About Us

MINEVIK Machinery is a leading and pioneering enterprise with the most advanced international level in R&D, manufacturing and selling of large-scale crushing & screening plants and beneficiation plants.

large-scale crushing & screening plants and beneficiation plants.

All of our equipment have got ISO international quality system certification, European Union CE certification and Russian GOST certification.

  • In central China-Zhengzhou, covering 140 thousand square meters
  • Win-win cooperation and create more value to customers
  • Exported large quantities and high-end mobile crushing plant and milling equipments to Russia, Kazakhstan, Indonesia, Ecuador, South Africa, Nigeria, Turkey more than 100 countries .

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Our Products

AS a leading global manufacturer of crushing and milling equipment, we offer including quarry, aggregate, grinding production and complete stone crushing plant. We also supply individual crushers and mills as well as spare parts of them.

Services

Our goal is to guarantee the excellent operation equipment with high safety for our customers and minimize the downtime of the machine by predictive maintenance. Kefid service and original accessories can be 100% trusted at the time of maintenance.

SERVICE AND SUPPORT

Minevik service and original accessories can be 100% trusted at the time of maintenance.

ACCESSORIES CENTER

striving to enable customers to get the parts in the nearest place.

SALES MARKET

Our sales market is spread all over more than 100 countries and regions

amorphous selenium kinetics

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Nonisothermal crystallisation kinetics of amorphous

May 15, 2012· Selenium and its compounds continue to be a subject of great interest. In this study, the crystallisation kinetics of a Se chalcogenide glass produced by high-energy ball milling were studied using isoconversion methods, and the results were compared with those obtained using the melt-quenching and thermal evaporation thin-film techniques [6

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Crystallization kinetics of amorphous Se | SpringerLink

Jan 20, 2013· Differential scanning calorimetry was used to study crystallization behavior in selenium glass under non-isothermal conditions. The crystallization kinetics were described in terms of the Johnson–Mehl–Avrami nucleation-growth model; activation energies and kinetic parameter m JMA were determined. The study was performed in dependence with particle

More
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Crystallization of amorphous selenium films. I. Morphology

We report a study of the morphology and kinetics of crystallization of films of a‐Se vapor deposited on mica substrates. Morphological examination was facilitated by the complete dissolution of the amorphous component of the films by CS2, while the crystalline component was left essentially intact. Crystallization begins (in the temperature range 30–100°C) with the

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Substrate effects on the crystallization kinetics of

Sep 01, 1976· Thin Solid Films, 37 (1976) 215-222 CQ Elsevier Sequoia S.A., Lausanne-Printed in Switzerland 215 SUBSTRATE EFFECTS ON THE CRYSTALLIZATION KINETICS OF AMORPHOUS SELENIUM THIN FILMS DAVID D. THORNBURG Xerox Palo Alto Research Center, Palo Alto, Calif. 94304 (U.S.A.) (Received January 23, 1976; accepted February 16,

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Amorphous selenium and its alloys from early

Jul 27, 2009· Amorphous selenium and its alloys from early xeroradiography to high resolution X‐ray image detectors and ultrasensitive imaging tubes. B. A. Weinstein, A. Reznik, Comparative study of the photodarkening relaxation-kinetics in amorphous selenium for above-bandgap and sub-bandgap illumination, Applied Physics Letters, 10.1063/1.4892836

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X-ray Imaging Research Group Amorphous Selenium (a-Se

Amorphous Selenium (a-Se) Many of the detector systems being developed in our lab use a photoconductor called amorphous Selenium (a-Se) as the X-ray detector material, i.e. the material which 'catches the X-rays', and converts them to either charge or lower energy photons.

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Kinetic Processes in Amorphous Materials Revealed by

Kinetic Processes in Amorphous Materials Revealed by Thermal Analysis: Application to Glassy Selenium Jirˇí Málek * and Roman Svoboda Department of Physical Chemistry, Faculty of Chemical Technology, University of Pardubice, Studentská 95, 53210 Pardubice, Czech Republic * Correspondence: [email protected]; Tel.: +420-466-036-553

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Kinetic Processes in Amorphous Materials Revealed by

Kinetic Processes in Amorphous Materials Revealed by Thermal Analysis: Application to Glassy Selenium Jiří Málek * and Roman Svoboda Department of Physical Chemistry, Faculty of Chemical Technology, University of Pardubice, Studentská 95, 53210 Pardubice, Czech Republic * Correspondence: e-mail [email protected]; Tel.: +420-466-036-553

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Amorphous selenium (a-Se) avalanche photodetector for

Amorphous selenium (a-Se) avalanche photodetector for applications in Positron Emission Tomography (PET) Master of Science, 2011 Oleksandr Bubon Department of Physics Lakehead University Abstract . Although avalanche amorphous selenium (a-Se) is a very promising photoconductor for a

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Direct Electrochemical Pathways for Selenium Reduction in

12 小时前· Direct electrochemical reduction provides a novel strategy for selenium removal from complex wastewaters. While electrochemical Se(IV) reduction is thermodynamically favorable, anion structure reorganization hinders process kinetics and the phase of reduced Se(0) determines process performance. This study evaluates the thermodynamic and kinetic

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Crystallization kinetics of amorphous Se

Crystallization kinetics of amorphous Se Part 1. Interpretation of kinetic functions first industry usage of amorphous selenium dates back to the 1960s, certain physical processes vital for

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Crystallization kinetics of amorphous Se | SpringerLink

Jan 20, 2013· Differential scanning calorimetry was used to study crystallization behavior in selenium glass under non-isothermal conditions. The crystallization kinetics were described in terms of the Johnson–Mehl–Avrami nucleation-growth model; activation energies and kinetic parameter m JMA were determined. The study was performed in dependence with particle size, so that a novel approach to

More
[randpic]

Crystallization of amorphous selenium films. I. Morphology

We report a study of the morphology and kinetics of crystallization of films of a‐Se vapor deposited on mica substrates. Morphological examination was facilitated by the complete dissolution of the amorphous component of the films by CS2, while the crystalline component was left essentially intact. Crystallization begins (in the temperature range 30–100°C) with the formation and radial

More
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Crystallization kinetics of amorphous selenium prepared by

The polymorphous crystallization kinetics of a melt-quenched amorphous selenium (a-Se) under pressure was investigated by using a piston–cylinder pressure vessel over a pressure range of 0–1.0

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Kinetic Processes in Amorphous Materials Revealed by

Jul 26, 2019· In case of amorphous selenium, the position of T e appears to be driven more by viscous flow (in combination with surface tension) at low temperatures. Thus, the activation energy determined from the TMA measurements at low q + gets closer to E η.

More
[randpic]

Amorphous selenium and its alloys from early

Jul 27, 2009· Amorphous selenium and its alloys from early xeroradiography to high resolution X‐ray image detectors and ultrasensitive imaging tubes. B. A. Weinstein, A. Reznik, Comparative study of the photodarkening relaxation-kinetics in amorphous selenium for above-bandgap and sub-bandgap illumination, Applied Physics Letters, 10.1063/1.4892836

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Photodeposition of amorphous selenium films by the “selor

May 01, 1978· Thin Solid Films, 50 (1978) 293-300 Elsevier Sequoia S.A., Lausanne-Printed in the Netherlands 293 PHOTODEPOSITION OF AMORPHOUS SELENIUM FILMS BY THE "SELOR" PROCESS III: INTERPRETATION OF THE STRUCTURAL AND KINETICS STUDIES M. PERAKH AND A. PELED School of Applied Science and Technology The Hebrew University of Jerusalem (Israel) Discussion of the structural observations and the kinetics

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Anomalous high-pressure behavior of amorphous selenium

Sep 09, 2008· The high-pressure behavior of amorphous selenium has been investigated with time-resolved diamond anvil cell synchrotron x-ray diffraction and computed microtomography techniques. A two-step dynamic crystallization process is observed in which the monoclinic phase crystallized from the amorphous selenium and gradually converted to the trigonal phase, thereby explaining previously

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Kinetic Processes in Amorphous Materials Revealed by

Kinetic Processes in Amorphous Materials Revealed by Thermal Analysis: Application to Glassy Selenium Jirˇí Málek * and Roman Svoboda Department of Physical Chemistry, Faculty of Chemical Technology, University of Pardubice, Studentská 95, 53210 Pardubice, Czech Republic * Correspondence: [email protected]; Tel.: +420-466-036-553

More
[randpic]

Amorphous selenium (a-Se) avalanche photodetector for

Amorphous selenium (a-Se) avalanche photodetector for applications in Positron Emission Tomography (PET) Master of Science, 2011 Oleksandr Bubon Department of Physics Lakehead University Abstract . Although avalanche amorphous selenium (a-Se) is a very promising photoconductor for a

More
[randpic]

Crystallization kinetics of amorphous Se

Crystallization kinetics of amorphous Se Part 1. Interpretation of kinetic functions first industry usage of amorphous selenium dates back to

More
[randpic]

Crystallization of amorphous selenium films. I. Morphology

We report a study of the morphology and kinetics of crystallization of films of a‐Se vapor deposited on mica substrates. Morphological examination was facilitated by the complete dissolution of the amorphous component of the films by CS2, while the crystalline component was left essentially intact. Crystallization begins (in the temperature range 30–100°C) with the

More
[randpic]

Kinetic Processes in Amorphous Materials Revealed by

Jul 26, 2019· In case of amorphous selenium, the position of T e appears to be driven more by viscous flow (in combination with surface tension) at low temperatures. Thus, the activation energy determined from the TMA measurements at low q + gets closer to E η.

More
[randpic]

Crystallization of amorphous selenium films. I. Morphology

We report a study of the morphology and kinetics of crystallization of films of a‐Se vapor deposited on mica substrates. Morphological examination was facilitated by the complete dissolution of the amorphous component of the films by CS 2, while the crystalline component was left essentially intact. Crystallization begins (in the temperature range 30–100°C) with the

More
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Kinetics of the photostructural changes in a-Se films

The kinetics of the photodarkening effect has been studied experimentally for amorphous selenium (a-Se) layers at room temperature and at an elevated temperature (35 ° C) close to the glass transition. By switching an intense pumping light on and off with a period of 100 s, we have studied the kinetics of both the buildup of photodarkening and its relaxation (recovery).

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[randpic]

Amorphous selenium and its alloys from early

Jul 27, 2009· Amorphous selenium and its alloys from early xeroradiography to high resolution X‐ray image detectors and ultrasensitive imaging tubes. B. A. Weinstein, A. Reznik, Comparative study of the photodarkening relaxation-kinetics in amorphous selenium for above-bandgap and sub-bandgap illumination, Applied Physics Letters, 10.1063/1.4892836

More
[randpic]

Anomalous high-pressure behavior of amorphous selenium

Sep 09, 2008· The high-pressure behavior of amorphous selenium has been investigated with time-resolved diamond anvil cell synchrotron x-ray diffraction and computed microtomography techniques. A two-step dynamic crystallization process is observed in which the monoclinic phase crystallized from the amorphous selenium and gradually converted to the trigonal phase,

More
[randpic]

Amorphous selenium (a-Se) avalanche photodetector for

Amorphous selenium (a-Se) avalanche photodetector for applications in Positron Emission Tomography (PET) Master of Science, 2011 Oleksandr Bubon Department of Physics Lakehead University Abstract . Although avalanche amorphous selenium (a-Se) is a very promising photoconductor for a

More
[randpic]

Kinetic Processes in Amorphous Materials Revealed by

Kinetic Processes in Amorphous Materials Revealed by Thermal Analysis: Application to Glassy Selenium Jiří Málek * and Roman Svoboda Department of Physical Chemistry, Faculty of Chemical Technology, University of Pardubice, Studentská 95, 53210 Pardubice, Czech Republic * Correspondence: e-mail [email protected]; Tel.: +420-466-036-553

More
[randpic]

Kinetic Processes in Amorphous Materials Revealed by

It is expected that viscous flow is affecting the kinetic processes in a supercooled liquid, such as the structural relaxation and the crystallization kinetics. These processes significantly influence the behavior of glass being prepared by quenching. In this paper, the activation energy of viscous flow is discussed with respect to the activation energy of crystal growth and the structural

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Crystallization kinetics of a-Se

Differential scanning calorimetry was used to study crystallization behavior in selenium glass under isothermal conditions. In the current work, which is the third in a sequence of articles dealing with the crystallization kinetics of complex processes, the isothermal crystallization kinetics was described in terms of the Johnson–Mehl–Avrami nucleation-growth model.

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PRESSURE EFFECT ON POLYMORPHOUS CRYSTALLIZATION KINETICS

CiteSeerX Document Details (Isaac Councill, Lee Giles, Pradeep Teregowda): Abstract—The polymorphous crystallization kinetics of a melt-quenched amorphous selenium (a-Se) under pressure was investigated by using a piston–cylinder pressure vessel over a pressure range of 0–1.0 GPa. When increasing the applied pressure, the crystallization temperature was found

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(PDF) Crystallization kinetics of amorphous selenium

Crystallization kinetics of amorphous selenium prepared by ball milling technique: Evidence of three crystallization regimes

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Crystallization of amorphous selenium and As 0.005 Se 0

The effect of temperature on the crystallization kinetics of bulk amorphous selenium and the alloy As 0.005 Se 0.995 has been studied using differential scanning calorimetry. A time-temperature-transformation (TTT) curve has been plotted from isothermal results over the temperature range 320 to 490 K, and shows the presence of two minima for both materials.

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