scholarly journals The influence of impurity inorganic salts on the physico-chemical and mechanical properties of potassium sulfate and potassium-magnesia

2019 ◽  
Vol 55 (2) ◽  
pp. 223-232
Author(s):  
V. V. Shevchuk ◽  
L. V. Dikhtievskaya ◽  
T. P. Sokolova ◽  
L. F. Shlomina ◽  
N. I. Pazniak
Keyword(s):  
Mechanical Properties ◽  
Granulometric Composition ◽  
Chemical Nature ◽  
Negative Influence ◽  
Model System ◽  
Potassium Sulfate ◽  
Inorganic Salts ◽  
Suppression Effect ◽  
Peg 400 ◽  
Physico Chemical

Complex research of the most important physico-chemical and mechanical properties (granulometric composition, hygroscopicity, caking, dusting, compactability, friability) of model system based on potassium sulfate and experimental samples of potassium sulfate and potassium-magnesia has been conducted. The experimental samples of potassium sulphate and potassium-magnesia were obtained in the processing of polymineral ore in the presence of various amounts of impurity inorganic salts (magnesium sulfate and chloride, sodium chloride). The obtained chlorine-free fertilizers have low hygroscopicity and low caking, but they are characterized by high dusting. Studies of the influence of dust-suppressors of different chemical nature on dusting of model and experimental samples of potassium sulfate and potassium-magnesia have shown that polyethylene glycol PEG-400 has the highest dust suppression effect on these fertilizers. Using PEG-400 has no negative influence to the friability, caking and compactability of fertilizers.

scholarly journals Development of conditioning technologies of fine-dispersed and granular potassium chloride

2019 ◽  
Vol 55 (3) ◽  
pp. 288-298
Author(s):  
V. V. Shevchuk ◽  
L. V. Dikhtievskaya ◽  
L. F. Shlomina ◽  
N. P. Krutko ◽  
A. D. Markin
Keyword(s):  
Mechanical Properties ◽  
Potassium Chloride ◽  
Negative Influence ◽  
Mineral Fertilizers ◽  
Organic Modifiers ◽  
Physico Chemical ◽  
Inorganic And Organic

The factors of negative influence on properties of mineral fertilizers based on potassium chloride have been discussed and ways of their elimination have been investigated. The regularities of the influence of inorganic and organic modifiers on physico-chemical and mechanical properties of fine-dispersed and granular potassium chloride have been established. Technologies of producing potassium fertilizers with improved properties have been developed on the basis of the obtained data.

Physico-chemical and mechanical properties of organic-inorganic composites

2015 ◽  
Vol 37 (4) ◽  
pp. 369-374
Author(s):  
G.I. Khovanets’ ◽  
◽  
Y.G. Medvedevskikh ◽  
V.P. Zakordonskiy ◽  
V.V. Kochubey ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Inorganic Composites ◽  
Physico Chemical

Physico-Chemical Nature of Bacteriolysis

Nature ◽  
1944 ◽  
Vol 153 (3875) ◽  
pp. 169-170 ◽  
Author(s):  
W. A. DORFMAN
Keyword(s):  
Chemical Nature ◽  
Physico Chemical

scholarly journals Characterization and Analysis of the Carbonation Process of a Lime Mortar Obtained from Phosphogypsum Waste

2021 ◽  
Vol 18 (12) ◽  
pp. 6664
Author(s):  
María Isabel Romero-Hermida ◽  
Antonio María Borrero-López ◽  
Vicente Flores-Alés ◽  
Francisco Javier Alejandre ◽  
José María Franco ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Mineralogical Composition ◽  
Barium Sulphate ◽  
Negative Influence ◽  
Raw Material ◽  
Porous System ◽  
Waste Products ◽  
Liesegang Rings ◽  
Carbonation Process ◽  
Ultrasonic Propagation

This work addresses the reuse of waste products as a raw material for lime putties, which are one of the components of mortar. 1:3 Lime/sand mortars very similar to conventional construction mortars were prepared using a lime putty obtained from the treatment of phosphogypsum with sodium hydroxide. The physical, rheological and mechanical properties of this phosphogypsum-derived mortar have been studied, as well as the mineralogical composition, microstructure by scanning electron microscope (SEM) and curing process by monitoring carbonation and ultrasonic propagation velocity. Considering the negative influence of sulphates on the hardened material, the behaviour of the material after sulphates precipitation by adding barium sulphate was additionally tested. Carbonation progressed from the outside to the inside of the specimen through the porous system by Liesegang rings patterns for mortars with soluble sulphates, while the carbonation with precipitated sulphates was controlled by diffusion-precipitation. Overall, the negative influence of low-sulphate contents on the mechanical properties of mortars was verified. It must be highlighted the importance of their precipitation to obtain adequate performance.

scholarly journals Mechanical Properties of U-Cu Intermetallic Compound Measured by Nanoindentation

Materials ◽  
2018 ◽  
Vol 11 (11) ◽  
pp. 2215 ◽  
Author(s):  
Ruiwen Li ◽  
Chuan Mo ◽  
Yichuan Liao
Keyword(s):  
Mechanical Properties ◽  
Intermetallic Compound ◽  
Chemical Properties ◽  
Element Distribution ◽  
Treatment Temperature ◽  
Diffusion Method ◽  
Vacuum Furnace ◽  
Young’S Moduli ◽  
Pressure Diffusion ◽  
Physico Chemical

The physico-chemical properties of the Uranium intermetallic compound are of technological importance for improvement of the safety and compatibility of nuclear engineering systems. Diffusion couple samples with U and Cu were assembled and U-Cu intermetallic compounds were fabricated at interface by hot pressure diffusion method at a treatment temperature of 350 °C to 650 °C and at a pressure of 168 MPa in a vacuum furnace. The microstructure and element distribution of the compound phase have been studied by means of SEM, EDS, and XRD. The result showed that a new phase was developed to a thickness of approximately 10 μm with a ration of U:Cu with 1:5. Mechanical properties such as elastic moduli and hardness of the compound have been studied by means of nanoindentation. The nanoindentation testing on sample indicated that hardness of Uranium intermetallic compound are higher than that of metal U and Cu. Uranium intermetallic compound and U have a Young’s moduli with 121 GPa, 160 GPa respectively. The elastic/plastic responses of U-Cu intermetallic compound and U under nanoindentation tests were also discussed in detail.

Physico Chemical Characterization of Nanofibrous Poly(Ε-Caprolactone) Electrospun Templates for Cell Adhesion

MRS Advances ◽  
2017 ◽  
Vol 2 (49) ◽  
pp. 2689-2694
Author(s):  
Karla A. Gaspar-Ovalle ◽  
Juan V. Cauich-Rodriguez ◽  
Armando Encinas
Keyword(s):  
Mechanical Properties ◽  
Differential Scanning Calorimetry ◽  
Cell Adhesion ◽  
Tensile Modulus ◽  
Chemical Characterization ◽  
Mechanical Analysis ◽  
Scanning Calorimetry ◽  
Water Contact ◽  
Physico Chemical ◽  
Static Water

ABSTRACTNanofibrous mats of poly ε-caprolactone (PCL) were fabricated by electrospinning. The nanofiber structures were investigated and characterized by scanning electron microscope, differential scanning calorimetry, thermogravimetric analysis, dynamic mechanical analysis, static water-contact-angle analysis and mechanical properties. The results showed that the nanofibrous PCL is an ideal biopolymer for cell adhesion, owing to its biocompatibility, biodegradability, structural stability and mechanical properties. Differential scanning calorimetry results showed that the fibrous structure of PCL does not alter its crystallinity. Studies of the mechanical properties, wettability and degradability showed that the structure of the electrospun PCL improved the tensile modulus, tensile strength, wettability and biodegradability of the nanotemplates. To evaluate the nanofibrous structure of PCL on cell adhesion, osteoblasts cells were seeded on these templates. The results showed that both adhesion and proliferation of the cells is viable on these electrospun PCL membranes. Thus electrospinning is a relatively inexpensive and scalable manufacturing technique for submicron to nanometer diameter fibers, which can be of interest in the commodity industry.

METAL COMPOSITE MATERIALS BASED ON TITANIUM ALLOYS, REINFORCED WITH REFRACTORY PARTICLES (review)

2021 ◽  
pp. 36-45
Author(s):  
E.I. Krasnov ◽  
◽  
V.M. Serpova ◽  
L.G. Khodykin ◽  
A.V. Gololobov ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Composite Materials ◽  
Literature Review ◽  
Titanium Alloys ◽  
Chemical Nature ◽  
Physical And Mechanical Properties ◽  
Metal Composite ◽  
The Matrix ◽  
Metal Composite Materials

Presents a literature review in the field of methods for strengthening titanium and its alloys by introducing various refractory particles into the matrix. The main problematic issues related to the chemical nature of refractory particles and titanium alloys that arise during hardening are briefly described. The main structural, physical and mechanical properties and morphology of such metal composite materials are described. The dependence of the influence of various refractory particles and their amount, as well as the effect of heat treatment on the physical and mechanical properties of microns based on titanium alloys, is presented.

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