The past decades have witnessed great advances in nanotechnology since tremendous efforts have been devoted for the design, synthesis, and application of nanoparticles. …
For example, the calcium sulfate whiskers with a diameter of 1.0–3.0 μm, a length of 20–80 μm, and an aspect ratio of 10–50 were prepared from the non-sintered raw material, while calcium sulfate whiskers with a diameter of 0.2–0.8 μm, a length of 30–240 μm, and an aspect ratio of 180–360 were produced from sintered raw material.
Synthesis of precipitated calcium carbonateFollowing is a typical procedure for the synthesis of calcium carbonate, which was used in the investigation of the influence of sodium carbonate concentration. A quantity of 0.03 mol calcium sulfate dihydrate (Mallinckrodt, reagent) was added to 50 ml of DI water and then was heated to …
A high-purity and predictable calcium sulfate (CS) synthesis process is desirable in the medical industry. The objective of this study was to develop a one-pot …
The obtained fine biocompatible powders of calcium sulfate both after synthesis and after heat treatment at temperature not above 600 °C can be …
Calcium phosphate/calcium sulphate powders were synthesized by wet method. The effects of the initial calcium/phosphorus molar ratio and the pH of the solution on the microstructure and phase composition were studied by SEM, XRD, and FTIR spectroscopy. The results show that the pH value was the predominant parameter for the …
The past decades have witnessed great advances in nanotechnology since tremendous efforts have been devoted for the design, synthesis, and application of nanoparticles. However, for most mineral materials such as calcium sulfate, it is still a challenge to prepare their nanoparticles, especially with uniform size and high monodispersity. In this …
Synthesis Of Calcium Sulphate Flowsheet. Synthesis Of Calcium Sulphate Flowsheet Hyfinance is a largescale mining enterprise integrating R & D, production and sales Over the years, it has been committed to technological innovation of products and always provides the best technology to customers In more than 160 countries around the world, …
The addition of ammonium sulphate alone increases the hardness. ln some countries mixtures of either calcium nitrate and magnesium nitrate or ammonium sulphate and ammonium phosphate are commonly used. An effective but more expensive stabilising agent, as least used in previous years, is the mixture of boric acid, diammonium …
the synthesis of nanosized calcium sulfate, three different types of surfactants have also been studied in this work such as TritonX-114, SDBS, and CTAB, shown in Scheme 1.
Calcium sulfate hemihydrate with different structures and morphologies has a broad scope of applications. Herein, we reported a strategy for nanosized calcium sulfate through room-temperature microemulsion by using calcium carbonate and sulfuric acid. After characterizations, it was indicated that the morphology of calcium sulfate products …
high temperature, porous calcium carbonate, and an oxygen atmosphere as conditions. Those methods both need high temperatures. Thus, excessive energy consumption and environmental requirements pro-moted the exploration of novel and ecient methods for preparing anhydrous calcium sulfate whiskers. Calcium carbonate made up nearly 4% …
One-Step Synthesis of Calcium Sulfate Hemihydrate Nanofibers from Calcite at Room Temperature. Preparing publication...
The obtained fine biocompatible powders of calcium sulfate both after synthesis and after heat treatment at temperature not above 600 °C can be recommended as a filler for producing unique ...
Here we report a facile and cost-effective wet-chemical approach to the synthesis of calcium sulfate hemihydrate nanowires (HH NWs, CaSO4.0.5H2O), and their robust performance in immobilizing ...
Herein, calcium sulfate has been successfully synthesized through a room-temperature microemulsion method. During the synthesis of nanosized calcium …
All reagents used in the study were obtained from Sigma–Aldrich (Seelze, Germany) with no further purification. The synthesis process is summarized in Fig. …
Calcium sulfate whisker (CSW) is a single-crystal fiber with an aspect ratio of 30–80 μm [1–3], and it has wide applications as insulating [], abrasive [5, 6], adsorbent [], coating [] and biomedical materials [9–11] due to its excellent properties such as high strength, non-toxicity, high chemical resistance, good thermal stability, low cost, and …
Herein, the feasibility of preparing long and homogeneous hemihydrate (HH) whiskers using waste oyster shell was investigated. The whiskers formed from the sintered raw material had higher aspect ratios and more uniform morphology than non-sintered. The effect of reaction temperature, reaction time, and concentration were investigated. It was found …
The preparation of calcium sulfate whisker (CSW) from waste PG could solve the large amounts of PG accumulation and substitute the plant-based pulp fiber, reducing the pollution of wastewater in paper and pulp industries. In this work, the CSW, which length could reach 230 μm, was fabricated from the PG in a glycerol-water solution.
In Fig. 5b, the peaks at 16.77°, 20.59°, 23.04°, 28.57°, 47.02° corresponded to ammonium sulfate (JCPDS card- 01-073-6838). The XRD analysis confirmed that the major phase constituted of ammonium sulfate. FT-IR analysis. FT-IR analysis of natural gypsum and the product formed is shown in Fig. 6.The band near 3620 and 3400 cm −1 depicts …
Download scientific diagram | Conceptual flowsheet making use of magnesium sulphate crystallization and calcination to effect the regeneration of hydrochloric acid in a laterite leaching process ...
calcium sulfate whiskers in Fig. 2d, it indicated the crystalline nature of calcium sulfate, which performed fringe spacing with 1.39 Å and 1.85 Å, which could be anindex to(242) and (321)plane ofanhydrous calcium sulfate, as well as the SEAD pattern inset Fig. 2c.Also, from the lattice fringes on the HR-TEM image, it indi-
X-ray diffraction (XRD) analysis was also employed for determining phase composition of products. A flow sheet of the process route is given in Fig. 2. Download : Download high-res image (257KB ... Additives-assisted hydrothermal synthesis of calcium sulfate whisker and its growth mechanism. J. Chin. Ceram. Soc., 42 (2014), pp. …
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WEBCalcium sulphate (CaSO 4), one of biomaterial with high potential for dental and orthopedic applications due to its similarity to the mineral constituents of bone in the …
vibration were identified andlinked to sulphate. The quality of the synthesized calcium sulphate shows similarity with the commercial reagent grade calcium sulphate. In conclusion, limestone waste could be a suitable material for making high quality calcium sulphate. KEYWORDS: Limestone waste, calcium sulphate, synthesis, mines, quality …
Citation: T oyama T, Kameda S, Nishimiya N (2013) Synthesis of Sulfate-ion-substituted Hydroxyapatite from Amorphous Calcium Phosphate. Bioceram Dev Appl S1: 01 1. doi: 10.4172/2090-5025.S1-01 1 ...
The morphology of calcium sulphate whiskers is analyzed with a scanning electron microscope (SEM) and optical microscope. SEM involves dilution with anhydrous ethanol, gold coating, and glass substrate placement [53]. The synthesis methods for calcium sulfate whiskers with its advantages and disadvantages are given in Table 2.
Calcium sulfate hemihydrate, also known as bassanite or Plaster of Paris, is one of the most extensively produced inorganic materials worldwide. Nowadays, bassanite is mainly obtained by thermal dehydration of calcium sulfate dihydrate (gypsum) – a process that consumes considerable amounts of energy and thus leaves a significant …
Calcium aluminosulfate (3CaO.3Al_2O_3.CaSO_4or C_4A_3S) was prepared by chemical synthesis from the nitrate salts and aluminum sulfate. C_4A_3S was the main phase after calcination at 1100^{circ}C.
A high-purity and predictable calcium sulfate (CS) synthesis process is desirable in the medical industry. The objective of this study was to develop a one-pot method for the direct preparation of calcium sulfate hemihydrates (CSHs; such as the α- and β-forms) in a CaCl 2 solution.
Cetyl trimethyl ammonium bromide (CTAB), a chemical surfactant was used in different proportions in the present study. Some of its physical properties are summarized in Table 1.Calcium chloride [CaCl 2] and ammonium per sulfate [(NH 4) 2 SO 4] were the two precursors implied for the synthesis of nano-CaSO 4.Their reaction parameters which …