amorphous sodium grinding

  • Home
  • >
  • amorphous sodium grinding

Solid-state characteristics of amorphous sodium ...

Methods: Sodium indomethacin (SI) was subjected to lyophilization from aqueous solution, rapid precipitation from methanol solution, and dehydration followed by grinding to produce, in each case, a completely amorphous form. The amorphous form of SI was analyzed using DSC, XRD, thermomicroscopy and FTIR.

More

Solid-State Characteristics of Amorphous Sodium ...

高达12%返现  Sodium indomethacin (SI) was subjected to lyophilization from aqueous solution, rapid precipitation from methanol solution, and dehydration followed by grinding to produce, in each case, a completely amorphous form. The amorphous form of SI was analyzed using DSC, XRD, thermomicroscopy and FTIR.

More

US5510096A - Amorphous sodium silicate powder -

Amorphous sodium silicate powder exhibiting excellent water softening power and suitable as a detergent builder is provided. This amorphous sodium silicate powder is characterized in that when the molar ratio of SiO 2 /Na 2 O is expressed by n and the specific surface area thereof is expressed by S(m 2 /g), the following expressions: 1.20≦n≦1.60 0.10≦S≦0.90 and 0.008×n 8 .6 ≦S≦0 ...

More

EP0692453A1 - Amorphous sodium silicate powder -

Amorphous sodium silicate powder exhibiting excellent water softening power and suitable as a detergent builder is provided. This amorphous sodium silicate powder is characterized in that when the molar ratio of SiO₂ / Na₂ O is expressed by n and the specific surface area thereof is expressed by S (m²/g), the following expressions : 1.20 ≦ n ≦ 1.60 0.10 ≦ S ≦ 0.90 and 0.008 x n 8 ...

More

Amorphous sodium silicate-metal sulfate composite powder ...

Amorphous sodium silicate-sodium sulfate composite powder DEG* 1 Content Average Average Amount Ca Moisture Fusing addition of Specific primary secondary of binding absorp- tempera- amount at sulfur surface particle particle fine capa- tion ture grinding element Molar area size* 2 size* 3 crystals city amount (°C.) (wt %) (wt %) ratio (m 2 /g ...

More

Amorphous sodium silicate powder - Tokuyama Corporation

Amorphous sodium silicate cullet obtained by the cooling is ground so that the molar ratio n and the specific surface area S may satisfy the above-mentioned value ranges and the above-mentioned relation. The grinding can be carried out according to a known grinding method.

More

Amorphous Ultrafine Particle Preparation for Improvement ...

Grinding aids that have been used for grinding drugs include sodium chloride for dexamethasone, amorphous magnesium aluminosilicate for ketoprofen, indomethacin, naproxen and

More

Influence of mechanical properties on milling of amorphous ...

Oct 01, 2021  Size reduction ratio of amorphous (a-c) and crystalline specimens (d-f) as a function of grinding time at 30 Hz for each six materials at 4 different relative humidities from 5 to 74%RH; (a) fused silica; (b) lithium silicate; (c) sodium aluminium silicate; (d) quartzite; (e) lithium silicate; (f) sodium aluminium silicate.

More

Using Thermal Techniques for Amorphous Materials

Sodium Indomethacin . 24 Na . Tong and Zografi. Pharm Res. 1999, 16, 1186-1192 • Three methods used to make amorphous material –Grinding, freeze drying, solvent evaporation • All amorphous based on XRPD data • DSC data collected showed the same thermal properties for all three preparations • Sodium indomethacin (SI) exhibits higher Tg ...

More

Multistep Crystallization Pathways in the Ambient ...

Nov 01, 2021  Since grinding is a standard technique in the cement industry, an industrial scale implementation may be feasible. ... Synthesis of Amorphous Sodium Calcium Carbonate (aNaSiCC) Sodium carbonate (0.257 g, 2.4 mmol) was treated with calcium carbonate (0.243 l g, 2.4 mmol) in a planetary ball mill (Pulverisette 7 Classic, Fritsch).

More

Amorphization of Indomethacin by Co-Grinding with Neusilin ...

Aug 23, 2006  The percent crystallinity in the samples was determined from ATR-FTIR scans chemometrically. The physical stability of these co-ground amorphous powders was evaluated at 40°C/75% RH and 40°C/0% RH. The lower the ratio of indomethacin to Neusilin US2, the faster is the amorphization during co-grinding.

More

Effect of mechanochemical grinding conditions on the ...

Neat grinding of KTZ-FA and KTZ-SA resulted in co-amorphous and amorphous formulations while liquid-assisted grinding resulted in the formation of high quality cocrystals. The formed cocrystals presented enhanced dissolution rates in comparison to the bulk drug.

More

Effects of water vapor absorption on the physical and ...

This study reports on the effects that water absorbed into amorphous sodium indomethacin (NaIMC) can have on simultaneous tendencies to crystallize to its trihydrate form and to undergo base-catalyzed hydrolysis because of the plasticizing effects of water on molecular mobility. Measurement of water vapor absorption at 30°C and powder x-ray diffraction patterns as a function of relative ...

More

Preparation and Characterization of Solid Dispersions ...

Herein, amorphous curcumin (CUR) and amorphous solid dispersions (SDs) consisting of CUR, hy Preparation and Characterization of Solid Dispersions Composed of Curcumin, Hydroxypropyl Cellulose and/or Sodium Dodecyl Sulfate by Grinding with Vibrational Ball Milling Pharmaceuticals (Basel). 2020 Nov 12;13(11) :383. doi ...

More

OSHA Silica Rule - Misconception of Glass Dust TERRAZZCO

Dec 08, 2017  Today silica is found in many building materials, with dust forming by cutting, grinding, or drilling these materials on the construction site. Crystalline Silica Glass is manufactured using sand otherwise known by its chemical name “silica dioxide”, forming

More

Introduction to XRPD Data Analysis

– Amorphous materials, like glass, do not produce sharp diffraction peaks. Slide ‹#› of 20 Scott A Speakman, Ph.D. [email protected] Position [°2Theta] (Cu K-alpha) 15 20 25 30 35 40 Quartz Cristobalite Glass The X-ray diffraction pattern is a fingerprint that lets

More

Pharmaceuticals Free Full-Text Preparation and ...

Solubility is an important physicochemical property affecting drug bioavailability. One approach to improve drug solubility is using amorphous formulations, which can improve solubility by up to a 1000-fold. Herein, amorphous curcumin (CUR) and amorphous solid dispersions (SDs) consisting of CUR, hydroxypropyl cellulose (HPC) and/or sodium dodecyl sulfate (SDS) were developed using vibrational ...

More

Difference Between Amorphous and Crystalline Solid ...

Oct 09, 2011  The key difference between amorphous and crystalline solid is that the crystalline solids have an ordered long-range arrangement of atoms or molecules within the structure, whereas the amorphous solids lack ordered long-range arrangement.. We can classify solids into two as crystalline and amorphous depending on the atomic level arrangement. However, some solids are present in

More

Multinuclear MAS NMR Characterization of Fly‐Ash‐Based ...

Apr 27, 2020  For exploring the coordination environments of binary glass systems, this work presents multinuclear MAS NMR analysis of advanced geopolymer produced by solid state mechanochemical co-grinding of raw materials. The crystalline and amorphous phases of advanced geopolymer were already characterized with XRD in our previous study.

More

Silicon dioxide SiO2 - PubChem

NCI Thesaurus (NCIt) Silica is another name for the chemical compound composed of silicon and oxygen with the chemical formula SiO2, or silicon dioxide. There are many forms of silica. All silica forms are identical in chemical composition, but have different atom arrangements. Silica compounds can be divided into two groups, crystalline (or c ...

More

Amorphous Ultrafine Particle Preparation for Improvement ...

Grinding aids that have been used for grinding drugs include sodium chloride for dexamethasone, amorphous magnesium aluminosilicate for ketoprofen, indomethacin, naproxen and

More

Amorphous Form of Carvedilol Phosphate—The Case of ...

Sep 01, 2021  The crystalline structure of CVD to an amorphous one was carried out by grinding in a ball mill Retsch MM 400 (Retsch GmbH, Haan, Germany). A sample was ground in 8 cycles of 15 min with 5-min breaks to prevent CVD salt melting by the temperature generated in the process. During grinding, the mill’s operating frequency was 30 Hz.

More

US Patent for Amorphous form of dolutegravir Patent ...

Sep 02, 2012  The process according to claim 11 comprising the step of grinding or milling a crystalline dolutegravir sodium so as to provide amorphous dolutegravir sodium. 13. The process according to claim 11, wherein the grinding or milling is performed for about 200 to about 400 minutes.

More

Effect of grinding on the dehydration behavior of ...

May 01, 2008  Nedocromil sodium has a number of known hydrate states, a monohydrate, a trihydrate and a heptahemihydrate, including an amorphous state. Effect of grinding on the hydration states of nedocromil sodium crystals was studied. After grinding the trihydrate, heptahemihydrate was observed in the ground sample, even though, the water content in the ground sample was not sufficient to cover

More

Multistep Crystallization Pathways in the Ambient ...

Nov 01, 2021  Since grinding is a standard technique in the cement industry, an industrial scale implementation may be feasible. ... Synthesis of Amorphous Sodium Calcium Carbonate (aNaSiCC) Sodium carbonate (0.257 g, 2.4 mmol) was treated with calcium carbonate (0.243 l g, 2.4 mmol) in a planetary ball mill (Pulverisette 7 Classic, Fritsch).

More

Sodium‐Decorated Amorphous/Crystalline RuO2 with Rich ...

Jun 13, 2021  Herein, sodium-decorated amorphous/crystalline RuO 2 with rich oxygen vacancies (a/c-RuO 2) was developed as a pH-universal OER electrocatalyst. The a/c-RuO 2 shows remarkable resistance to acid corrosion and oxidation during OER, which leads to an extremely high catalytic stability, as confirmed by a negligible overpotential increase after ...

More

Energy-conserving synthesis of nanodispersed amorphous ...

Nanodispersed amorphous sodium silicate was synthe sized by the direct action of a solution of sodium hydroxide with a ratio giving a prescribed silicate modulus 2.2 – 3.8 on

More

Effects of water vapor absorption on the physical and ...

This study reports on the effects that water absorbed into amorphous sodium indomethacin (NaIMC) can have on simultaneous tendencies to crystallize to its trihydrate form and to undergo base-catalyzed hydrolysis because of the plasticizing effects of water on molecular mobility. Measurement of water vapor absorption at 30°C and powder x-ray diffraction patterns as a function of relative ...

More

MICROSCOPIC EXAMINATION OF THE URINE: CRYSTALS

Amorphous urates Uric acid Acid urates Monosodium urate or sodium urates Calcium oxalate (also neutral and alkaline urine) Normal Alkaline Crystals Amorphous phosphates Triple phosphates Ammonium biurate Calcium phosphate Calcium carbonate Abnormal

More

Amorphous Metal - an overview ScienceDirect Topics

Amorphous metal, also known as metallic glass, is a solid metallic material with disordered atomic-scale structure.The produce of amorphous metal must require an extremely fast cooling rate to prevent the nucleation of crystalline phases. As a structural and functional material, it has drawn increasing attention from both the scientific and industrial communities due to its unique characteristic.

More

PROCESSING OF SERPENTINITE TAILINGS TO PURE

Filtrate (Sodium silicate solution) Grinding + Magnetic separation Acidic leaching (60°C, s:l = 2:5) Acidic leaching (60°C, s:l = 1:6) Filtration I Precipitation Filtration II + Washing Undissolved residue II Filtrate (Solution of Cl-) 5 M NaOH 2.5 M solution of Na+ Figure 1. Two stage process of amorphous silica synthesis from serpentinite.

More

MoO2 nanosheets embedded in amorphous carbon matrix for ...

Oct 18, 2017  MoO 2 nanosheets embedded in the amorphous carbon matrix (MoO 2 /C) are successfully synthesized via a facile hydrothermal method and investigated as an anode for sodium-ion batteries. Because of the efficient ion transport channels and good volume change accommodation, MoO 2 /C delivers a discharge/charge capacity of 367.8/367.0 mAh g −1 with high coulombic efficiency

More

Amorphous Solid - Definition, Properties, Difference ...

Amorphous Solid - An amorphous solid is a solid that lacks an ordered internal structure. Amorphous solids, lacking the three-dimensional long-range order of a crystalline material, possess a more random arrangement of molecules, exhibit short-range order over a few molecular dimensions.

More

A Si/C nanocomposite anode by ball milling for highly ...

Sep 01, 2016  The mechanical treatment by grinding could ignite the sodiation activity of the Si/C hybrids, which could be assigned to the formation of numerous nanodomains of Si and amorphization of graphite. The high-energy grinding process could prompt the destruction of the crystalline graphite, leading to amorphous carbon substances.

More