Nihat TUĞLUOĞLU, Haluk KORALAY, Şükrü ÇAVDAR, Gökhan KILIÇ

Farklı Oranlarda PbO ve Se Katkısının Bi2Sr2Ca1Cu2Ox (BSCCO) Cam Seramik Sistemindeki Isıl Özelliklerine Etkisi

Bu çalışmada Bi2Sr2Ca1Cu2Ox (BSCCO) sistemine farklı oranlarda PbO ve Se katkılanması sonucu ısıl özelliklerinin nasıl değiştiği araştırılmıştır. Numunelerin ısıl özellikleri Diferansiyel Termal Analiz (DTA) cihazı kullanılarak belirlenmiştir. DTA ölçümlerine göre cam geçiş sıcaklığı (Tg), 733-749 K, kristalleşme pikinin başlangıç sıcaklığı (Tc), 739-759 K, kristalleşme pikinin tepe noktasının sıcaklığı (Tx), 746-766 K aralığında bulunmuştur. Aktivasyon enerjisi değerleri Kissenger, Takhor ve Augis-Bennett metotları ile hesaplanmıştır. Sonuçta aktivasyon enerji değerlerinin PS05 numunesi dışında, katkı miktarının artışıyla beraber arttığı belirlenmiştir. Ayrıca ısıl kararlılık parametresi değerleri Mahadevan eşitliği kullanılarak hesaplanmış ve PS01 numunesi en kararlı numune olarak bulunmuştur

The Effect of PbO and Se in Different Ratios on Thermal Properties of Bi2Sr2Ca1Cu2Ox BSCCO Glass Ceramic System

In this study, thermal properties of Bi2Sr2Ca1Cu2Ox (BSCCO) doped PbO and Se in different ratios has been investigated. The glass transition temperature (Tg), the temperature of crystallization initiation (Tc) and the peak temperature of crystallization peak (Tx) values according to DTA measurements were obtained as 733-749 K, 739-759 K and 746-766 K, respectively. The thermal properties of the samples were determined by Differential Thermal Analysis (DTA). The activation energy values were estimated by using the Kissenger, Takhor, and Augis-Bennett methods, and found to increase with the increasing the amount of incorporation, except PS05 sample. In addition, the thermal stability parameters were calculated by using Mahadevan equality. The PS01 sample is found to be the most stable sample according to the calculations

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