Enhancement of autotrophic growth rate ofAlcaligenes eutrophus in a medium containing perfluorocarbon under low oxygen partial pressure

1992 ◽  
Vol 14 (8) ◽  
pp. 733-736 ◽  
Author(s):  
Shinjiro Yamamoto ◽  
Hiroyuki Honda ◽  
Naohiro Shiragami ◽  
Hajime Unno
Keyword(s):  
Growth Rate ◽  
Oxygen Partial Pressure ◽  
Partial Pressure ◽  
Autotrophic Growth ◽  
Low Oxygen

Floating zone partial melting and solidification of SmBCO superconductor under low oxygen partial pressure

1998 ◽  
Vol 13 (10) ◽  
pp. 2807-2818 ◽  
Author(s):  
M. Sumida ◽  
S. Matsuoka ◽  
Y. Shiohara ◽  
T. Umeda
Keyword(s):  
Growth Rate ◽  
Critical Current Density ◽  
Oxygen Partial Pressure ◽  
Partial Pressure ◽  
Partial Melting ◽  
Floating Zone ◽  
Low Oxygen ◽  
Initial Composition ◽  
Oxygen Annealing ◽  
Melting And Solidification

Microstructure control of SmBCO superconductor was carried out using the floating zone partial melting and solidification method under 0.01 atm oxygen partial pressure which is a preferable atmosphere to obtain a crystal with stoichiometric SmBCO. The growth rate, initial composition, and addition of small amount of platinum dependences on the microstructure formations of the (Sm211 + L) mixture during melting and the Sm123 or Sm123/211 during solidification were investigated. Furthermore, superconductive properties of the solidified Sm123/211 were measured by SQUID after appropriate oxygen annealing. Estimated critical current density of the single crystalline Sm123/211 was 3.6 × 104 A/cm at 77 K, 1 T.

Quantitative evaluation of the oxidation behavior of ZrB2-15 vol.%SiC at a low oxygen partial pressure

Vacuum ◽  
2013 ◽  
Vol 88 ◽  
pp. 98-102 ◽  
Author(s):  
Ai Momozawa ◽  
Rong Tu ◽  
Takashi Goto ◽  
Yuuki Kubota ◽  
Hiroshi Hatta ◽  
...  
Keyword(s):  
Oxygen Partial Pressure ◽  
Partial Pressure ◽  
Quantitative Evaluation ◽  
Oxidation Behavior ◽  
Low Oxygen

Enhanced superconductivity in Nd1+xBa2-xCu3O7+δby low oxygen partial pressure annealing

1994 ◽  
Vol 23 (11) ◽  
pp. 1117-1120 ◽  
Author(s):  
M. J. Kramer ◽  
A. Karion ◽  
K. W. Dennis ◽  
M. Park ◽  
R. W. McCallum
Keyword(s):  
Oxygen Partial Pressure ◽  
Partial Pressure ◽  
Low Oxygen ◽  
Enhanced Superconductivity

Tensile Properties and Creep Behavior of SiC-Based Fibers under Various Oxygen Partial Pressures

2005 ◽  
Vol 475-479 ◽  
pp. 1333-1336 ◽  
Author(s):  
Jan Ji Sha ◽  
J.S. Park ◽  
Tatsuya Hinoki ◽  
Akira Kohyama ◽  
J. Yu
Keyword(s):  
Oxygen Partial Pressure ◽  
Partial Pressure ◽  
Tensile Properties ◽  
Creep Behavior ◽  
Elevated Temperatures ◽  
Low Oxygen ◽  
X Ray Diffraction ◽  
Sic Fibers ◽  
Partial Pressures ◽  
Ar Gas

Three kinds of atmospheres (air, highly-pure Ar and ultra highly-pure Ar gas) with different oxygen partial pressures were applied to investigate the tensile properties and creep behavior of SiC fibers such as Hi-NicalonTM and TyrannoTM-SA. These fibers were annealed and crept at elevated temperatures ranging from1273-1773 K in such environments. After annealing at 1773 K, the room temperature tensile strengths of SiC-based fibers decreased with decreasing the oxygen partial pressure and the near stoichiometric fiber TyrannoTM-SA shows excellent strength retention. At temperatures above the 1573 K, the creep resistance of SiC fibers evaluated by bending stress relaxation (BSR) method under high oxygen partial pressure was lower than that of in low oxygen partial pressure. The microstructural features on these fibers were examined by scanning electron microscopy (SEM) and X-ray diffraction (XRD).

Preparation of NdBaCuO superconductor by zone-melting under low oxygen partial pressure

2003 ◽  
Vol 386 ◽  
pp. 241-244 ◽  
Author(s):  
Zhanguo Fan ◽  
Weiying Gao ◽  
Fenghua Li ◽  
Jue Wang ◽  
Deahua Soh
Keyword(s):  
Oxygen Partial Pressure ◽  
Partial Pressure ◽  
Zone Melting ◽  
Low Oxygen
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