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Browsing Metalurji ve Malzeme Mühendisliği / Metallurgy and Materials Engineering by Author

Browsing Metalurji ve Malzeme Mühendisliği / Metallurgy and Materials Engineering by Author "Yıldız, Kenan"

Now showing items 1-20 of 23

Dehydroxylation of high-energy ball-milled diasporic bauxite

Volkan Murat Yilmaz; Tunç Parlak, Tuğba; Yıldız, Kenan (SPRINGER, 2018)

In this study, diasporic bauxite was mechanically activated for different durations (15, 30, 60, 90 and 120 min) by the planetary mono mill. The speed of the main disk and ball-to-mass ratio were kept constant at 600 rev ...
Dehydroxylation of high-energy ball-milled diasporic bauxite

Volkan Murat Yilmaz; Tunç Parlak, Tuğba; Yıldız, Kenan (SPRINGER, 2018)

In this study, diasporic bauxite was mechanically activated for different durations (15, 30, 60, 90 and 120 min) by the planetary mono mill. The speed of the main disk and ball-to-mass ratio were kept constant at 600 rev ...
Densification and grain growth of SiO2 -doped ZnO

Canikoğlu, Nuray; Toplan, Nil; Yıldız, Kenan; Toplan, Hüseyin Özkan (2006)
Densification and grain growth of SiO2-doped ZnO

Toplan, Nil; Yıldız, Kenan; Toplan, Hüseyin Özkan (ELSEVIER SCI LTD, 2006)

The grain growth kinetics in the 1, 2, 3 and 4 wt.% SiO2 doped ZnO Was Studied Using the simplified phenomenological grain growth kinetics equation G(n) - G(n)(o) = K(o)texp(-Q/RT) together with microstructure properties ...
Densification and grain,growth of TiO2-doped ZnO

Yıldız, Kenan; Toplan, Nil; Toplan, Hüseyin Özkan; Canikoğlu, Nuray (DE GRUYTER POLAND SP ZOO, 2007)

The kinetics of grain growth in 1-4 wt. % TiO2-doped ZnO was studied using the simplified phenomenological grain growth kinetics equation together with examination of microstructure and densification of the sintered samples. ...
Direct alkaline leaching of mechanically activated diasporic bauxite

Yıldız, Kenan; Alp, Ahmet (SOC MINING METALLURGY EXPLORATION INC, 2009)

Diasporic bauxite from the Mugla-Milas region was mechanically activated in a planetary mill for different activation times and the structural changes were examined by X-ray diffraction analysis (XRD), scanning electron ...
EFFECT OF ACID CONCENTRATION ON THE EXTRACTION OF NICKEL FROM LATERITE

Tunç Parlak, Tuğba; Yıldız, Kenan (TANGER LTD, 2016)

Nickel is essential metal due to usage area as stainless steel, non-ferrous alloy production, electroplating and chemical industry. Degradation of nickel sulphides leads to extraction of nickel from laterites. High cost ...
Effect of mechanical activation on carbothermal reduction of chromite with graphite

Atasoy, Ahmet; Yıldız, Kenan (MANEY PUBLISHING, 2011)

The carbothermal reduction of mechanically activated chromite with graphite under an argon atmosphere was investigated at temperatures between 1100 and 1400 degrees C and the effects of the mechanical activation on chromite ...
Effect of Silybum marianum on acute hepatic damage caused by carbon tetrachloride in rats

Öztürk, Mahpeyker; Akdoğan, Mehmet; I. Keskin; A. N. Kisioglu; S. Oztas; Yıldız, Kenan (SCIENTIFIC PUBLISHERS INDIA, 2012)

The study was designed to test the efficiency of of Silybum marianum in different doses to treat carbon tetrachloride (CCl4) induced liver damage. Thirty-five Wistar albino rats were divided randomly into five groups as ...
Effect of Sodium Sulfate Addition on the Production of Ferronickel from Lateritic Ore

Tunç Parlak, Tuğba; Yıldız, Kenan (POLISH ACAD SCIENCES INST PHYSICS, 2016)

Lateritic nickel ore from Manisa - Caldag region was roasted to form ferronickel at 1200 degrees C for 1 h with additions of metallurgical coke and sodium sulfate varying by weight 5-15% and 0-20%, respectively. Formed ...
Effects of mechanical activation on alumina extraction from alunite ore and its thermal behaviour

Yarkadaş, Güven; Yıldız, Kenan (Taylor and Francis, 2008)

The decomposition and acid leaching has been investigated of alunite ore activated mechanically by grinding in a planetary ball mill in air atmosphere for 0, 15, 45 and 90 min. The mechanical activation appears to decrease ...
Effects of mechanical activation on the non-isothermal kinetics of mullite formation from kaolinite

Toplan, Nil; Yıldız, Kenan; Toplan, Hüseyin Özkan (SPRINGER, 2011)

The non-isothermal kinetics of mullite formation from both non-activated and mechanically activated kaolinite have been studied by differential thermal analysis (DTA). Kaolinite was mechanically activated in a planetary ...
EFFECTS OF MECHANICAL ACTIVATION ON THE SODA ROASTING OF CHROMITE

Yıldız, Kenan; Yarkadaş, Güven (TAYLOR & FRANCIS LTD, 2009)

The effects of mechanical activation on the soda roasting of chromite were investigated in this study. Structural changes in mechanically activated chromite were examined using X-ray diffraction analysis (XRD), surface ...
Effects of Sulfation Roasting and Sodium Sulfate Addition on Dissolution of Nickel and Cobalt from Laterite

Tunç Parlak, Tuğba; Yıldız, Kenan (POLISH ACAD SCIENCES INST PHYSICS, 2017)

In this study, lateritic nickel ore from Manisa-Caldag, Turkey was subjected to sulfation roasting. Experimental parameters were as follows, acid concentration (10-90 wt.%), roasting temperature (200-900 degrees C) and ...
Formation of SrTiO3 in mechanically activated SrCO3-TiO2 system

Tunç Parlak, Tuğba; Fatih Apaydin; Yıldız, Kenan (SPRINGER, 2017)

In this study, mechanical activation process was used for intimate mixing as well as producing finely ground particles, increased surface area and improved chemical reactivity of milled materials for producing SrTiO3 from ...
Investigation of efficient conditions for chromate production from chromite concentrate by alkali fusion

Yıldız, Kenan; Şengil, İsmail Ayhan (WILEY, 2004)

The alkali-fusion method was carried out by reacting chromite concentrate with molten sodium hydroxide under oxidizing conditions to form sodium chromate. The fusion product was leached with methanol to remove the unreacted ...
Low temperature formation of barium titanate in solid state reaction by mechanical activation of BaCO3 and TiO2

Fatih Apaydin; Tunç Parlak, Tuğba; Yıldız, Kenan (IOP PUBLISHING LTD, 2019)

In this study, the effects of mechanical activation on BaTiO3 formation from BaCO3 and TiO2 powders were investigated. Differential thermal analysis (DTA), high-temperature x-ray diffraction (XRD), and Fourier transform ...
Production of Sinterable Si3N4 from SiO2-Li2O-Y2O3 Mixture

Canikoğlu, Nuray; Yıldız, Kenan; Toplan, Hüseyin Özkan; Kurt, Ali Osman (TAYLOR & FRANCIS INC, 2012)

In this study, fine grained SiO2 was exposed to CRN, and then Si3N4 ceramic powders were produced. Initially, 5wt% Li2O-5 wt% Y2O3 (based on the final product) and carbon black were added to SiO2, and then powder samples ...
Structural Alterations in Smithsonite during High-Energy Ball Milling

Tunç Parlak, Tuğba; V. M. Yilmaz; Yıldız, Kenan (POLISH ACAD SCIENCES INST PHYSICS, 2017)

Smithsonite, ZnCO3, from Zamanti-Kayseri, Turkey, was subjected to high-energy milling. X-ray diffraction analysis was performed to study amorphisation in the structure and the alterations of bands in the structure were ...
The decomposition kinetics of mechanically activated alunite ore in air atmosphere by thermogravimetry

Yıldız, Kenan (ELSEVIER SCIENCE BV, 2006)

The thermal decompositions of both non-activated and mechanically activated alunite ore have been studied by thermogravimetry (TG). The ore was activated mechanically in an attritor for 15 min and amorphisation in the ...