The effect of K₂O on the microstructure of Na₂O-CaO-P₂O₅-SiO₂ based ceramic system

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• 作者：Rehana Zia ; Madeeha Riaz ; ^{madeehariaz2762@yahoo.com" class="auth_mail" title="E-mail the corresponding author} ; Iqra Hameed ; Ayesha Afifa
• 关键词：TGA ; Crystallization ; K2O ; Thermal stability
• 刊名：Optik - International Journal for Light and Electron Optics
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：129
• 期：Complete
• 页码：15-20
• 全文大小：2088 K

文摘

In present study ceramic based material having composition (SiO₂$O_2$-Na₂$a_2$O-CaO-K₂O$K_{2}O$-P₂O₅$P_2{O}_5$) was synthesized by solid state method. The influence of sintering temperature at 900 °C and partial substitution of Na₂O with K₂O in SiO₂-P₂O₅-Na₂O–CaO system on thermal and structural properties of system was studied by TGA-DSC, ourier transform IR, X-Ray Diffraction and Scanning electron Microscopy respectively. In all the thermally treated ceramic samples, solid solution of sodium calcium silicate Na₂Ca₃Si₆O₁₆, Combeite Na₂Ca₂Si₃O₉, Wollastonite, were known as main crystalline phases identified. The result showed that addition of K₂O stabilized the samples thermally, decreased the crystallization kinetics. The thermal stability for samples were observed in 800 °C–1000 °C region.