Oxygen bubble–templated anodic deposition of porous PbO 2

2015 ◽  
Vol 60 ◽  
pp. 144-147 ◽  
Author(s):  
Nicola Comisso ◽  
Sandro Cattarin ◽  
Paolo Guerriero ◽  
Luca Mattarozzi ◽  
Marco Musiani ◽  
...  
Keyword(s):  
Oxygen Bubble ◽  
Anodic Deposition

Preparation of porous oxide layers by oxygen bubble templated anodic deposition followed by galvanic displacement

2017 ◽  
Vol 253 ◽  
pp. 11-20 ◽  
Author(s):  
Nicola Comisso ◽  
Lidia Armelao ◽  
Sandro Cattarin ◽  
Paolo Guerriero ◽  
Luca Mattarozzi ◽  
...  
Keyword(s):  
Galvanic Displacement ◽  
Oxide Layers ◽  
Oxygen Bubble ◽  
Porous Oxide ◽  
Anodic Deposition

Electrochemical Behaviour of Porous PbO 2 Layers Prepared by Oxygen Bubble Templated Anodic Deposition

2016 ◽  
Vol 200 ◽  
pp. 259-267 ◽  
Author(s):  
Nicola Comisso ◽  
Sandro Cattarin ◽  
Paolo Guerriero ◽  
Luca Mattarozzi ◽  
Marco Musiani ◽  
...  
Keyword(s):  
Electrochemical Behaviour ◽  
Oxygen Bubble ◽  
Anodic Deposition

Direct observations of radiation-enhanced transformations in glass

1983 ◽  
Vol 41 ◽  
pp. 354-355
Author(s):  
J. F. DeNatale ◽  
D. G. Howitt
Keyword(s):  
Glass Matrix ◽  
Diffusion Mechanism ◽  
Bubble Formation ◽  
Silicate Glasses ◽  
Phase Decomposition ◽  
Direct Observations ◽  
Thin Foils ◽  
Oxygen Bubble ◽  
Electron Energy Loss ◽  
Kinetics Of

The electron irradiation of silicate glasses containing metal cations produces various types of phase separation and decomposition which includes oxygen bubble formation at intermediate temperatures figure I. The kinetics of bubble formation are too rapid to be accounted for by oxygen diffusion but the behavior is consistent with a cation diffusion mechanism if the amount of oxygen in the bubble is not significantly different from that in the same volume of silicate glass. The formation of oxygen bubbles is often accompanied by precipitation of crystalline phases and/or amorphous phase decomposition in the regions between the bubbles and the detection of differences in oxygen concentration between the bubble and matrix by electron energy loss spectroscopy cannot be discerned (figure 2) even when the bubble occupies the majority of the foil depth.The oxygen bubbles are stable, even in the thin foils, months after irradiation and if van der Waals behavior of the interior gas is assumed an oxygen pressure of about 4000 atmospheres must be sustained for a 100 bubble if the surface tension with the glass matrix is to balance against it at intermediate temperatures.

Multiple layer formation in the anodic deposition of Hg2C2O4

1987 ◽  
Vol 227 (1-2) ◽  
pp. 147-158 ◽  
Author(s):  
C. Müller ◽  
J. Claret ◽  
M. Sarret
Keyword(s):  
Layer Formation ◽  
Multiple Layer ◽  
Anodic Deposition

ELECTRONIC STATE CALCULATION OF MANGANESE DIOXIDE ELECTRODE WITH ADDITIVE TRANSITION METALS

2006 ◽  
Vol 20 (25n27) ◽  
pp. 4255-4260 ◽  
Author(s):  
BONG-SEO KIM ◽  
SU-DONG PARK ◽  
HEE-WOONG LEE ◽  
DONG-YOON LEE ◽  
WON-SUB CHUNG
Keyword(s):  
Electrical Conductivity ◽  
Transition Metals ◽  
Theoretical Calculation ◽  
Manganese Dioxide ◽  
Cluster Model ◽  
Electronic States ◽  
Deposition Method ◽  
Energy Band Gap ◽  
Anodic Deposition ◽  
Better Than

The electronic states of manganese dioxide substituted with transition metals were theoretically calculated by DV-Xα method, cluster model was Mn 15 O 56 and Mn 14 XO 56 (X = transition metal). The energy band gap of manganese-X oxides is lower than that of manganese dioxide from theoretical calculation. Also it is identified that the electrical conductivity of manganese-tungsten oxide is better than that of manganese dioxide from experiment of anodic deposition method. It is confirmed that the theoretical calculation coincides with experimental results.

Synergistic effect of nitrate content and ethanol on photo-assisted anodic deposition of ceria thin films

2017 ◽  
Vol 627 ◽  
pp. 44-52 ◽  
Author(s):  
Yumeng Yang ◽  
Yang Yang ◽  
Xiaoqing Du ◽  
Yu Chen ◽  
Zhongnian Yang ◽  
...  
Keyword(s):  
Thin Films ◽  
Synergistic Effect ◽  
Nitrate Content ◽  
Anodic Deposition

Gas dispersion in the oxygen delignification process

TAPPI Journal ◽  
2021 ◽  
Vol 20 (5) ◽  
pp. 311-318
Author(s):  
JARI KAYHKO ◽  
HEIKKI MUTIKAINEN ◽  
KARI PELTONEN ◽  
RIKU KOPRA ◽  
MARKUS HONKANEN
Keyword(s):  
Bubble Size ◽  
Oxygen Delignification ◽  
Noticeable Effect ◽  
Gas Dispersion ◽  
New Information ◽  
Oxygen Bubble ◽  
The Mean ◽  
Mixer Rotation ◽  
Reactor Pressure

There has been very little knowledge about the state of gas dispersion in the oxygen delignification process, even though this has a major impact on the performance of the reactor. This paper presents a new continu-ous inline method for measuring oxygen bubble size distribution in the reactor, as well as results from studies con-ducted in softwood and hardwood lines. This new measurement worked well, and new information about oxygen bubble size, as well as how different reactor conditions affected the distribution, was obtained. For example: • In the softwood line, the mean volume-weighted bubble size was about 0.1 mm, whereas in the hardwood line, this size was almost 10 times higher. For both lines, there was considerable variation in the measured bubble size over the long term. • For both lines, an increase in mixer rotation speed caused a discernible decrease in the bubble size, and an increase in oxygen charge caused a discernible increase in the bubble size. • In the softwood line, no coalescence of the bubbles in the reactor was observed, but in the hardwood line, some coalescence of the larger bubbles occurred. • In the test conducted in the hardwood line, the use of brownstock washer defoamer caused a discernible increase in oxygen bubble size. • In the hardwood line, reactor pressure had a noticeable effect on the amount of delignification, which indicated that improving mass transfer of oxygen (e.g., by decreasing the oxygen bubble size, in this case) should also have an increasing effect on the delignification.

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