Dosimetric properties of germanium doped calcium borate glass subjected to 6 MV and 10 MV X-ray irradiations

2014 ◽  
Vol 336 ◽  
pp. 70-73 ◽  
Author(s):  
T.N.H. Tengku Kamarul Bahri ◽  
H. Wagiran ◽  
R. Hussin ◽  
M.A. Saeed ◽  
I. Hossain ◽  
...  
Keyword(s):  
Borate Glass ◽  
Calcium Borate ◽  
X Ray

Adsorption of Fluoride Ions from Drinking Water Using Glass Derived Porous Hydroxyapatite Scaffolds

2013 ◽  
Vol 423-426 ◽  
pp. 1413-1417
Author(s):  
Dong Lin Gu ◽  
Wen Liang
Keyword(s):  
Borate Glass ◽  
Energy Dispersive Spectrometer ◽  
X Ray Diffraction ◽  
Polymer Foam ◽  
Fluoride Ions ◽  
Porous Hydroxyapatite ◽  
X Ray ◽  
Adsorption Performance ◽  
Sodium Calcium ◽  
Fluorine Ions

Sodium calcium borate glass derived hydroxyapatite (G-HAP) scaffolds were prepared by dipping with polymer foam. The effects of adsorption time and G-HAP scaffolds dosage on adsorption performance were studied. The results showed that G-HAP scaffolds could remove fluorine ions in solution effectively. The mechanism of G-HAP scaffolds in removing fluorine ions from aqueous solutions was investigated by the X-ray diffraction, Infrared Spectra and Scanning electron microscopy-Energy Dispersive Spectrometer.

M�ssbauer and X-ray photoelectron spectroscopic studies of heat-treated calcium borate glasses containing iron

1974 ◽  
Vol 9 (7) ◽  
pp. 1115-1122 ◽  
Author(s):  
M. J. Tricker ◽  
J. M. Thomas ◽  
M. H. Omar ◽  
A. Osman ◽  
A. Bishay
Keyword(s):  
Spectroscopic Studies ◽  
Borate Glasses ◽  
Calcium Borate ◽  
X Ray ◽  
Heat Treated

Preparation, Characterization and Tribological Evaluation of Calcium Borate Nanoparticles as Lubricant Additives

2010 ◽  
Vol 148-149 ◽  
pp. 1047-1056 ◽  
Author(s):  
Jiu Sheng Li ◽  
Li Feng Hao ◽  
Xiao Hong Xu ◽  
Li Zhang ◽  
Tian Hui Ren
Keyword(s):  
Oleic Acid ◽  
Electron Microscope ◽  
Photoelectron Spectroscopy ◽  
Lubricant Additive ◽  
Calcium Borate ◽  
Action Mechanism ◽  
Friction Process ◽  
X Ray ◽  
Transmission Electron ◽  
Worn Surface

To develop a potential substitute for conventional lubricant additive, pure calcium borate nanoparticles (PCBN) and calcium borate nanoparticles modified with oleic acid (MCBN) were prepared. The microstructures of the as-obtained samples were characterized using X-ray power diffraction (XRD), transmission electron microscope (TEM) and infrared spectra (IR), and the dispersing stability of oil containing nanoparticles was also evaluated. Tribological properties of MCBN used as lubricating additive were evaluated using four-ball tribometer and compared with that of PCBN. The results indicate that MCBN show better antiwear and friction-reducing property than PCBN. The worn surface of the steel ball lubricated with MCBN was investigated by Polarized microscope (PM) and X-ray photoelectron spectroscopy (XPS), and the action mechanism of MCBN during friction process was preliminarily discussed.

Physical and Structural Properties of Dysprosium Doped Barium Borate Glass

2019 ◽  
Vol 290 ◽  
pp. 46-52 ◽  
Author(s):  
Norihan Yahya ◽  
Mardhiah Abdullah ◽  
Mohamed Najmi Naquib Mohamed Zainal Abidin ◽  
Azman Kasim ◽  
Azhan Hashim
Keyword(s):  
Molar Volume ◽  
Structural Properties ◽  
Borate Glass ◽  
Glass Network ◽  
Barium Borate ◽  
X Ray Diffraction ◽  
Melt Quenching ◽  
X Ray ◽  
Amorphous Nature ◽  
Barium Borate Glass

Five distinguish glass samples were prepared by melt quenching technique of the composition (81-x)H3BO3-19BaCO3-xDy2O3 with x = 0, 0.2, 0.4, 0.6 and 0.8 mol%. The effect of Dy3+ to the barium borate glass can be investigated in terms of their physical properties such as density, molar volume and oxygen packing density. The structural properties were analyzed by X-Ray Diffraction (XRD) technique and Fourier Transform Infrared Spectroscopy (FTIR). The result revealed that the increment of mol% of Dy3+ in the compound generally will increases the density and molar volume of the glass samples. The amorphous nature of the glass system was verified from the XRD spectra pattern. Meanwhile, the FTIR spectra shown the presence of Ba2+, BO3, BO4, B-O-B linkage, H-O-H and isolated borate in the glass network.

EXAFS study of a “mixed-alkali” type effect in sodium-calcium borate glass

1999 ◽  
Vol 150 (1-4) ◽  
pp. 403-407 ◽  
Author(s):  
H. C. Brook ◽  
A. V. Chadwick ◽  
J.F. W. Mosslemans ◽  
G. N. Greaves
Keyword(s):  
Borate Glass ◽  
Calcium Borate ◽  
Mixed Alkali ◽  
Sodium Calcium ◽  
Exafs Study

Optical properties of Er3+/Yb3+ co-doped bismuth calcium borate glass system for NIR lasers and fiber amplifiers

2018 ◽  
Vol 194 ◽  
pp. 440-445 ◽  
Author(s):  
Shangjiu Nian ◽  
Yin Zhang ◽  
Weijing Cao ◽  
Zhenning Wu ◽  
Jun Tang ◽  
...  
Keyword(s):  
Optical Properties ◽  
Borate Glass ◽  
Glass System ◽  
Fiber Amplifiers ◽  
Calcium Borate ◽  
Co Doped

Dehydration processes in borate minerals: pentahydroborite and nifontovite from Fuka Mine, Okayama Prefecture, Japan

2010 ◽  
Vol 74 (6) ◽  
pp. 1013-1025 ◽  
Author(s):  
V. Bermanec ◽  
N. Tomašić ◽  
Ž. Žigovečki Gobac ◽  
M. Rajić Linarić ◽  
K. Furić
Keyword(s):  
Thermal Analysis ◽  
Raman Spectroscopy ◽  
Differential Thermal Analysis ◽  
Calcium Borate ◽  
X Ray Diffraction ◽  
Critical Temperatures ◽  
X Ray ◽  
Borate Minerals ◽  
Dehydration Processes ◽  
Okayama Prefecture

AbstractData on the dehydration of pentahydroborite, CaB2O(OH)6·2H2O and nifontovite, Ca3B6O6(OH)12·2H2O from the Fuka mine, Japan are presented. Critical temperatures of the dehydration of the borates were determined by thermogravimetric analysis/differential thermal analysis measurements. The untreated mineral samples and their heating products were investigated by X-ray diffraction and Raman spectroscopy. Upon dehydration, both minerals decompose and undergo amorphization, and at greater temperatures crystallize as an orthorhombic calcium borate, CaB2O4 (Pnca). The dehydration paths of the two minerals are different, with nifontovite showing a greater resistance to decomposition and amorphization than pentahydroborite. Differences in the dehydration processes are related to the residuals of the water content and structural accommodation of the borate polyanion.

Reverse Micro-Emulsion Synthesis of Oxygen-Enriched Low-Friction Boron Nitride/Calcium Borate Microspheres

2018 ◽  
Vol 71 (12) ◽  
pp. 983
Author(s):  
Songdong Yuan ◽  
Canxing Yang ◽  
Xing Zhu ◽  
Guodong Jiang ◽  
Renzhong Huang ◽  
...  
Keyword(s):  
Boron Nitride ◽  
Photoelectron Spectroscopy ◽  
Sodium Borate ◽  
Phase Identification ◽  
Calcium Borate ◽  
Base Oil ◽  
X Ray ◽  
Transmission Electron ◽  
Micro Emulsion ◽  
Boron Source

Oxygen enriched boron nitride microspheres (BNOs) coated with nano-sized calcium borate (CB) were synthesised by a reverse micro-emulsion method, in which calcium chloride and sodium borate were selected as the calcium and boron source, respectively. The phase identification and chemical bonding of the composite were confirmed by X-ray driffraction (XRD) and FT-IR spectroscopy. The chemical composition and valence state were determined by X-ray photoelectron spectroscopy (XPS). The morphology and microstructure of the samples were characterised by transmission electron microscopy (TEM) along with surface area analysis. The tribological property of the microspheres as a wear resistance additive in base oil was evaluated by a four-ball tester. The results show that the strawberry-like BNO/CB nanocomposites were fabricated successfully and possess a relatively high friction-reducing and antiwear performance. After the addition of BNO/CB nanocomposites, the friction coefficients of the base oil decreased by 13.3% while the diameter of the grinding spot decreased by 16.4%.

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