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List of Chemical Substances
Published in T.S.S. Dikshith, and Safety, 2016
Barium hydroxide is available as colorless or white crystals. It is odorless and soluble in water. It is stable under ordinary conditions of use and storage. It is incompatible with acids, oxidizers, and chlorinated rubber. Barium hydroxide is corrosive to metals such as zinc. It is very alkaline and rapidly absorbs carbon dioxide from air and becomes completely insoluble in water. Barium hydroxide is used in analytical chemistry for the titration of weak acids and is used in organic synthesis as a strong base. Barium hydroxide decomposes to barium oxide when heated to 800°C.
Characterization and analysis of sediments in stormwater drainage for reuse
Published in Journal of Applied Water Engineering and Research, 2021
Carlos Peña-Guzmán, Jeimmy Cárdenas, Amelia Pérez, Andrés Torres, Karen Mora-Cabrera
The PCA allowed us to eliminate variables that did not contribute to the statistical model: depth, volatile solids, humidity, percent sand, percent clay, shear stress, length of pipe, diameter of pipe, differences in levels and slopes, along with the following compounds: chromium oxide (CrO), strontium oxide (SrO), manganese dioxide (MnO2), vanadium oxide (V2O5), nickel oxide (Ni2O3), lead oxide (Pb3O4), actinium oxide (Ac2O3), gold oxide (Au2O3), germanium monoxide (GeO), rubidium oxide (Rb2O), yttrium oxide (Y2O3), samarium oxide (Sm2O3), zirconium dioxide (ZrO2), caesium oxide (Cs2O), polonium dioxide (PoO2), europium oxide (Eu2O3), barium oxide (BaO), tantalum pentoxide (Ta2O5), and lutetium oxide (Lu2O3) because their percentage in the sediments was less than 0.01%. Finally, the statistical analyses were conducted using 17 variables (3 qualitative and 13 quantitative).
Structural, dielectric and ferroelectric properties of Ba(1-x)PbxTi(1-x)ZrxO3 ceramics
Published in Phase Transitions, 2023
Sunil Kumar, Anupinder Singh, Parveen Kumar
Ceramics with compositional formula Ba(1-x)PbxTi(1-x)ZrxO3 (x = 0, 0.05, 0.075, 0.10, 0.15, 0.20) were prepared by the conventional solid-state reaction route. AR grade (99.9% purity) Barium Oxide (BaCO3), Titanium dioxide (TiO2), Zirconium Oxide (ZrO2) and Lead Oxide (PbO) chemicals were used as raw materials. The powders were mixed and ball milled for 12 h using acetone and hard zirconia balls as milling. The slurry was then dried in an oven and calcined at 900°C for 4 h. After the calcination the samples were again ball milled for 12 h. The slurry was dried in the oven. A dilute solution of polyvinyl alcohol (PVA) was used as a binder to make the green samples in the shape of cylindrical pellets of diameter of ∼10 mm and thickness of ∼1 mm by applying a pressure of 10 tons using a uniaxial hydraulic press. The samples were sintered at 1300°C for 4 h with a heating rate of 5°C/min in closed alumina crucibles with the lead-rich environment [13]. The sintered samples were subjected to X-ray diffraction (XRD) to confirm the phase formation by using a Bruker, D-8 Advance X-ray diffractometer. The SEM images of the sintered samples were recorded by scanning electron microscope ‘Carl Zeiss Supra 55’. The pellets were then polished and cleaned by using acetone in an ultrasonicator. The silver epoxy was used to make Ohmic contacts to measure the electrical properties. The relative permittivity and tangent loss were measured as a function of temperature from 30 to 200°C at 1, 10, 100 and 1000 kHz frequency using a computer-controlled Wyne Kerr LCR meter, Model No.: 4100. The PE loops were recorded (at 30°C, 50 Hz) for all the samples using an automated P-E loop tracer.