Barium Carbonate, Mixt. With Strontium Carbonate And Calcium Carbonate (50%: 45%: 5%) 513-77-9

2012 ◽  
Keyword(s):  
Calcium Carbonate ◽  
Barium Carbonate ◽  
Strontium Carbonate

Controlling nucleation in giant liposomes

2014 ◽  
Vol 50 (42) ◽  
pp. 5619-5622 ◽  
Author(s):  
Chantel C. Tester ◽  
Michael L. Whittaker ◽  
Derk Joester
Keyword(s):  
Calcium Carbonate ◽  
Barium Carbonate ◽  
Strontium Carbonate ◽  
Confinement Effects ◽  
Amorphous Calcium Carbonate

Confinement effects in giant liposomes lead to dramatic stabilization of amorphous calcium carbonate (ACC), intermediate stabilization of amorphous strontium carbonate (ASC), but has no effect on the precipitation of barium carbonate.

STUDY OF THE INFLUENCE BETWEEN BARIUM IONS AND CALCIUM IONS ON MORPHOLOGY AND SIZE OF COPRECIPITATION IN MICROEMULSION

2015 ◽  
Vol 22 (03) ◽  
pp. 1550036 ◽  
Author(s):  
NONG WANG ◽  
QING LUO MENG
Keyword(s):  
Calcium Carbonate ◽  
Barium Carbonate ◽  
Spherical Particles ◽  
X Ray Diffraction ◽  
Barium Ions ◽  
Molar Ratios ◽  
Measurement Results ◽  
Inverse Microemulsion ◽  
Barium Ion ◽  
System Phase

In this paper, we systematically drew a series of inverse-microemulsion quasi-ternary system phase diagrams of OP -10+ C 8 H 17 OH + C 6 H 12+ brine  ( CaCl 2/ BaCl 2) by adjusting the ratio of CaCl 2 and BaCl 2. On this basis, microemulsions have been prepared with seven different molar ratios of Ca 2+/ Ba 2+, and calcium carbonate and barium carbonate coprecipitation products were obtained by reaction with an equimolar amount of sodium carbonate. The influence of barium ion to morphology and composition of nanometer calcium carbonate were studied. These samples were characterized by scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR) and X-ray diffraction (XRD). The SEM photographs indicated that when the content of Ca 2+ was higher, some incomplete large cube of coprecipitation particles were formed in solution, but with the content of Ba 2+ increased gradually, they formed a large number of small spherical particles, with the further increase of Ba 2+ concentration, the particles mainly had structures of irregular polyhedron eventually. The measurement results of FTIR and XRD indicated that CaCO 3 coprecipitation products gradually changed from calcite to the vaterite, eventually turned into being aragonite with the further increase of Ba 2+ concentration.

scholarly journals Co-precipitation of calcium carbonate and barium carbonate at high temperature.

1985 ◽  
Vol 1 (1) ◽  
pp. 37-39 ◽  
Author(s):  
Keiko YOKOFUJITA ◽  
Yuko ISHII ◽  
Kazuyoshi TAKIYAMA
Keyword(s):  
High Temperature ◽  
Calcium Carbonate ◽  
Barium Carbonate ◽  
Co Precipitation

Study on Desulfurization Characteristic of Desulphurizing Coal Water Slurry

2013 ◽  
Vol 807-809 ◽  
pp. 1459-1463
Author(s):  
Chang Xing Shi ◽  
Hai Xiang Tang
Keyword(s):  
Calcium Carbonate ◽  
Barium Carbonate ◽  
Pulverized Coal ◽  
Water Evaporation ◽  
Desulfurization Rate ◽  
Water Slurry ◽  
Coal Water Slurry ◽  
Desulfurization Efficiency ◽  
Reaction Atmosphere

With calcium carbonate and barium carbonate as desulfurizers, combustion desulphurization experiments of coal water slurry and pulverized coal were respectively done in the ZCL. The results show that desulfurization efficiency in coal water slurry is prior to the same pulverized coal. The desulfurization characteristic of desulphurizing coal water slurry was analyzed by comparing the desulfurization efficiency of coal water slurry and pulverized coal. The reaction atmosphere in the boiler is different from the pulverized coal because of water evaporation ,and the CO content was lower ,so the decomposing rate for desulphurization products was reduced,after water evaporated ,it formed microstructures which was considered as favorable to the desulfurization rate .

Synthesis and structural characterization of BaSr2Ge3O9

2016 ◽  
Vol 71 (12) ◽  
pp. 1225-1232
Author(s):  
Sebastian Bräuchle ◽  
Clivia Hejny ◽  
Hubert Huppertz
Keyword(s):  
High Temperature ◽  
Solid State ◽  
Structural Characterization ◽  
Diffraction Data ◽  
Barium Carbonate ◽  
Strontium Carbonate ◽  
X Ray Diffraction ◽  
Triclinic Space Group ◽  
X Ray

AbstractBaSr2Ge3O9 was prepared by high-temperature solid-state synthesis at 1100°C in a platinum crucible from barium carbonate, strontium carbonate, and germanium(IV) oxide. The compound crystallizes in the triclinic space group P1̅ (no. 2) isotypically to walstromite BaCa2Si3O9. The structure was refined from single-crystal X-ray diffraction data: a=7.104(5), b=10.060(7), c=7.099(5) Å, α=83.0(2), β=77.0(2), γ=70.2(2)°, V=464.3(6) Å3, R1=0.0230, and wR2=0.0602 for all data. BaSr2Ge3O9 is characterized by three-membered rings of germanate tetrahedra. There are three crystallographically different Ge sites (Ge1, Ge2, and Ge3) in each [Ge3O9]6− ring. The rings occur in layers with the apices of alternating rings pointing in opposite directions. The Sr2+ and Ba2+ ions are located in between. The Sr1 cation is eight-fold coordinated, while Sr2 is octahedrally surrounded by oxide anions, and the Ba cation again eight-fold coordinated.

An anthropomorphic maxillofacial phantom using 3-dimensional printing, polyurethane rubber and epoxy resin for dental imaging and dosimetry

2021 ◽  
pp. 20200323
Author(s):  
Sawyer Rhae Badiuk ◽  
David K Sasaki ◽  
Daniel W Rickey
Keyword(s):  
Calcium Carbonate ◽  
3D Printing ◽  
Epoxy Resin ◽  
Three Dimensional ◽  
Intervertebral Discs ◽  
Strontium Carbonate ◽  
Ct Number ◽  
Dental Imaging ◽  
3 Dimensional ◽  
Body Tissues

Objective: The aim of this study was to construct an anthropomorphic maxillofacial phantom for dental imaging and dosimetry purposes using three-dimensional (3D) printing technology and materials that simulate the radiographic properties of tissues. Methods: Stereolithography photoreactive resins, polyurethane rubber and epoxy resin were modified by adding calcium carbonate and strontium carbonate powders or glass bubbles. These additives were used to change the materials’ CT numbers to mimic various body tissues. A maxillofacial phantom was designed using CT images of a head. Results: Commercial 3D printing resins were found to have CT numbers near 120 HU and were used to print intervertebral discs and an external skin for the maxillofacial phantom. By adding various amounts of calcium carbonate and strontium carbonate powders the CT number of the resin was raised to 1000 & 1500 HU and used to print bone mimics. Epoxy resin modified by adding glass bubbles was used in assembly and as a cartilaginous mimic. Glass bubbles were added to polyurethane rubber to reduce the CT number to simulate soft tissue and filled spaces between the printed anatomy and external skin of the phantom. Conclusion: The maxillofacial phantom designed for dental imaging and dosimetry constructed using 3D printing, polyurethane rubbers and epoxy resins represented a patient anatomically and radiographically. The results of the designed phantom, materials and assembly process can be applied to generate different phantoms that better represent diverse patient types and accommodate different ion chambers.

Using Calcium Carbonate/Hydroxide and Barium Carbonate to Remove Sulphate from Mine Water

2017 ◽  
Vol 36 (2) ◽  
pp. 264-272 ◽  
Author(s):  
Vhahangwele Akinwekomi ◽  
Johannes P. Maree ◽  
Christian Wolkersdorfer
Keyword(s):  
Calcium Carbonate ◽  
Mine Water ◽  
Barium Carbonate ◽  
Carbonate Hydroxide ◽  
Calcium Carbonate Hydroxide

scholarly journals Local Light‐Controlled Generation of Calcium Carbonate and Barium Carbonate Biomorphs via Photochemical Stimulation

2021 ◽  
Author(s):  
Arianna Menichetti ◽  
Alexandra Mavridi‐Printezi ◽  
Giuseppe Falini ◽  
Patricia Besirske ◽  
Juan Manuel García‐Ruiz ◽  
...  
Keyword(s):  
Calcium Carbonate ◽  
Barium Carbonate

scholarly journals Purification of Industrial Copper Electrolyte from Bismuth Impurity

Minerals ◽  
2021 ◽  
Vol 12 (1) ◽  
pp. 36
Author(s):  
Patrycja Kowalik ◽  
Dorota Kopyto ◽  
Mateusz Ciszewski ◽  
Michał Drzazga ◽  
Katarzyna Leszczyńska-Sejda
Keyword(s):  
Barium Sulfate ◽  
Barium Carbonate ◽  
Lead Sulfate ◽  
Strontium Carbonate ◽  
Barium Hydroxide ◽  
Process Time ◽  
Purification Process ◽  
Copper Electrolyte ◽  
Bismuth Concentration ◽  
Main Components

This work focused on purifying copper electrolytes from a bismuth impurity on a laboratory scale. The electrolyte came from Polish copper electrorefineries with the content of main components, g/dm3: 49.6 Cu, 160 H2SO4. The electrolyte was enriched in bismuth by Bi2O3 addition. Purification of bismuth contamination was carried out using selected agents with adsorbing effects, such as barium hydroxide octahydrate, strontium carbonate, barium carbonate, barium and lead sulfates. The trials were performed until achieving the Bi level—below 0.1 g/dm3. During the experiments, it was noticed that electrolyte purification degree depends on initial Bi concentration in electrolyte, time and temperature, as well as on the type and amount of the bismuth-lowering agent. The most satisfactory results of Bi impurity removal were with additions of barium hydroxide octahydrate, strontium carbonate and barium carbonate to electrolyte at 60 °C for 1 h. These parameters revealed the highest electrolyte purification degree. Bismuth is not removed effectively from electrolytes by barium sulfate or lead sulfate addition. The efficiency of the purification process is much higher when the agents are added to the solution in the form of carbonates or hydroxides. Extending the electrolyte purification process time may cause dissolution of bismuth from the resulting precipitate and increase of bismuth concentration in electrolytes.

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