Nanopowders of Centella asiatica was produced using planetary ball mill by varying milling parameters such as milling time, mass concentration, and bead amount. Particle size analysis employing photon correlation spectroscopy was carried out to record the effect of milling parameters on the particle size produced. The morphology of milled powders was also analyzed using a field emission
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the ball milling effective to develop solid solubil ity of Cr to Fe powder because the high energy kinetics and the balls slugging the sample powder d uring ball milling process.The solid solubility when ball milling process is increased because the diffusion of the component atom increased. It is
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The mixtures were milled in a high energy ball mill (pulverisette 4 Vario-Plantary Mill, Fritsch) with a ball to powder weight ratio of 10:1 and ethanol as process control agent. The steel vial of the ball mill had 250 ml capacity. 21.858 g of powders were put into the container and equal number of steel balls of 1 and 2 cm in diameters were added.
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The mixtures were transferred into 10 mL zirconium oxide lined grinding jars containing one 12 mm diameter aluminium oxide ceramic milling ball and milled at a frequency of 30 s −1 for 5 min using a Retsch MM200 mill (Castleford, UK). The product was collected and sieved with an 80 μm orifice sieve.
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A simple ball milling route to the tetrayanoborate anion is presented: The K[B(CN)4] synthesis is one fine example, how a synthesis problem based on solubility may be solved by a ball milling
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The use of ball milling as a micronization technique for enhancing drug solubility is well supported by literature dating as far back as the 1970s. Apart from its comminution function, ball milling also serves as an intensive mixing technique capable of producing co-ground drug-excipient mixtures comprising amorphous drug forms intimately mixed
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In the first-part, two excipients (HPMC and soluplus) were selected from seven, and the optimal ball-milling parameters of speed and time (18 Hz, 15 min) were determined based on solubility-enhancement and flow-ability criteria.
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By 10 h of ball milling with the optimized milling parameters, D50 and WC grain size of the ball milled WC–Co powder were about 400 nm and 10 nm, respectively. Main effects on WC grain size (a
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solubility of the pure drug and its physical dispersions. Using ball milling technique the physical dispersions of Nimesulide with the polymers, prepared in the ratios of 1:1, 1:3, 1:5 were subjected to size reduction for two different time intervals of 30 min and 90 min,
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Electrochemical kinetic parameters for carbon steel powders produced by high-energy ball milling for 2, 3, and 5 h and immersed in NaOH and NaCl solutions are tabulated in Table 2. The results were obtained from the deconstruction of polarization curves in terms of the superposition model and the mixed-potential theory [ 44 , 45 ].
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The study was a pioneering attempt to assess the influence of the structural polymorphism (forms I, II, III) of benzocaine on its solubility, apparent solubility, and chemical stability, which are vital parameters for preformulation and formulation work.
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In the first-part, two excipients (HPMC and soluplus) were selected from seven, and the optimal ball-milling parameters of speed and time (18 Hz, 15 min) were determined based on solubility-enhancement and flow-ability criteria.
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These factors include i) milling time-related parameters (pause time, number of milling cycles and time of each cycle), ii) speed, iii) milling ball size, and iv) solid to solvent ratio. Nanosization by planetary ball mill significantly resulted in enhancing the dissolution rate and bioavailability of different drugs, like clarithromycin 5 and
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Solubility Study in Ag-Cu Binary System Prepared By Ball Milling Process S. M. M. Shafiei*, E. Salahi, S. A. Tayebi Fard Materials and Energy Research Center (MERC) (*) Corresponding author: [email protected] (Received:18 Mar. 2012 and Accepted: 23 June 2012) Abstract: Solid solutions of Ag-Cu were prepared via ball milling process, for
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the ball milling effective to develop solid solubil ity of Cr to Fe powder because the high energy kinetics and the balls slugging the sample powder d uring ball milling process.The solid solubility when ball milling process is increased because the diffusion of the component atom increased. It is
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The effects of milling parameters such as balls diameters and ball milling speed defined by the number of balls from vials is an important parameter a milling process. extended solubility
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-Fe-Cr phase was investigated using formula Fe80Cr20. Ball milling process and ultrasonic technique is successfully done to develop solid solubility and improve homogenous, respectively. However, the effect of the Cr to Fe powder is not complete investigated using combination of its process. Ball milling is conducted by milling time of 60 hours and ultrasonic technique were carried out at
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The damaged starch content and solubility of wheat starch (A), A-type (B) and B-type (C) starch granules after ball milling treatment for different time. 10 min, 20 min, 30 min, 40 min and 60 min refer to ball milling time.
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solubility of the pure drug and its physical dispersions. Using ball milling technique the physical dispersions of Nimesulide with the polymers, prepared in the ratios of 1:1, 1:3, 1:5 were subjected to size reduction for two different time intervals of 30 min and 90 min,
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The effect of time and frequency of the ball milling process on the extrudates were determined. The ball milling frequency was set 20, 30, or 40 Hz and the milling time to 30 min. Then, the milling time was set to 30, 40, and 50 min at milling frequency of 30 Hz. The samples were fed into the extrusion system.
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High-energy ball milling is a ball milling process in which a powder mixture placed in a ball mill is subjected to high-energy collisions from the balls. High-energy ball milling, also called mechanical alloying, can successfully produce fine, uniform dispersions of oxide particles in nickel-base super alloys that
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High-energy ball milling is a ball milling process in which a powder mixture placed in a ball mill is subjected to high-energy collisions from the balls. High-energy ball milling, also called mechanical alloying, can successfully produce fine, uniform dispersions of oxide particles in nickel-base super alloys that
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In this study, chitosan flake was micronized in a ball mill to make fine powder. The effects of the milling on properties of chitosan, such as particle size, molecular parameters, bulk density, crystalline structure, color, chemical structure, and solubility, were investigated.
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High-energy ball milling is a ball milling process in which a powder mixture placed in a ball mill is subjected to high-energy collisions from the balls. High-energy ball milling, also called mechanical alloying, can successfully produce fine, uniform dispersions of oxide particles in nickel-base super alloys that
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Solubility Study in Ag-Cu Binary System Prepared By Ball Milling Process S. M. M. Shafiei*, E. Salahi, S. A. Tayebi Fard Materials and Energy Research Center (MERC) (*) Corresponding author: [email protected] (Received:18 Mar. 2012 and Accepted: 23 June 2012) Abstract: Solid solutions of Ag-Cu were prepared via ball milling process, for
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However, the K a also increased with milling time increased, it showed a maximum at 2.7 × 10 −3 /s at 30-min milling, and then it decreased to 1.56 × 10 −3 /s by 60-min milling. The higher solubility than that of the intact crystal was due to the involvement of unstable amorphous parts.
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The effect of time and frequency of the ball milling process on the extrudates were determined. The ball milling frequency was set 20, 30, or 40 Hz and the milling time to 30 min. Then, the milling time was set to 30, 40, and 50 min at milling frequency of 30 Hz. The samples were fed into the extrusion system.
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The minimum achievable grain size and extent of alloying depend on a number of parameters i.e., type of high-energy ball mill, milling container, ball-to-powder weight ratio, milling speed, grinding medium, extent of filling of the vial, milling atmosphere, process controlling agents, milling temperature, type of material being milled etc. Synthesis of nanocrystalline metals and alloys, using
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However, the K a also increased with milling time increased, it showed a maximum at 2.7 × 10 −3 /s at 30-min milling, and then it decreased to 1.56 × 10 −3 /s by 60-min milling. The higher solubility than that of the intact crystal was due to the involvement of unstable amorphous parts.
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by mill operating parameters. It is hoped that this work can be used as a precursor to the development of a model that can predict liberation given the various ranges of operating parameters. Mill speed, mill charge, ball size, and wet grinding are the parameters which have been selected for the present study. It is hoped that the analysis of the
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