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首页> 外文期刊>Crystal growth & design >Preparation and characterization of Ba8Ga16Ge30/Sr8Ga16Ge30 core-shell single crystals
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Preparation and characterization of Ba8Ga16Ge30/Sr8Ga16Ge30 core-shell single crystals

机译：Ba8Ga16Ge30 / Sr8Ga16Ge30核壳单晶的制备与表征

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摘要

Ba- and Sr-filled type I Ge clathrate single crystals were synthesized by the Ga flux method, using high purity elemental Ba, Sr, Ga, and Ge as starting materials. Scanning electron microscopy equipped with energy-dispersive X-ray spectroscopy and Raman spectroscopy were used to characterize the cross-section of a single crystal. The results indicate an inhomogeneous composition distribution of the crystal: the core of the crystal is composed of Ba8Ga16Ge30 and the shell is composed of Sr8Ga16Ge30 with a transition layer in between. This inhomogeneous composition of the crystal is confirmed by a locally resolving Seebeck coefficient measurement and thermal analysis by differential scanning calorimeter.
机译：用高通量钡，锶，镓和锗元素为原料，通过Ga助熔剂法合成了Ba和Sr填充的I型Ge笼形单晶。配备有能量色散X射线光谱和拉曼光谱的扫描电子显微镜用于表征单晶的横截面。结果表明晶体的成分分布不均匀：晶体的核由Ba8Ga16Ge30组成，壳由Sr8Ga16Ge30组成，中间有过渡层。通过局部解析塞贝克系数测量和差示扫描量热仪的热分析证实了晶体的这种不均匀组成。

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