Magnetic float densimeter for wide range density measurements

1977 ◽  
Vol 48 (12) ◽  
pp. 1695-1698 ◽  
Author(s):  
Bhajendra Narayan Barman ◽  
Zillur Rahim
Keyword(s):  
Density Measurements ◽  
Wide Range ◽  
Magnetic Float Densimeter ◽  
Range Density ◽  
Magnetic Float

Characterization of the Aurivillius Type PbBi4Ti4O15 Piezoelectric Ceramic Doped with Eu3+

2006 ◽  
Vol 45 ◽  
pp. 2483-2488
Author(s):  
L. Pablos ◽  
Maria Elena Villafuerte-Castrejón ◽  
A. Ibarra-Palos ◽  
J. Ocotlán-Flores ◽  
R. Sato ◽  
...  
Keyword(s):  
Piezoelectric Ceramic ◽  
Solubility Limit ◽  
Lattice Parameter ◽  
Layered Oxides ◽  
X Ray Diffraction ◽  
Scanning Calorimetry ◽  
Density Measurements ◽  
X Ray ◽  
Wide Range

PbBi4Ti4O15 belongs to the bismuth oxide layers family discovered by Aurivillius more than 50 years ago. In the last few years, there has been considerable interest in layered oxides exhibiting ferroelectric, piezoelectric and other related properties due to their wide range of application in technical devices. In the present work the PbBi4Ti4O15 solid solution formed with Eu3+ was synthesized by coprecipitation method and solubility limit was found. All compounds were characterized by scanning electron microscopy, density measurements and X-ray diffraction. The variation of lattice parameter with the Eu3+ concentration was obtained. Raman spectroscopy was carried out in order to determine the Eu3+ site in the lattice. Thermal analysis (thermogravimetry and differencial scanning calorimetry) results are also presented.

An Improved Magnetic Float Densimeter

2004 ◽  
Vol 32 (1) ◽  
pp. 13-20 ◽  
Author(s):  
Luis H. Blanco ◽  
Edgar F. Vargas
Keyword(s):  
Magnetic Float Densimeter ◽  
Magnetic Float

scholarly journals Intercomparison of snow density measurements: bias, precision and spatial resolution

2015 ◽  
Vol 9 (4) ◽  
pp. 3581-3616 ◽  
Author(s):  
M. Proksch ◽  
N. Rutter ◽  
C. Fierz ◽  
M. Schneebeli
Keyword(s):  
Initial Conditions ◽  
Fundamental Property ◽  
Density Variation ◽  
Measurement Methods ◽  
Micro Computed Tomography ◽  
Snow Density ◽  
Density Measurements ◽  
Wide Range ◽  
The Mean ◽  
Ct Density

Abstract. Density is a fundamental property of porous media such as snow. A wide range of snow properties and physical processes are linked to density, but few studies have addressed the uncertainty in snow density measurements. No study has yet considered the recent advances in snow measurement methods such as micro-computed tomography (CT). During the MicroSnow Davos 2014 workshop different approaches to measure snow density were applied in a controlled laboratory environment and in the field. Overall, the agreement between CT and gravimetric methods (density cutters) was 5 to 9 %, with a bias of −5 to 2 %, expressed as percentage of the mean CT density. In the field, the density cutters tend to overestimate (1 to 6 %) densities below and underestimate (1 to 6 %) densities above 296 to 350 kg m−3, respectively, depending on the cutter type. Using the mean per layer of all measurement methods applied in the field (CT, box, wedge and cylinder cutter) and ignoring ice layers, the variation of layer density between the methods was 2 to 5 % with a bias of −1 to 1 %. In general, our result suggests that snow densities measured by different methods agree within 9 %. However, the density profiles resolved by the measurement methods differed considerably. In particular, the millimeter scale density variations revealed by the high resolution CT contrasted the thick layers with sharp boundaries introduced by the observer. In this respect, the unresolved variation, i.e. the density variation within a layer, which is lost by sampling with lower resolution or layer aggregation, is critical when snow density measurements are used as boundary or initial conditions in numerical simulations.

CO2 Reduction to Renewable Hydrocarbon Fuel—Mimicking Natural Photosynthesis

MRS Advances ◽  
2017 ◽  
Vol 2 (55) ◽  
pp. 3383-3388
Author(s):  
S. Alfalah ◽  
W.M.I. Hassan ◽  
A. Verma ◽  
N. Al.-Hashimi ◽  
M. M. Khader ◽  
...  
Keyword(s):  
Density Functional Theory ◽  
Light Absorption ◽  
Density Functional ◽  
Co2 Reduction ◽  
Visible Spectrum ◽  
Hydrocarbon Fuel ◽  
Functional Theory ◽  
Wide Range ◽  
Natural Photosynthesis ◽  
Range Density

AbstractWe report on a wide-range Density Functional Theory (DFT) investigation of the g-C3N4 photocatalysis systems combined with metals/nonmetals, especially those available in plants and involved in the natural photosynthesis process, such as K, Mg, Mn, Mo, Fe, Co, Cr, S and B. It is found that doping increases the range at which light absorption occurs to significantly large regions of the visible spectrum. These findings suggested that the g-C3N4 can be a promising system for the photosynthesis process.

A high-precision, variable-pressure magnetic float densimeter

1972 ◽  
Vol 1 (2) ◽  
pp. 173-186 ◽  
Author(s):  
Frank J. Millero ◽  
Jonathan H. Knox ◽  
Robert T. Emmet
Keyword(s):  
High Precision ◽  
Variable Pressure ◽  
Magnetic Float Densimeter ◽  
Magnetic Float
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