Physical and optical properties of sodium borate glasses doped with Dy3+ ions

2017 ◽  
Vol 31 (23) ◽  
pp. 1750171 ◽  
Author(s):  
Y. S. M. Alajerami ◽  
K. M. Abushab ◽  
S. I. Alagha ◽  
M. H. A. Mhareb ◽  
A. Saidu ◽  
...  
Keyword(s):  
Physical Properties ◽  
Oscillator Strengths ◽  
Sodium Borate ◽  
Blue Color ◽  
X Ray Diffraction ◽  
Absorption Bands ◽  
Hypersensitive Transition ◽  
X Ray ◽  
Yellow Color ◽  
Polaron Radius

The photoluminescence, optical and physical properties of sodium borate (NB) doped with different concentrations of Dy[Formula: see text] were determined and well discussed. The samples were prepared by the melt-quenching technique and characterized by X-ray diffraction (XRD) and Fourier transform infrared (FTIR) spectroscopy. Photoluminescence and absorption spectra of NB glasses doped with different concentrations of Dy[Formula: see text] are reported. Ten absorption bands with hypersensitive transition at 1272 nm ([Formula: see text] [Formula: see text][Formula: see text]) and two emission bands for the transitions at [Formula: see text] [Formula: see text][Formula: see text] (blue color) and [Formula: see text] [Formula: see text][Formula: see text] (yellow color) with an excitation of 330 nm have been recorded. A series of considerable physical properties (oscillator strengths, refractive index, ions concentration, polaron radius) was calculated for each dopant concentration.

The Experimental of Low Temperature Color Slip for Decorative on Earthenware Body

2016 ◽  
Vol 690 ◽  
pp. 282-285
Author(s):  
Soravich Mulinta
Keyword(s):  
Low Temperature ◽  
Physical Properties ◽  
Manganese Oxide ◽  
Ferric Oxide ◽  
Potassium Feldspar ◽  
Raw Material ◽  
Blue Color ◽  
X Ray ◽  
Yellow Color

The purpose of the study was to investigate the effects of dolomite body, frit and potassium feldspar on the properties of color slip for decorative method of color slip on earthen ware production. The characterization of raw material was analyzed by X-ray fluorescence (XRF). The experiment started with triaxial blend of dolomite body, frit and potassium feldspar in the defined ratio and then to painting of color slips on earthenware production. After that, firing specimens at 950 °C in oxidation atmosphere. Finally, the specimens were tested microstructure and physical properties. The results showed that the ratio of 50% dolomite body, 40% frit and 10% potassium feldspar were optimum properties for decorative on earthenware body. In color slip consisting of blue color added Cobalt oxide 1% ,Green colors added chromic oxide 10% , Gray color added manganese oxide 10% ,yellow color added stain 2225 10% and hazel color added ferric oxide 2 wt %.

Reactivity of Cu(I) Compounds towards Ethylenediamine and Dimethylformamide: Crystal Structure of CuCl(PiPr3)n (n=1, 2), CuX(PPh3)(en)2 (X=Cl, Br) and CuX(PPh3)(dmf)

2012 ◽  
Vol 67 (6) ◽  
pp. 564-572 ◽  
Author(s):  
Sandra Scharfe ◽  
Thomas F. Fässler
Keyword(s):  
Room Temperature ◽  
Crystalline Form ◽  
Blue Color ◽  
X Ray Diffraction ◽  
Copper Halide ◽  
X Ray ◽  
Greenish Yellow ◽  
Yellow Color ◽  
Halide Complexes ◽  
Hexane Solution

The synthesis of several phosphine Cu(I) complexes is reported, and their reactivity towards the solvents ethylenediamine (en) and dimethylformamide (dmf) has been investigated. CuX(PPh3) [X = Cl (1), Br (2)], CuCl(PCy3) (3) and CuCl(PiPr3)n [n = 1 (4), 2 (5)] were prepared according to adapted literature procedures. The complexes CuCl(PiPr3)n were obtained in crystalline form from a hexane solution at -70 °C and structurally characterized for n = 1 and 2. Copper halide complexes of PCy3 (3) and PiPr3 [n=1 (4)] gave colorless solutions in both en and dmf indicating the absence of Cu(II) ions. CuCl(PiPr3)2 is stable in dmf solutions. By contrast, the complexes CuX(PPh3) (X = Cl, Br) dissolve with blue color in en and with greenish-yellow color in dmf at higher temperatures under inert gas indicating a redox process affording Cu(II). At room temperature colorless crystals of CuX(PPh3)(en)2 [X = Cl (6), Br (7)] and CuX(PPh3)(dmf) [X = Cl (8), Br (9)] were isolated from the solutions and analyzed by single-crystal X-ray diffraction.

Structural and optical properties of lithium sodium borate glasses doped with Sm3+ ions

2014 ◽  
Vol 28 (26) ◽  
pp. 1450182 ◽  
Author(s):  
R. S. E. S. Dawaud ◽  
S. Hashim ◽  
Y. S. M. Alajerami ◽  
M. H. A. Mhareb ◽  
M. M. Maqableh ◽  
...  
Keyword(s):  
Fourier Transforms ◽  
Emission Spectra ◽  
Oscillator Strengths ◽  
Sodium Borate ◽  
Absorption Bands ◽  
Hypersensitive Transition ◽  
Melting Temperatures ◽  
Xrd Diffraction ◽  
Red Color ◽  
Orange Color

Absorption and emission spectra of Sm 3+ doped lithium sodium borate (LNB) have been reported. The samples were prepared by the melt-quenching technique and characterized by X-ray diffraction (XRD), diffraction thermal analysis (DTA), Fourier transforms infrared (FTIR) spectroscopy and field emission scanning electron microscopy (FESEM). From the thermo-grams spectrum, glass transition (Tg), crystallization (Tc) and melting temperatures (Tm) have been evaluated. Direct and indirect optical band gaps have been calculated based on the glasses UV absorption spectra. These glasses have shown strong nine absorption bands with hypersensitive transition at 1221 nm (6 H 5/2→4 H 3/2) and five emission bands for the transition at 4 I 7/2→6 H 13/2 (green color), 4 I 7/2→6 H 7/2 (orange color), 4 I 7/2→6 H 9/2 (orange color), 4 I 7/2→6 H 11/2 (red color) and 4 I 7/2→6 H 13/2 (red color) with performing an excitation of 400 nm. The oscillator strengths, refractive index, ions concentration, polaron radius and other parameters have been calculated for each dopant.

Microstructure and Physical Properties of Clay-Polymer Composites

2000 ◽  
Vol 628 ◽  
Author(s):  
T.N. Blanton ◽  
D. Majumdar ◽  
S.M. Melpolder
Keyword(s):  
Composite Materials ◽  
Physical Properties ◽  
Polymer Composites ◽  
Basal Plane ◽  
X Ray Diffraction ◽  
X Ray ◽  
Layered Clay

ABSTRACTClay-polymer nanoparticulate composite materials are evaluated by the X-ray diffraction technique. The basal plane spacing provided information about the degree of intercalation and exfoliation of the 2: 1 layered clay structure. Both intercalation and exfoliation are controlled by the identity of the polymer and the clay:polymer ratio.

Leaching Studies of Cement-Glass Package Containing Sodium Borate

1986 ◽  
Vol 84 ◽  
Author(s):  
Masahiro Okamoto ◽  
Koichi Chino ◽  
Tsutomu Baba ◽  
Tatsuo Izumida ◽  
Fumio Kawamura ◽  
...  
Keyword(s):  
Sodium Silicate ◽  
Liquid Waste ◽  
Sodium Borate ◽  
Pressurized Water Reactor ◽  
X Ray Diffraction ◽  
Adsorption Ability ◽  
Pressurized Water ◽  
X Ray ◽  
Solidification Reaction ◽  
Main Components

AbstractA new solidification technique using cement-glass, which is a mixture of sodium silicate, cement, additives, and initiator of the solidification reaction, was developed for sodium borate liquid waste generated from pressurized water reactor (PWR) plants. The cement-glass could solidify eight times as much sodium borate as cement could, because the solidifying reaction of the cement-glass is not hindered by borate ions.The reaction mechanism of sodium silicate and phosphoric silicate (initiator), the main components of cement-glass, was studied through X-ray diffraction and compressive strength measurements. It was found that three- dimensionally bonded silicon dioxide was produced by polymerization of the two silicates. The leaching ratio of cesium from the cement-glass package was one-tenth that of the cement one. This low value was attributed to a high cesium adsorption ability of the cement-glass and it could be theoretically predicted accordingly.

scholarly journals Thermal, Structural, and Physical Properties of Freeze Dried Tropical Fruit Powder

2014 ◽  
Vol 2014 ◽  
pp. 1-10 ◽  
Author(s):  
K. A. Athmaselvi ◽  
C. Kumar ◽  
M. Balasubramanian ◽  
Ishita Roy
Keyword(s):  
Particle Size ◽  
Physical Properties ◽  
Average Particle Size ◽  
Average Particle ◽  
X Ray Diffraction ◽  
Tropical Fruit ◽  
X Ray ◽  
Freeze Dried ◽  
Fruit Powder ◽  
Lcr Meter

This study evaluates the physical properties of freeze dried tropical (guava, sapota, and papaya) fruit powders. Thermal stability and weight loss were evaluated using TGA-DSC and IR, which showed pectin as the main solid constituent. LCR meter measured electrical conductivity, dielectric constant, and dielectric loss factor. Functional groups assessed by FTIR showed presence of chlorides, and O–H and N–H bonds in guava, chloride and C–H bond in papaya, and chlorides, and C=O and C–H bonds in sapota. Particle size and type of starch were evaluated by X-ray diffraction and microstructure through scanning electronic microscopy. A semicrystalline profile and average particle size of the fruit powders were evidenced by X-ray diffraction and lamellar/spherical morphologies by SEM. Presence of A-type starch was observed in all three fruits. Dependence of electric and dielectric properties on frequency and temperature was observed.

Lithofacies Analysis and Qualitative Minerology of the Sediments of #3 Well in the Greater Ughelli Depobelt, Niger Delta Basin

2021 ◽  
Vol 13 (2) ◽  
pp. 601-610
Author(s):  
K. Itiowe ◽  
R. Oghonyon ◽  
B. K. Kurah
Keyword(s):  
Physical Properties ◽  
Clay Minerals ◽  
Niger Delta ◽  
Reservoir Quality ◽  
X Ray Diffraction ◽  
X Ray ◽  
Sandy Shale ◽  
Heterogeneous Nature ◽  
Niger Delta Basin ◽  
Shaly Sandstone

The sediment of #3 Well of the Greater Ughelli Depobelt are represented by sand and shale intercalation. In this study, lithofacies analysis and X-ray diffraction technique were used to characterize the sediments from the well. The lithofacies analysis was based on the physical properties of the sediments encountered from the ditch cuttings.  Five lithofacies types of mainly sandstone, clayey sandstone, shaly sandstone, sandy shale and shale and 53 lithofacies zones were identified from 15 ft to 11295 ft. The result of the X-ray diffraction analysis identified that the following clay minerals – kaolinite, illite/muscovite, sepiolite, chlorite, calcite, dolomite; with kaolinite in greater percentage. The non-clay minerals include quartz, pyrite, anatase, gypsum, plagioclase, microcline, jarosite, barite and fluorite; with quartz having the highest percentage. Therefore, due to the high percentage of kaolinite in #3 well, the pore filing kaolinite may have more effect on the reservoir quality than illite/muscovite, chlorite and sepiolite. By considering the physical properties, homogenous and heterogeneous nature of the #3 Well, it would be concluded that #3 Well has some prospect for petroleum and gas exploration.

Synthesis of Galactomannan Sulfate-Citrate

2022 ◽  
Vol 1049 ◽  
pp. 218-223
Author(s):  
Aleksandr S. Kazachenko ◽  
Yuriy N. Malyar ◽  
Anna S. Kazachenko
Keyword(s):  
Biological Activity ◽  
Ftir Spectroscopy ◽  
X Ray Diffraction ◽  
Absorption Bands ◽  
X Ray ◽  
Mixed Ester ◽  
First Time ◽  
Derivatives Of

Sulfated derivatives of polysaccharides have anticoagulant, hypolipedimic and other biological activity. In this work, a complex mixed ester of galactomannan, its sulfate-citrate, was obtained for the first time. The introduction of citrate and sulfate groups was proved by FTIR spectroscopy by the appearance of corresponding absorption bands. It was shown by X-ray diffraction that the introduction of the citrate group leads to the amorphization of the galactomannan structure.

scholarly journals Solvent Concentration Effect on Powder X-Ray Diffraction and Dissolution Profiles of Acyclovir-Nicotinamide Cocrystals

2017 ◽  
Vol 7 (04) ◽  
Author(s):  
Setyawan D. ◽  
Siswandono Siswandono ◽  
Winantari A. N. ◽  
Zu’aimah K.
Keyword(s):  
Physical Properties ◽  
Oral Bioavailability ◽  
Ethanol Concentration ◽  
Antiviral Agent ◽  
X Ray Diffraction ◽  
Solvent Concentration ◽  
Solubility In Water ◽  
X Ray ◽  
Dissolution Properties ◽  
Slurry Method

Objective : Acyclovir (ACV) is well-known antiviral agent that has absorption problem, mainly due to its poor solubility in water and oral bioavailability. To improve acyclovir physical properties, especially dissolution properties, acyclovirnicotinamide(NCT) cocrystal was formed. Methods : ACV-NCT cocrystal was prepared using slurry method using ethanol as solvent with different concentration. The ACV-NCT cocrystal from each sample groups was characterized using powder X-ray diffraction (PXRD), and then dissolution properties evaluated. Results : Each ACV-NCT cocrystals prepared from slurry method with different ethanol concentrations have different PXRD profile. Dissolution analysis (ED15) showed that ACV-NCT cocrystallization using slurry methods with 10,0 ml/g as ethanol concentration significantly increase ED15 values compared to acyclovir and acyclovir-nicotinamide physical mixture (α=0,05). Conclusion : ACV-NCT cocrystal successfully formed using slurry method with 10,0 ml/g as optimal ethanol concentration.

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