Separation of boron and magnesium by stepwise crystallization of sulfuric acid leachate of high-magnesium borate minerals

2021 ◽  
pp. 105703
Author(s):  
Yuzhe Liu ◽  
Peiyang Shi ◽  
Xiaohui Mei ◽  
Maofa Jiang
Keyword(s):  
Sulfuric Acid ◽  
Magnesium Borate ◽  
Borate Minerals

Ultrahigh-Field 25Mg NMR and DFT Study of Magnesium Borate Minerals

2017 ◽  
Vol 1 (6) ◽  
pp. 299-309 ◽  
Author(s):  
Bing Zhou ◽  
Alexandra Faucher ◽  
Robert Laskowski ◽  
Victor V. Terskikh ◽  
Scott Kroeker ◽  
...  
Keyword(s):  
Dft Study ◽  
Magnesium Borate ◽  
Ultrahigh Field ◽  
Borate Minerals

scholarly journals Characterization and Neutron Shielding Behavior of Dehydrated Magnesium Borate Minerals Synthesized via Solid-State Method

2013 ◽  
Vol 2013 ◽  
pp. 1-9 ◽  
Author(s):  
Azmi Seyhun Kipcak ◽  
Derya Yilmaz Baysoy ◽  
Emek Moroydor Derun ◽  
Sabriye Piskin
Keyword(s):  
Solid State ◽  
Boron Oxide ◽  
X Ray Diffraction ◽  
Magnesium Borate ◽  
Solid State Method ◽  
Neutron Shielding ◽  
Neutron Transmission ◽  
Boron Minerals ◽  
State Method ◽  
Borate Minerals

Magnesium borates are one of the major groups of boron minerals that have good neutron shielding performance. In this study, dehydrated magnesium borates were synthesized by solid-state method using magnesium oxide (MgO) and boron oxide (B2O3), in order to test their ability of neutron shielding. After synthesizing the dehydrated magnesium borates, characterizations were done by X-ray Diffraction (XRD), fourier transform infrared (FT-IR), Raman spectroscopy, and scanning electron microscopy (SEM). Also boron oxide (B2O3) contents and reaction yields (%) were calculated. XRD results showed that seven different types of dehydrated magnesium borates were synthesized. 1000°C reaction temperature, 240 minutes of reaction time, and 3 : 2, 1 : 1 mole ratios of products were selected and tested for neutron transmission. Also reaction yields were calculated between 84 and 88% for the 3 : 2 mole ratio products. The neutron transmission experiments revealed that the 3 : 2 mole ratio of MgO to B2O3neutron transmission results (0.618–0.655) was better than the ratio of 1 : 1 (0.772–0.843).

scholarly journals Magnesium Borate Synthesis by Microwave Energy: A New Method

2013 ◽  
Vol 2013 ◽  
pp. 1-6 ◽  
Author(s):  
Azmi Seyhun Kipcak ◽  
Emek Moroydor Derun ◽  
Sabriye Piskin
Keyword(s):  
Reaction Times ◽  
High Heat ◽  
New Method ◽  
X Ray Diffraction ◽  
Magnesium Borate ◽  
X Ray ◽  
Boron Minerals ◽  
Ft Ir ◽  
Borate Minerals

Magnesium borates are one of the major groups of boron minerals that have important properties such as high heat and corrosion resistances and high coefficients of elasticity. In this study, magnesium borate minerals are synthesized using boric acid and magnesium oxide with a new method of microwave, and the synthesized minerals are characterized by various analysis techniques. The results show that pure, “magnesium borate hydrate” minerals are obtained at the end of various steps. The characterization of the products is determined with the techniques of X-Ray Diffraction (XRD), Fourier Transform Infrared Spectroscopy (FT-IR), Raman Spectroscopy, and Scanning Electron Microscopy (SEM). Additionally, overall “magnesium borate hydrate” yields are calculated and found about 67% at 270 W, 8 minutes and 360 W, 3 minutes of reaction times, respectively.

scholarly journals The Synthesis and Physical Properties of Magnesium Borate Mineral of Admontite Synthesized from Sodium Borates

2014 ◽  
Vol 2014 ◽  
pp. 1-9 ◽  
Author(s):  
Azmi Seyhun Kipcak ◽  
Meral Yildirim ◽  
Sureyya Aydin Yuksel ◽  
Emek Moroydor Derun ◽  
Sabriye Piskin
Keyword(s):  
Physical Properties ◽  
Voltage Source ◽  
Magnesium Borate ◽  
Sem Images ◽  
Neutron Shielding ◽  
Code Number ◽  
Ir And Raman Spectroscopies ◽  
Ft Ir ◽  
Borate Minerals ◽  
Ir And Raman

Magnesium borates are significant compounds due to their advanced mechanical and thermal durability properties. This group of minerals can be used in ceramic industry, in detergent industry, and as neutron shielding material, phosphor of thermoluminescence by dint of their extraordinary specialties. In the present study, the synthesis of magnesium borate via hydrothermal method from sodium borates and physical properties of synthesized magnesium borate minerals were investigated. The characterization of the products was carried out by X-ray diffraction (XRD), Fourier transform infrared (FT-IR) and Raman spectroscopies, and differential thermal analysis and thermal gravimetry (DTA/TG). The surface morphology was examined by scanning electron microscopy (SEM). B2O3content was determined through titration. The electrical resistivity/conductivity properties of products were measured by Picoammeter Voltage Source. UV-vis spectrometer was used to investigate optical absorption characteristics of synthesized minerals in the range 200–1000 nm at room temperature. XRD results identified the synthesized borate minerals as admontite [MgO(B2O3)3·7(H2O)] with code number “01-076-0540” and mcallisterite [Mg2(B6O7(OH)6)2·9(H2O)] with code number “01-070-1902.” The FT-IR and Raman spectra of the obtained samples were similar with characteristic magnesium borate bands. The investigation of the SEM images remarked that both nano- and microscale minerals were produced. The reaction yields were between 75.1 and 98.7%.

scholarly journals Neutron Permeation Properties and Characterization of Synthesized Non-Hydrated Magnesium Borate Minerals

2014 ◽  
Vol 26 (18) ◽  
pp. 6033-6038 ◽  
Author(s):  
Azmi Seyhun Kipcak ◽  
Emek Moroydor Derun ◽  
Fatma Tugce Senberber ◽  
Ozgul Dere Ozdemir ◽  
Derya Yilmaz Baysoy ◽  
...  
Keyword(s):  
Magnesium Borate ◽  
Properties And Characterization ◽  
Borate Minerals ◽  
Permeation Properties

Preparation of Thin Cadmium Telluride Samples for Electron Microscope Studies

1974 ◽  
Vol 32 ◽  
pp. 548-549
Author(s):  
T. J. Magee ◽  
J. Peng ◽  
J. Bean
Keyword(s):  
Electron Microscope ◽  
Sulfuric Acid ◽  
Solid State ◽  
Sample Preparation ◽  
Cadmium Telluride ◽  
Potassium Dichromate ◽  
Optical Components ◽  
The Past ◽  
Solid State Devices

Cadmium telluride has become increasingly important in a number of technological applications, particularly in the area of laser-optical components and solid state devices, Microstructural characterizations of the material have in the past been somewhat limited because of the lack of suitable sample preparation and thinning techniques. Utilizing a modified jet thinning apparatus and a potassium dichromate-sulfuric acid thinning solution, a procedure has now been developed for obtaining thin contamination-free samples for TEM examination.

Physical, Chemical, and Crystallographic Characterization of Anodic Coatings on High Strength Aluminum Base Alloys

1976 ◽  
Vol 34 ◽  
pp. 636-637
Author(s):  
R. E. Herfert ◽  
N. T. McDevitt
Keyword(s):  
Sulfuric Acid ◽  
Salt Spray ◽  
High Strength ◽  
Environmental Stability ◽  
Anodic Films ◽  
Sodium Dichromate ◽  
Corrosion Resistant ◽  
Aerospace Applications ◽  
Bond Strengths ◽  
Adhesive Bonded Joints

Durability of adhesive bonded joints in moisture and salt spray environments is essential to USAF aircraft. Structural bonding technology for aerospace applications has depended for many years on the preparation of aluminum surfaces by a sulfuric acid/sodium dichromate (FPL etch) treatment. Recently, specific thin film anodizing techniques, phosphoric acid, and chromic acid anodizing have been developed which not only provide good initial bond strengths but vastly improved environmental durability. These thin anodic films are in contrast to the commonly used thick anodic films such as the sulfuric acid or "hard" sulfuric acid anodic films which are highly corrosion resistant in themselves, but which do not provide good initial bond strengths, particularly in low temperature peel.The objective of this study was to determine the characteristics of anodic films on aluminum alloys that make them corrosion resistant. The chemical composition, physical morphology and structure, and mechanical properties of the thin oxide films were to be defined and correlated with the environmental stability of these surfaces in humidity and salt spray. It is anticipated that anodic film characteristics and corrosion resistance will vary with the anodizing processing conditions.

Sign in / Sign up

Export Citation Format

Share Document