Investigation of Thermal Properties of Bi1,8-xGaxPb0,2Sr2CaCu2Oy Glass Ceramics

Abstract

In this study, the effect of Bi-Ga partial substitution at x = 0,0; 0,025; 0.1; 0,2 on the thermal properties of the Bi1,8-xGaxPb0,2Sr2CaCu2Oy structure. Experimental nucleation ratios were analyzed in terms of nucleation theory using Arvami parameters as a function of temperature and partial displacement. The activation energies of the first crystallization peak in the Bi1,8-xGaxPb0,2Sr2CaCu2Oy structure were calculated using non-isothermal Kissinger, Takhor and Augis-Bennet methods. By using the thermogravimetric analysis (TG) method, the effect of Bi-Ga partial substitution on the mass change mechanism was investigated in oxygen gas flow.

Keywords

• DTA/TG
• Glass Ceramics
• Avrami parameter
• Thermal properties

Bi1,8-xGaxPb0,2Sr2CaCu2Oy Cam Seramiklerin Termal Özelliklerinin İncelenmesi

Öz

Bu çalışmada, x = 0; 0,025; 0,1; 0,2 oranlarında Bi-Ga kısmi yer değiştirmesinin, Bi1,8-xGaxPb0,2Sr2CaCu2Oy yapısının termal özellikleri üzerindeki etkisi incelenmiştir. Deneysel çekirdeklenme oranları, sıcaklığın ve kısmi yer değişitirmenin bir fonksiyonu olarak Arvami parametreleri kullanılarak çekirdeklenme teorisi açısından analiz edilmiştir. Bi1,8-xGaxPb0,2Sr2CaCu2Oy yapısında birinci kristallenme piki için aktivasyon enerji değerleri, izotermal olmayan Kissinger, Takhor ve Augis-Bennet yöntemleri kullanılarak hesaplandı. Bi-Ga kısmi yer değiştirmesinin, kütle değişim mekanizmasındaki etkisi oksijen gazı akışında incelendi.

Anahtar Kelimeler

• DTA/TG
• cam seramik
• Avrami parametresi
• Termal özellikler

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