scholarly journals Amorphous Phosphate Crystals Measurement

2020 ◽  
Author(s):  
Keyword(s):  
Amorphous Phosphate

Fast Proton Conductors from Inorganic-Organic Composites: I. Amorphous Phosphate-Nafion and Silicophosphate-PMA/PWA Hybrids

1999 ◽  
Vol 600 ◽  
Author(s):  
Yong-Il Park ◽  
Jae-Dong Kim ◽  
Masayuki Nagai
Keyword(s):  
Phosphoric Acid ◽  
Proton Conductivity ◽  
Proton Conductors ◽  
Phosphorus Concentration ◽  
High Proton ◽  
Proton Source ◽  
Drastic Increase ◽  
Amorphous Phosphate ◽  
Exchange Resins ◽  
Very High

AbstractA drastic increase of electrical conductivity was observed in the composite of amorphous phosphate and ion-exchange resins (Nafion) as phosphorus concentration increased. Incorporation of amorphous phosphate into Nafion caused a large increase of conductivity to about 4×10−1S/cm at 23°C. However, the fabricated composite showed very low chemical stability.A high proton conductivity was also observed in a new inorganic-organic hybrids through incorporating PMA(molibdo-phosphoric acid)/PWA(tungsto-phosphoric acid) as a proton source in amorphous silicophosphate gel structure. Obtained gels were homogeneous and chemically stable. Resulting proton conductivity is very high (up to 5.5×10−3S/cm) compared to those of silicophosphate gels.

scholarly journals Chemical Nature of Remineralized Flattened Enamel Surfaces

1971 ◽  
Vol 50 (6) ◽  
pp. 1621-1625 ◽  
Author(s):  
David J. Krutchkoff ◽  
Nathaniel H. Rowe
Keyword(s):  
Calcium Phosphate ◽  
Calcium Fluoride ◽  
Chemical Nature ◽  
Internal Reflection ◽  
Enamel Surface ◽  
Reflection Spectroscopy ◽  
Chemical Changes ◽  
Amorphous Phosphate ◽  
Internal Reflection Spectroscopy

lnfrared internal reflection spectroscopy (IRS) was used to investigate chemical changes of enamel surface during in vitro remineralization. Specimens were demineralized and exposed either to calcium phosphate-fluoride solutions or to acidulated fluorophosphate. The former showed amorphous phosphate remineralization, and the latter showed surface precipitate interpreted to be calcium fluoride. The significance of previous demineralization time to both forms of remineralization is discussed.

Peculiarities of deposition of amorphous phosphate coatings on MA-2 magnesium alloys

2008 ◽  
Vol 44 (6) ◽  
pp. 599-602
Author(s):  
V. Burokas ◽  
A. Martushene ◽  
A. Ruchinskene ◽  
G. Bikul’chus ◽  
R. Ramanauskas
Keyword(s):  
Magnesium Alloys ◽  
Phosphate Coatings ◽  
Amorphous Phosphate

Characterisation of amorphous phosphate coatings onto carbon steel surfaces

2012 ◽  
Vol 90 (6) ◽  
pp. 330-333 ◽  
Author(s):  
L Fachikov ◽  
Y Tumbaleva ◽  
D Ivanova ◽  
B Tzaneva
Keyword(s):  
Carbon Steel ◽  
Phosphate Coatings ◽  
Steel Surfaces ◽  
Amorphous Phosphate

Deposition of amorphous phosphate coatings on aluminum

2006 ◽  
Vol 42 (4) ◽  
pp. 339-344
Author(s):  
V. Burokas ◽  
A. Martushene ◽  
A. Ruchinskene ◽  
A. Sudavichyus ◽  
G. Bikul’chyus
Keyword(s):  
Phosphate Coatings ◽  
Amorphous Phosphate

Fast Proton Conductors from Inorganic-Organic Composites: II. Amorphous Phosphate-PTFE and ZrP-PTFE Composites

1999 ◽  
Vol 600 ◽  
Author(s):  
Yong-Il Park ◽  
Jae-Dong Kim ◽  
Masayuki Nagai
Keyword(s):  
Heat Treatment ◽  
Proton Conductivity ◽  
Zirconium Phosphate ◽  
Treatment Temperature ◽  
Proton Conductors ◽  
Fast Proton ◽  
High Proton Conductivity ◽  
High Proton ◽  
Amorphous Phosphate ◽  
Ptfe Composites

AbstractA high proton-conductivity was observed in the composite of amorphous phosphate and polytetafluoroethylene (PTFE). Incorporation of amorphous phosphate into PTFE emulsion caused a large increase of conductivity to about 4×10−2S/cm at 23°C. However, the conductivity decreased with increasing heat-treatment temperature, and the fabricated composite showed very low chemical stability.As a chemically stable composite, PTFE-based composite was also synthesized from α- or γ-zirconium phosphate crystalline powders dispersed in partially polymerized PTFE particles. By addition of zirconium phosphate powders, the proton conductivity jumped up to 2.2×10−3S/cm from 10−13S/cm of PTFE.

Enhancing electrocatalytic hydrogen evolution of WTe2 by formation of amorphous phosphate nanoshells

2021 ◽  
pp. 138409
Author(s):  
Dexin Xia ◽  
Zhe Wang ◽  
Shitu Yang ◽  
Zengjian Cai ◽  
Mingzhen Hu ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Amorphous Phosphate

scholarly journals Dehydration by air-amorphous phosphate of calcium-magnesium

2014 ◽  
pp. 60
Author(s):  
V. Sinyev ◽  
L. Levchenko ◽  
G. Toxseitova ◽  
E. Sakhipov ◽  
А. Batyrbayeva ◽  
...  
Keyword(s):  
Calcium Magnesium ◽  
Amorphous Phosphate

Santabarbaraite: a new amorphous phosphate mineral

2003 ◽  
Vol 15 (1) ◽  
pp. 185-192 ◽  
Author(s):  
Giovanni Pratesi ◽  
Curzio Cipriani ◽  
Gabriele Giuli ◽  
William D. Birch
Keyword(s):  
Phosphate Mineral ◽  
Amorphous Phosphate
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