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Characterization of cerate-zirconate ceramics powder preparedudby three different methods: a comparative study

机译:制备的铈锆陶瓷粉末的表征通过三种不同的方法:比较研究

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摘要

Ceramics powder of BaCe0.54Zr0.36Y0.1O2.95 (BCZY) was synthesized using three different methods namely sol-gel (SG), supercritical fluid (SC) and supercritical fluid assisted sol-gel (SCSG). The respective prepared samples were denoted as S1, S2 and S3. TG thermogram of the dried powders for all samples showed three stages of weight loss. Each stage was corroborated by one or two exothermic peaks as shown in DTG signal. Complete thermal decomposition for all the samples was almost accomplished at 1000°C for about 2 h. At calcination temperature of 1100°C, S1 showed a single-phase of perovskite-type oxides as proven by XRD result. Morphology of the calcined powders by SEM micrograph showed that S1 is in spherical shape, S2 is in cubic structure and S3 has a mixture of spherical and rod-like structure. Therefore, as comparison, SG method gives better characteristics of cerate-zirconate ceramics powder compared to SC and SGSC.
机译:BaCe0.54Zr0.36Y0.1O2.95(BCZY)陶瓷粉是使用三种不同的方法合成的,即溶胶-凝胶(SG),超临界流体(SC)和超临界流体辅助溶胶-凝胶(SCSG)。分别制备的样品表示为S1,S2和S3。所有样品的干粉的TG热分析图显示了三个阶段的重量损失。如DTG信号所示,每个阶段都被一个或两个放热峰所证实。所有样品的完全热分解几乎在1000°C下进行了约2小时。 XRD结果证明,在1100℃的煅烧温度下,S1表现出单相钙钛矿型氧化物。煅烧粉末的SEM照片的形态表明,S1为球形,S2为立方结构,S3为球形和棒状的混合物。因此,与之相比,与SC和SGSC相比,SG方法可提供更好的铈酸锆陶瓷粉末特性。

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