Bi(Pb)-2223 phase formation in Ag-sheathed tapes: the role of oxygen partial pressure during sintering

1998 ◽  
Vol 11 (2) ◽  
pp. 238-243 ◽  
Author(s):  
J Müller ◽  
O Eibl ◽  
B Fischer ◽  
P Herzog
Keyword(s):  
Oxygen Partial Pressure ◽  
Partial Pressure ◽  
Phase Formation

Role of oxygen partial pressure and seed layer chemistry in flux mediated epitaxy of single phase multiferroic BiFeO3 thin films

2008 ◽  
Vol 93 (19) ◽  
pp. 192906 ◽  
Author(s):  
Varatharajan Anbusathaiah ◽  
Ching Jung Cheng ◽  
Sung Hwan Lim ◽  
Makoto Murakami ◽  
Lourdes G. Salamanca-Riba ◽  
...  
Keyword(s):  
Thin Films ◽  
Oxygen Partial Pressure ◽  
Partial Pressure ◽  
Seed Layer ◽  
Single Phase ◽  
Bifeo3 Thin Films ◽  
Multiferroic Bifeo3

Oxidation of 1-butene and butadiene to maleic anhydride. 1. Role of oxygen partial pressure

1983 ◽  
Vol 22 (4) ◽  
pp. 565-570 ◽  
Author(s):  
Fabrizio Cavani ◽  
Gabriele Centi ◽  
Italo Manenti ◽  
Alfredo Riva ◽  
Ferruccio Trifiro
Keyword(s):  
Maleic Anhydride ◽  
Oxygen Partial Pressure ◽  
Partial Pressure

Role of Oxygen Vacancies on the Ferroelectric Properties of Pzt Thin Films

1991 ◽  
Vol 243 ◽  
Author(s):  
Chi Kong Kwok ◽  
Seshu B. Desu
Keyword(s):  
Thin Films ◽  
Oxygen Partial Pressure ◽  
Partial Pressure ◽  
Vacancy Concentration ◽  
Ferroelectric Properties ◽  
Sol Gel ◽  
Low Oxygen ◽  
Partial Pressures ◽  
Pzt Films

AbstractThe properties of ferroelectric thin films can be significantly influenced by the presence of point defects. The concentration of vacancies presented in these thin films is known to be one of the key parameters causing the degradation of these films when these films are subjected to polarization reversals.To study the effects of the vacancy concentration on the ferroelectric properties, sol gel PZT films and powders were annealed in different oxygen partial pressures. For the PZT films, the reduction of oxides to pure metals was not observed even with films annealed at 2×10−5 atmosphere of oxygen partial pressure. Samples annealed at low oxygen partial pressure (for instance, 10−3 and 2×10−5 atmosphere), which has more Pb and O2 depletions and consequently has more Pb and O2 vacancies, cannot be switched easily. The ratios of coercive field after and before fatigue increase as the defect concentrations of the annealed samples increase.

Role of the oxygen partial pressure on the properties of undoped tin oxide films deposited at low temperature

2008 ◽  
Vol 205 (8) ◽  
pp. 1957-1960
Author(s):  
P. Parreira ◽  
J. Valente ◽  
G. Lavareda ◽  
C. Nunes de Carvalho ◽  
A. R. Ramos ◽  
...  
Keyword(s):  
Low Temperature ◽  
Oxygen Partial Pressure ◽  
Partial Pressure ◽  
Tin Oxide ◽  
Oxide Films ◽  
Tin Oxide Films

Hip Phase Diagram of YBCO Type Superconductor

1991 ◽  
Vol 251 ◽  
Author(s):  
Yuichi Sawai ◽  
K. Ishizaki ◽  
M. Takata ◽  
A. Kuzjukevics ◽  
Y. Narukawa
Keyword(s):  
Phase Diagram ◽  
Oxygen Partial Pressure ◽  
Partial Pressure ◽  
Phase Formation ◽  
Gas Pressure ◽  
Boundary Line ◽  
Temperature Phase ◽  
Formation Temperature ◽  
Oxidation Reactions ◽  
Temperature Phase Diagram

ABSTRACTThe oxygen partial pressure - temperature phase diagram of YBCO type superconductors reported before by us showed that the YBa2Cu4Ox phase formation from Y2Ba4Cu7Oz with CuO, as well as from YBa2Cu3Oy, with CuO are oxidation reactions. The total gas pressure - temperature phase diagram shows that the YBa2Cu4Ox, phase formation temperature from Y2Ba4Cu7Oz with CuO increases with increasing the total gas pressure. On this phase boundary line, the fugacity of oxygen increases with increasing the total gas pressure even at constant oxygen partial pressure.

Antioxidant and Prooxidant Role of β-Carotene in Murine Normal and Tumor Thymocytes: Effects of Oxygen Partial Pressure

1997 ◽  
Vol 22 (6) ◽  
pp. 1065-1073 ◽  
Author(s):  
Paola Palozza ◽  
Chiara Luberto ◽  
Gabriella Calviello ◽  
Paola Ricci ◽  
Gianna Maria Bartoli
Keyword(s):  
Oxygen Partial Pressure ◽  
Partial Pressure ◽  
Β Carotene

scholarly journals Role of the oxygen partial pressure in the formation of composite Co-CoO nanoparticles by reactive aggregation

2011 ◽  
Vol 13 (10) ◽  
pp. 4583-4590 ◽  
Author(s):  
J. A. De Toro ◽  
J. P. Andrés ◽  
J. A. González ◽  
J. M. Riveiro ◽  
M. Estrader ◽  
...  
Keyword(s):  
Oxygen Partial Pressure ◽  
Partial Pressure ◽  
Coo Nanoparticles
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