properties of Mn-doped ZnO films used for ultraviolet detectors

Zhu

Yang

2019

RSC Adv.

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Mn-doped ZnO (MZO) films were prepared on glass substrates using sol-gel dip-coating technology. The microstructural, morphological, optical and photoelectric properties of MZO films were investigated at different withdrawal speeds (WS: 20, 40, 60 and 80 mm s À1 ). The X-ray diffraction (XRD) patterns showed that all the films obtained were polycrystalline with a hexagonal structure, and the highest crystallinity of MZO films was observed as films were deposited at 40 mm s À1 . The UV-Vis spectra revealed that the average optical transmittance of all samples was over 60% and the energy band gap of films decreased from 3.616 to 3.254 eV with the increase in withdrawal speed. The formed Au/MZO/Au photodetectors (PDs) indicate that a device prepared at 40 mm s À1 shows superior properties both in response speed and detection capability, and the rise time is 1.871 s and fall time is 3.309 s at 365 nm for 3 V bias and the detectivity (D*) reaches $1.7 Â 10 10 Jones. Moreover, the responsivity of PDs is also affected by the distance between Au electrodes and external bias. This research provides a simple way to fabricate the UV PDs based on MZO films with faster response and higher detectivity. Experimental details Sols preparation and deposition of Mn-doped ZnO lmsPreparation process of Mn-doped ZnO (MZO) lms is that zinc acetate dehydrate [(Zn(CH 3 CO 2 ) 2 $2H 2 O), purity 99.5%]

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Effects of dopant ions on the conductivity of Ce0.75Sm0.2M0.05O1.875 (M = Al, Fe, Y, Bi) electrolytes

Cited by 11 publications

References 37 publications

Recent Progress in Applications of the Cold Sintering Process for Ceramic–Polymer Composites

Recent Progress in Applications of the Cold Sintering Process for Ceramic–Polymer Composites

Introducing a ZnO–PTFE (Polymer) Nanocomposite Varistor via the Cold Sintering Process

Structural, optical and photoelectric properties of Mn-doped ZnO films used for ultraviolet detectors

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