Published references
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These publications have a reference to ProboStat™ or other NORECS products
All 1-25 26-50 51-75 76-100 101-125 126-150 151-175 176-200 201-225 226-250 251-275 276-300 301-325 326-350 351-375 376-400 401-425 426-450 451-475 476-500 501-525 526-550 551-575 576-600 601-625 626-650 651-675 676-Development of an In Situ Surface Deformation and Temperature Measurement Technique for a Solid Oxide Fuel Cell Button Cell
ID=98| Authors |
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International Journal of Applied Ceramic Technology
Volume: 7,
Issue: 1, January/February,
Pages: 55-62 Time of Publication: 2010-01 |
| Abstract | A novel experimental technique is developed to measure the in situ surface deformation and temperature of a solid oxide fuel cell (SOFC) anode surface along with the cell electrochemical performance. The experimental setup consists of a NexTech ProboStat™ SOFC button cell test apparatus integrated with a Sagnac interferometric optical method and an infrared sensor for in situ surface deformation and temperature measurements, respectively. The button cell is fed with hydrogen or simulated coal syngas under SOFC operating conditions. The surface deformation is measured over time to estimate the anode structural degradation. The cell surface transient temperature is also monitored with different applied current densities under hydrogen and simulated coal syngas. The experimental results are useful to validate and develop SOFC structural durability and electrochemical models. |
Synthesis; Functionalization; and Environmental Stabilization of ZnO Nanobridge Transducers for Gas and Liquid-phase Sensing
ID=97| Authors |
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Sensors and Actuators B: Chemical
Volume: 155,
Issue: 1,
Pages: 245–252 Time of Publication: 2011-07 |
| Abstract | Three methods of functionalizing ZnO NW surfaces with biotin were demonstrated. Biotinylated ZnO NWs were found to dissolve during exposure to deionized (DI) water, so a chemical vapor deposition (CVD) process was developed for parylene-A, a common moisture barrier with an amine group which allows further functionalization. Parylene-A coated ZnO NWs were found to be resistant to dissolution. Electrical measurements on parylene-A coated nanobridge devices showed normal operation with higher dark current and an attenuated response to UV and O2, indicating the ability to modulate environmental sensitivity. This work demonstrates the novel use of parylene-A coatings as an encapsulation layer as well as a potential starting platform for general functionalization of ZnO NW devices for selective sensing. |
| Keywords | ZnO; Nanowires; Functionalization; Sensors |
| Remark | Link |
Correlation between microstructure and electrical conductivity in composite electrolytes containing Gd-doped ceria and Gd-doped barium cerate
ID=96| Authors |
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Journal of the European Ceramic Society
Volume: 31,
Issue: 4,
Pages: 559–568 Time of Publication: 2011-04 |
| Composite; Ceria; Impedance spectroscopy; Electrical conductivity; Fuel cell | |
| Remark | Link |
The properties of scandium and cerium stabilized zirconium thin films formed by e-beam technique
ID=94| Authors |
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Solid State Ionics
Volume: 188,
Issue: 1,
Pages: 46–49 Time of Publication: 2011-04 |
| Abstract | Scandium and ceriumstabilizedzirconium (10Sc1CeSZ) thin ceramic films were formed evaporating (ZrO2)0.89(CeO2)0.01(Sc2O3)0.10 micro powder using e-beam evaporation technique. The influence of deposition rate on formedthinfilms electrical properties and microstructure was studied. 10Sc1CeSZ thinfilms were deposited on two types of different substrates: optical quartz (SiO2) and Alloy 600 (Fe–Ni–Cr). Deposition rate was changed from 2 to 16 Å/s to understand its influence on thinfilm formation and other properties. The formed 10Sc1CeSZ thinfilms keep the cubic crystal structure as the initial evaporated powder material but change the main crystallographic peak from (111) to (200) for both types of substrate and used deposition rates. It was determined that the crystallites size increases from 19.0 to 24.9 nm and from 15.6 to 19.9 nm on optical quartz and Alloy 600 respectively by increasing the deposition rate (in range from 2 to 16 Å/s). The thinfilm density decreases by increasing the deposition rate. The ionic conductivity of 10Sc1CeSZ thinfilms was determined by impedance spectroscopy in the frequency range from 0.1 Hz to 1.0 MHz in temperature range from 473 K to 873 K. The best ionic conductivity σtot = 4.91 · 10− 2 Sm− 1 at 873 K temperature and the lowest value of activation energy ΔEa = 0.88 eV were found for 10Sc1CeSZ thinfilmsformed at 4 Å/s deposition rate. |
| Keywords | Scandium and cerium stabilized zirconium (10Sc1CeSZ); Electron beam deposition; Solid oxide fuel cells (SOFC); Ionic conductivity |
| Remark | Link |
Ethanol internal steam reforming in intermediate temperature solid oxide fuel cell
ID=93| Authors |
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Journal of Power Sources
Volume: 196,
Issue: 17,
Pages: 7355–7362 Time of Publication: 2011-09 |
| Abstract | This study investigates the performance of a standard Ni–YSZ anode supported cell under ethanolsteamreforming operating conditions. Therefore, the fuelcell was directly operated with a steam/ethanol mixture (3 to 1 molar). Other gas mixtures were also used for comparison to check the conversion of ethanol and of reformate gases (H2, CO) in the fuelcell. The electrochemical properties of the fuelcell fed with four different fuel compositions were characterized between 710 and 860 °C by I–V and EIS measurements at OCV and under polarization. In order to elucidate the limiting processes, impedance spectra obtained with different gas compositions were compared using the derivative of the real part of the impedance with respect of the natural logarithm of the frequency. Results show that internalsteamreforming of ethanol takes place significantly on Ni–YSZ anode only above 760 °C. Comparisons of results obtained with reformate gas showed that the electrochemical cell performance is dominated by the conversion of hydrogen. The conversion of CO also occurs either directly or indirectly through the water–gas shift reaction but has a significant impact on the electrochemical performance only above 760 °C. |
| Keywords | SOFC; Ni–YSZ anode; Ethanol; Internal reforming; Coking; Impedance spectroscopy |
| Remark | Link |
Synthesis and electrical properties of Gd2MO5 (M = Zr, Hf)
ID=92| Authors |
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Neorganicheskie Materialy
Volume: Vol. 46, No. 12,
Pages: pp. 1476–1482 Time of Publication: 2010-08 |
| Abstract | Polycrystalline Gd2ZrO and Gd2HfO5 have been prepared by heat-treating coprecipitated oxide mixtures, and their order-disorder phase transitions have been studied in the range 20–1600°C. The materials have been shown to consist of nanostructured grains with a nanodomain size of ∼40 nm. Their electrical conductivity has been determined by impedance spectroscopy in air between 300 and 1000°C. The 1000°C conductivities of Gd2ZrO5 and Gd2HfO5 are 3.7 × 10−3 and 1.8 × 10−3 S/cm, and the respective effective activation energies are 1.37 and 1.56 eV. |
Proton Conductivity in Mixed B-Site Doped Perovskite Oxide BaZr0.5In0.25Yb0.25O3−delta
ID=91| Authors |
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J. Electrochem. Soc.
Volume: Volume 157,
Issue: Issue 12,
Pages: B1819-B182 Time of Publication: 2010-12 |
| Abstract | A wet chemical route was used to prepare the oxygen deficient codoped perovskite oxide BaZr0.5In0.25Yb0.25O3−. Analysis of X-ray powder diffraction data showed that the sample belongs to the cubic crystal system with space group Pmm. Dynamic thermogravimetric (TG) analysis confirmed complete filling of oxygen vacancies (V) by protonic defects (OH) during the hydration process. The proton conductivity was investigated by impedance spectroscopy. The bulk and total conductivities of prehydrated BaZr0.5In0.25Yb0.25O3− were found to be 8.5×10−4 and 2.2×10−5 S cm−1, respectively, at 300°C. The total conductivity in the codoped perovskite oxide was higher compared to that of the respective single doped perovskite oxides with the same doping level. The bulk and grain-boundary mobility and diffusion coefficients of protons were calculated at 200°C using impedance and TG data to obtain the conductivity and proton concentration, respectively. The high bulk diffusivity (2.3×10−7 cm2 s−1) was obtained which indicates that the protons are more free to move in the heavily doped matrix compared to the lightly doped systems where trapping of protons occurs. |
| Keywords | barium compounds, proton exchange membrane fuel cells, thermal analysis, vacancies (crystal), X-ray diffraction, zirconium compounds |
| Remark | Link |
Electrical Conductivity of Nanostructured Fluorite-Like Sc2Ti3O12
ID=89| Authors |
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Inorganic Materials
Volume: 45,
Issue: 5,
Pages: 543-549 Time of Publication: 2009 |
| Abstract | Single-crystal and polycrystalline samples of Sc4Ti3O12 have been shown to contain nanodomains (10–50 nm) with different degrees of ordering, coherent with the fluorite-like matrix. The oxygen-ion conductivity of this compound has been determined in the range 300–1000°C in air using impedance spectroscopy. The nanostructured single-crystal and polycrystalline samples are close in the activation energy for bulk conduction at both low and high temperatures: ≃1.26 and 1.29 eV in the range 300–775°C, ≃1.98 and 2.07 eV in the range 775–1000°C. |
Hydrogen sensitivity of doped CuO/ZnO heterocontact sensors
ID=88| Author |
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Sensors and Actuators B: Chemical
Volume: 106,
Issue: 2,
Pages: 837-842 Time of Publication: 2005 |
| Abstract | Heterocontact sensors based on p-type CuO and n-type ZnO ceramics have been shown to exhibit a high sensitivity to reducing gas species and an intrinsic selectivity. In this work, doped heterocontact sensors were prepared via solid state synthesis routes. CuO was doped with various monovalent (Li, Na) and isovalent (Ca, Sr, Ni) dopants at different compositions to form both single phase and two phase samples. Effects of dopants on hydrogen sensitivity through conductivity and heterogeneous microstructure were investigated using dc current–voltage measurements and ac impedance analysis. It was observed that both monovalent and divalent dopants increased the hydrogen sensitivity significantly. The highest sensitivity was observed in a 2.5 mol% Ni-CuO/ZnO heterocontact and low amounts of Li doping were shown to greatly enhance the rectifying characteristics. |
| Keywords | Hydrogen sensor; Heterocontact; CuO; ZnO |
Synthesis, densification and electrical properties of strontium cerate ceramics
ID=87| Authors |
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Journal of the European Ceramic Society
Volume: 27,
Issue: 16,
Pages: 4461-4471 Time of Publication: 2007 |
Stability and conductivity study of the BaCe0.9−xZrxY0.1O2.95 systems
ID=86| Author |
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Solid State Ionics
Volume: 178,
Issue: 3-4,
Pages: 213-220 Time of Publication: 2007 |
Defects and transport properties in Ln6WO12 (Ln = La, Nd, Gd, Er)
ID=85| Author |
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Solid State Ionics
Volume: 178,
Issue: 7-10,
Pages: 555-560 Time of Publication: 2007 |
Phase transitions and ferroelectric properties in BiScO3-Bi(Zn1/2Ti1/2)O3-BaTiO3 solid solutions
ID=84| Authors |
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Journal of Applied Physics
Volume: 102,
Issue: 4,
Pages: 044103 Time of Publication: 2007 |
Shrinkage Effects of the Conduction Zone in the Electrical Properties of Metal Oxide Nanocrystals: The Basis for Room Temperature Conductometric Gas Sensor
ID=83| Authors |
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Journal of Sensors
Volume: 2009,
Pages: 1-7, doi:10.1155/2009/783675 Time of Publication: 2009 |
Preparation, electrical and thermal properties of new exfoliated graphite-based composites
ID=82| Authors |
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Carbon
Volume: 47,
Issue: 1,
Pages: 263-270 Time of Publication: 2009 |
Structure, defect chemistry, and proton conductivity in nominally Sr-doped Ba3La(PO4)3
ID=81| Authors |
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Solid State Ionics
Volume: 180,
Issue: 4-5,
Pages: 338-342 Time of Publication: 2009 |
Local structure and ionic conductivity in the Zr2Y2O7–Y3NbO7 system
ID=80| Authors |
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Journal of Physics: Condensed Matter
Volume: 21,
Issue: 21,
Pages: 215401 Time of Publication: 2009 |
Thin film chemical sensors based on p-CuO/n-ZnO heterocontacts
ID=79| Authors |
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Thin Solid Films
Volume: 517,
Issue: 15,
Pages: 4448-4454 Time of Publication: 2009 |
Phase formation, microstructure, and dielectric properties of (1 − x)PZT–(x)PCN ceramics
ID=78| Authors |
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Materials Letters
Volume: 63,
Issue: 15,
Pages: 1281-1284 Time of Publication: 2009 |
Characterization of porous lanthanum strontium manganite (LSM) and development of yttria stabilized zirconia (YSZ) coating
ID=77| Authors |
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Ceramics International
Volume: 35,
Issue: 6,
Pages: 2493-2497 Time of Publication: 2009 |
Ordering processes in Ln2TiO5 (Ln = Dy–Lu): The role of thermal history
ID=76| Authors |
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Journal of Alloys and Compounds
Volume: 479,
Issue: 1-2,
Pages: 6-10 Time of Publication: 2009 |
Effects of Zr/Ti ratio on dielectric and ferroelectric properties of 0.8Pb(ZrxTi1−x)O3–0.2Pb(Co1/3Nb2/3)O3 ceramics
ID=75| Authors |
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Current Applied Physics
Volume: 9,
Issue: 4,
Pages: 802-806 Time of Publication: 2009 |
Ce0.9Sr0.1VOx (x = 3, 4) as anode materials for H2S-containing CH4 fueled solid oxide fuel cells
ID=74| Authors |
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Journal of Power Sources
Volume: 192,
Issue: 2,
Pages: 247-257 Time of Publication: 2009 |
Acceptor doping of Ln2Ti2O7 (Ln = Dy, Ho, Yb) pyrochlores with divalent cations (Mg, Ca, Sr, Zn)
ID=73| Authors |
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Materials Research Bulletin
Volume: 44,
Issue: 8,
Pages: 1613-1620 Time of Publication: 2009 |
Effect of substitution with Cr3+ and addition of Ni on the physical and electrochemical properties of Ce0.9Sr0.1VO3 as a H2S-active anode for solid oxide fuel cells
ID=72| Authors |
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Journal of Power Sources
Volume: 194,
Issue: 1,
Pages: 252-262 Time of Publication: 2009 |
