The mobility of proton carriers in phosphate glasses depends on polymerization of the phosphate framework

2017 ◽  
Vol 19 (43) ◽  
pp. 29669-29675 ◽  
Author(s):  
Takuya Yamaguchi ◽  
Takuya Kataoka ◽  
Satoshi Tsukuda ◽  
Tomohiro Ishiyama ◽  
Junji Nishii ◽  
...  
Keyword(s):  
Chain Length ◽  
Phosphate Glasses ◽  
Ion Content ◽  
Proton Mobility

Proton mobility increases with shorter (PO3−)n chain length and decreases as the P2O74− ion content increases in the framework.

Investigating the role of GeO2 in enhancing the thermal stability and proton mobility of proton-conducting phosphate glasses

2021 ◽  
Author(s):  
Takahisa Omata ◽  
Aman Sharma ◽  
Takuya Kinoshita ◽  
Issei Suzuki ◽  
Tomohiro Ishiyama ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Glass Transition ◽  
Transition Temperature ◽  
Glass Transition Temperature ◽  
Phosphate Glasses ◽  
Proton Mobility ◽  
Proton Conducting

In this study, the effect of GeO2 on the thermal stability and proton mobility (μH) of proton-conducting phosphate glasses was experimentally investigated using 22HO1/2−3NaO1/2−(12−x)LaO3/2−xGeO2−63PO5/2 glasses. Increasing glass transition temperature (Tg)...

Proton transport properties of proton-conducting phosphate glasses at their glass transition temperatures

2019 ◽  
Vol 21 (20) ◽  
pp. 10744-10749 ◽  
Author(s):  
Takahisa Omata ◽  
Takuya Yamaguchi ◽  
Satoshi Tsukuda ◽  
Tomohiro Ishiyama ◽  
Junji Nishii ◽  
...  
Keyword(s):  
Glass Transition ◽  
Transition Temperature ◽  
Glass Transition Temperature ◽  
Transport Properties ◽  
Proton Transport ◽  
Phosphate Glasses ◽  
Proton Mobility ◽  
Glass Transition Temperatures ◽  
Proton Conducting ◽  
Proton Transport Properties

Proton mobility at the glass transition temperature of 32 proton-conducting phosphate glasses converges between 2 × 10−9 and 2 × 10−7 cm2 V−1 s−1.

Effect of chain length on storage stability and hydrolytic reversion of sodium polyphosphate glasses

1969 ◽  
Vol 47 (16) ◽  
pp. 3081-3084 ◽  
Author(s):  
Robert J. Fuchs ◽  
Charles W. Lutz
Keyword(s):  
Chain Length ◽  
Storage Stability ◽  
Hard Water ◽  
Storage Conditions ◽  
Phosphate Glasses ◽  
Average Chain Length ◽  
Sodium Polyphosphate ◽  
Low Concentrations ◽  
Polyphosphate Glasses ◽  
Water Metal

At low concentrations in hard water, the polyphosphates revert to orthophosphate at rates which are not predictable from data obtained at higher concentrations. A reversal in the effect of pH on reversion rate at lower concentrations appears to be due to complex formation between the polyphosphate and the hard water metal ions. A minimum in the rate of reversion of polyphosphate glasses to orthophosphate occurs at an average chain length between about 13 and 40 under the low concentration hard water conditions. Phosphate glasses having an average chain length below 30 show good storage stability but longer-chain glasses undergo a decrease in chain length under normal "dry" storage conditions, with the rate of degradation increasing with increasing chain length.

scholarly journals Understanding the effect of oxide components on proton mobility in phosphate glasses using a statical analysis approach

RSC Advances ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 3012-3019
Author(s):  
Takahisa Omata ◽  
Issei Suzuki ◽  
Aman Sharma ◽  
Tomohiro Ishiyama ◽  
Junji Nishii ◽  
...  
Keyword(s):  
Phosphate Glass ◽  
Phosphate Glasses ◽  
Analysis Approach ◽  
Proton Mobility ◽  
Proton Conducting

Relationship between composition and proton mobility in proton conducting phosphate glass has been obtained using a statical analysis approach.

scholarly journals Improving thermal stability and its effects on proton mobility in proton-conducting phosphate glasses prepared by the electrochemical substitution of sodium ions with protons

2015 ◽  
Vol 275 ◽  
pp. 62-65 ◽  
Author(s):  
Takuya Yamaguchi ◽  
Tomohiro Ishiyama ◽  
Kanji Sakuragi ◽  
Junji Nishii ◽  
Toshiharu Yamashita ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Phosphate Glasses ◽  
Sodium Ions ◽  
Proton Mobility ◽  
Proton Conducting

Satiation in humans is modulated by fatty acid chain length

2001 ◽  
Vol 120 (5) ◽  
pp. A710-A710
Author(s):  
S LAL ◽  
J MCLAUGHLIN ◽  
O NIAZ ◽  
G DOCKRAY ◽  
A VARRO ◽  
...  
Keyword(s):  
Fatty Acid ◽  
Chain Length ◽  
Fatty Acid Chain Length ◽  
Fatty Acid Chain

Structure and dynamics of phosphate glasses

1998 ◽  
Vol 77 (2) ◽  
pp. 357-362 ◽  
Author(s):  
A. Matic, L. Borjesson
Keyword(s):  
Phosphate Glasses ◽  
Structure And Dynamics
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