Thermochemical stability and nonstoichiometry of erbia-stabilized bismuth oxide
نویسندگان
چکیده
منابع مشابه
Thermochemical stability and nonstoichiometry of erbia-stabilized bismuth oxide
A phase study has been performed of high oxygen ion conducting erbia-stabilized bismuth oxide ( 1 -x)Bi203.xEr203 (BElOOx ) using thermal analysis and X-ray powder diffraction. Investigation of the effect of a long-time (500 h) anneal of samples at 650°C in air revealed that the minimum amount of erbia needed to stabilize the high-temperature cubic 8-Biros phase is 27.5 at%. This boundary value...
متن کاملThermochemical Stability and Nonstoichiometry of Yttria-stabilized Bismuth Oxide Solid Solutions
The thermochemlcal stablllty of fast oxygen ion conductlng yttria stabillzed blsmuthoxlde (YSB) r solld solutlons containing 22.0 32.5 mol% of yttrla was investigated. It was shown that In the temperature range between 650 740 C the stabilized cublc ~ -phase contalnlng less than 31.8 mol% of yttrla ls not stable durlng long term annealing treatments (>~500 hours). During annealing at 650 C a sl...
متن کاملOxygen surface exchange kinetics of erbia-stabilized bismuth oxide
The surface oxygen exchange kinetics of bismuth oxide stabilized with 25 mol% erbia (BE25) has been studied in the temperature and pO2 ranges 773–1,023 K and 0.1– 0.95 atm, respectively, using pulse-response O–O isotope exchange measurements. The results indicate that BE25 exhibits a comparatively high exchange rate, which is rate determined by the dissociative adsorption of oxygen. Defect chem...
متن کاملThree-electrode current-voltage measurements on erbia stabilized bismuth oxide with co-pressed gold gauze electrodes
The polarization behaviour of (Biz03)0.,5(Er,0,),,25(BE25) with a co-pressed gold gauze electrode was studied as a function of temperature and oxygen partial pressure in a three electrode cell. The anodic polarization is smaller than the cathodic polarization. The cathodic charge transfer coefficient, (Y,, is about 0.5 while the anodic one, (Y., is about 1.5. The exchange current density shows ...
متن کاملSolid State lonics 40/41 (1990) 886-888 North-Holland OXYGEN TRANSPORT AND TRANSFER PROPERTIES OF ERBIA-STABILIZED BISMUTH OXIDE
The electrode resistances of solid solutions of 75 tool% Bi203-25 tool% Er203 with sputtered and with copressed gold gauze electrodes were compared. In contrast with literature no enhancement of the electrode process could be observed for the copressed electrodes. The measurements show an oxygen partial pressure dependence of power -0.5 for the electrode resistance. Additionally ~sO 2 exchange ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Solid State Ionics
سال: 1992
ISSN: 0167-2738
DOI: 10.1016/0167-2738(92)90051-p