Browsing Mühendislik Fakültesi by Author "Kırsever, Derya"

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Effect of Mechanical Activation on the Structural Properties of Mn-Doped Na0.5Bi0.5TiO3 Ceramics

Kırsever, Derya; Toplan, Hüseyin Özkan (POLISH ACAD SCIENCES INST PHYSICS, 2016)

Piezoelectric ceramics (Na0.5Bi0.5)TiO3 + 0.5 mol.% Mn (Mn-NBT) have been synthesized by mechanical activation of mixed oxides BiO2, Na2CO3, TiO2 and MnO for 1 h at room temperature. Non-activated and activated Mn-NBT ...
EFFECT OF MECHANICAL ACTIVATION ON THE SYNTHESIS OF A MAGNESIUM ALUMINATE SPINEL

Kırsever, Derya; Canikoğlu, Nuray; Toplan, Hüseyin Özkan (INST ZA KOVINSKE MATERIALE I IN TEHNOLOGIE, 2016)

A magnesium aluminate spinel powder (72 % Al2O3 & 28 % MgO) was prepared with mechanical activation. Samples were sintered in a temperature range of 1400-1750 degrees C. The final sintered products were characterized with ...
Effects of mechanical activation on the structure of talc

Kırsever, Derya; Toplan, Nil; Toplan, Hüseyin Özkan (KOREAN ASSOC CRYSTAL GROWTH, INC, 2015)

This paper presents the results of research on mechanical activation of raw talc in planetary mill. Raw talc was mechanically activated in a planetary mill for five different grinding times as 15 min, 30 min, 45 min, 60 ...
Electrical Properties of Lead-Free Na1/2Bi1/2TiO3 Relaxor Ferroelectric Ceramics Doped with Hafnium or Zirconium

Kırsever, Derya (WILEY, 2015)

Ferroelectric (Na1/2Bi1/2)TiO3 and its various solid solutions have been drawing special attention as a new candidate for their lead-based counterparts. In this study, therefore, hafnium- or zirconium-doped grain-oriented ...
Recycling of Secondary Aluminium Production Waste in Processing of Mullite Based Refractory Ceramics

Kırsever, Derya; N. K. Karabulut; Toplan, Nil; H. O. Toplan (POLISH ACAD SCIENCES INST PHYSICS, 2015)

This work describes the studies to reuse secondary aluminium production waste (SAPW) derived from aluminium casting processes in the fabrication of mullite-based refractory ceramics. SAPW was characterized by using particle ...
The Cordierite Formation in Mechanically Activated Talc-Kaoline-Alumina-Basalt-Quartz Ceramic System

Kırsever, Derya; N. Karakus; Canikoğlu, Nuray; Toplan, Nil; H. O. Toplan (POLISH ACAD SCIENCES INST PHYSICS, 2015)

The powder mixtures of Talc-Kaolinite-Alumina-Basalt-Quartz were mechanically activated in a planetary ball mill for 1 hour. The structural alterations and thermal behaviour of the powder mixture were examined by X-ray ...