Sol–gel synthesis and protonic conductivity of yttrium doped barium cerate

Kulkarni, Shrikant; Duttagupta, Siddhartha P.; Phatak, Girish

doi:10.1007/s10971-014-3581-4

Cited by 6 publications

(3 citation statements)

References 19 publications

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“…The m coefficient obtained for R p is much smaller than the value of 0.10 reported for a BSCF cathode examined with an SDC electrolyte [42]. This indicates that, in the case of a 5CBCY|BSCF interface, the two slowest oxygen reaction [35] 0.015 0.040 [36] 0.008 0.019 [37] steps both involve an O 2ion rather than molecular or atomic oxygen [43]. The polarisation resistance is dependent to a slight degree on oxygen partial pressure and falls within a range from 0.24 to 0.30 X cm 2 in the examined oxygen concentrations.…”

Section: Resultsmentioning

confidence: 67%

“…The conditions applied to powder preparation and the formation of shapes and sintering of ceramic parts exert a considerable impact on the creation of their microstructure under the applied thermal treatment conditions. The humidity level of the air during electrical conductivity (r) measurements also has a great impact on the slight differences visible in the electrical conductivity values presented in Table 2 [35][36][37]. Figure 11 presents the voltage (U)-current (I) dependence recorded for 5CBCY-electrolyte-supported solid oxide fuel cells.…”

Section: Resultsmentioning

confidence: 99%

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Utilisation of methylcellulose as a shaping agent in the fabrication of Ba0.95Ca0.05Ce0.9Y0.1O3 proton-conducting ceramic membranes via the gelcasting method

Dudek

Lis

Kocyło

et al. 2019

J Therm Anal Calorim

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The gelcasting method was used to form gastight Ba 0.95 Ca 0.05 Ce 0.9 Y 0.1 O 3 samples proposed for use as proton-conducting electrolytes in solid oxide fuel cells. Methylcellulose was used as an environmentally friendly shaping agent for Ba 0.95-Ca 0.05 Ce 0.9 Y 0.1 O 3 powder in an ethanol solution. Samples of Ba 0.95 Ca 0.05 Ce 0.9 Y 0.1 O 3 were also prepared from the same powder via traditional isostatic pressing, as a reference for cast samples, and sintered in the same conditions. Comparative studies of the physicochemical properties of Ba 0.95 Ca 0.05 Ce 0.9 Y 0.1 O 3 electrolytes, formed by means of these two methods and then sintered at 1550°C for 2.5 h, were presented and discussed. Using the X-ray diffraction method, only the pure orthorhombic phase of BaCe 0.9 Y 0.1 O 3 was detected in the Ba 0.95 Ca 0.05 Ce 0.9 Y 0.1 O 3 powder, as well as in the Ba 0.95-Ca 0.05 Ce 0.9 Y 0.1 O 3 sintered pellets formed via both gelcasting (A) and isostatic pressing (B). Thermal effects occurring during heating of methylcellulose, as well as ceramic Ba 0.95 Ca 0.05 Ce 0.9 Y 0.1 O 3 powder, dried cast samples obtained from the prepared slurry, and sintered Ba 0.95 Ca 0.05 Ce 0.9 Y 0.1 O 3 samples, were examined by differential scanning calorimetry, differential thermal analysis, thermogravimetric analysis, and evolved gas analysis of volatile products using a quadrupole mass spectrometer. The measurements were performed within the temperature range of 20-1200°C in air. Based on dilatometric tests, it was found that the Ba 0.95 Ca 0.05 Ce 0.9 Y 0.1 O 3 cast samples exhibited slightly higher degree of sinterability than the 5CBCY samples obtained by isostatic pressing. In comparison with pressed pellets, higher values of total electrical conductivity in air or in a gas mixture of 5% H 2 in Ar were also attained for Ba 0.95 Ca 0.05 Ce 0.9 Y 0.1 O 3 cast samples. The Ba 0.95 Ca 0.05 Ce 0.9 Y 0.1 O 3 samples were used to construct oxygen-hydrogen electrolytes for solid oxide fuel cells. The results of the electrochemical performance of solid oxide fuel cells with Ba 0.95 Ca 0.05 Ce 0.9 Y 0.1 O 3 electrolytes were comparable to the data in the literature on BaCe 0.9 Y 0.1 O 3 electrolytes. An electrochemical study of a Ba 0.5 Sr 0.5-Co 0.8 Fe 0.2 O 3-d |Ba 0.95 Ca 0.05 Ce 0.9 Y 0.1 O 3 interface was also performed. Ba 0.5 Sr 0.5 Co 0.8 Fe 0.2 O 3-d appears to be a suitable cathode material for a Ba 0.95 Ca 0.05 Ce 0.9 Y 0.1 O 3 electrolyte.

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Section: Resultsmentioning

confidence: 67%

Section: Resultsmentioning

confidence: 99%

Utilisation of methylcellulose as a shaping agent in the fabrication of Ba0.95Ca0.05Ce0.9Y0.1O3 proton-conducting ceramic membranes via the gelcasting method

Dudek

Lis

Kocyło

et al. 2019

J Therm Anal Calorim

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“…İtriyum katkılı baryum serat [25][26][27], kadmiyum oksit [28], kobalt-çinko ferrit [29] ve baryum zirkonat [30][31][32][33][34][35][36] ile ilgili pek çok çalışma mevcutken, itriyum (Y) katkılı gadolinyum oksit senteziyle ilgili bir çalışmaya rastlanmamıştır.…”

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İtriyum Katkılı Gadolinyum Oksit Numunelerinin Sentez ve Karakterizasyonu

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Korkmaz

Bulut

et al. 2022

Bilecik Şeyh Edebali Üniversitesi Fen Bilimleri Dergisi

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Bu çalışmada, yaş kimyasal sentez ile üretilen katkısız ve itriyum (Y) katkılı gadolinyum oksit (Gd2O3) yapıların karakterizasyonu hakkında detaylı bilgi sunuldu. Numunelerin karakterizasyonu için, X-ışını kırınımı analizi, Fourier dönüşümlü kızılötesi spektroskopisi ve taramalı elektron mikroskopi tekniği kullanıldı. Örgü parametresinin, kristal büyüklüğünün ve kristalleşme derecesinin Y miktarıyla değişim gösterdiği gözlendi. Numunelerin kristal büyüklükleri, 31,17 nm ile 35,49 nm aralığında hesaplandı. Numunelerin kristalleşme değerleri, % 88,6 ile % 90,2 aralığında bulunmuştur. Gd2O3'ün morfolojisinin Y miktarından etkilendiği belirlendi.

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