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Number of results

Journal

2013 | 11 | 12 | 2088-2097

Article title

CaZrO3-based powders suitable for manufacturing electrochemical oxygen probes

Content

Title variants

Languages of publication

EN

Abstracts

EN
Calcium zirconate powders doped with a small amount of CaO were synthesised using the Pechini method. X-ray analysis revealed that solid solution was formed in the concentration up to 51.5% mol CaO. For synthesis of stoichiometric CaZrO3, the highest temperature was required (1150°C), but introduction of excess CaO from 50.5 to 51.5% mol enabled us to lower the synthesis temperature to 800°C. The sintering behaviour of such samples under non-isothermal conditions was studied by dilatometric methods. Deviations were found in stoichiometry; by increasing the CaO concentration in CaZrO3 sinterability improved in comparison to CaZrO3 with stoichiometric composition. The presence of CaO as second phase caused deterioration of the sinterability of the CaZrO3-based samples. Pellets sintered at 1500°C for 2 h reached 96–98% of theoretical density. SEM and TEM observations were used to characterise the microstructure of the prepared samples. The electrical properties of CaZrO3-based samples were investigated by the AC-impedance spectroscopy method. It was found that introduction of excess CaO into the CaZrO3 structure caused an increase in ionic conductivity up to the solubility limit. The possibility of using CaZrO3-based samples for constructing prototype electrochemical oxygen probes to determine activity of oxygen dissolved in molten copper is also demonstrated. [...]

Publisher

Journal

Year

Volume

11

Issue

12

Pages

2088-2097

Physical description

Dates

published
1 - 12 - 2013
online
26 - 9 - 2013

Contributors

  • Faculty of Fuels and Energy, AGH-University of Science and Technology, 30-059, Cracow, Poland
  • Faculuty of Materials Science and Ceramics, AGH-University of Science and Technology, 30-059, Cracow, Poland

References

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Document Type

Publication order reference

Identifiers

YADDA identifier

bwmeta1.element.-psjd-doi-10_2478_s11532-013-0332-2
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