Oriented surface nucleation and crystal growth in a 18BaO·22CaO·60SiO2 mol% glass used for SOFC seals
Oriented surface nucleation and crystal growth in a 18BaO·22CaO·60SiO2 mol% glass used for SOFC seals
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取向%20表面%20成核%20和%20晶体%20生长%20in%20a%2018BaO·22CaO·60SiO2%20mol%%20玻璃%20used%20for%20SOFC%20密封
DOI：
10.1039/c7ce02008b
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发表时间：
2018
期刊：
影响因子：
3.1
通讯作者：
C. Rüssel
中科院分区：
文献类型：
--
作者：
W. Wisniewski;C. Thieme;R. Müller;S. Reinsch;S.-M. Groß-Barsnick;C. Rüssel
将工业规模生产的成分为37BaO·16CaO·47SiO2 wt%的玻璃在970°C下结晶15分钟至2小时。使用扫描电子显微镜（SEM），包括能量色散x射线能谱（EDXS）和电子背散射衍射（EBSD）以及Θ-2Θ装置中的x射线衍射（XRD），分析了直接表面的结晶以及晶体进入体的生长。直接表面显示出硅灰石的定向成核，以及硅灰石和组成物BaCaSi3O8的未知相的形成。这三个阶段也会生长到块状中，其中，由于缺乏块状成核，walstromite最终在动力学选择中占主导地位，并在整个块状中生长。石菖蒲在生长过程中表现出系统的取向变化和结对。对从各种结晶样品中获得的XRD模式进行的批判性分析表明，它们的评估存在问题，并且在该系统中通过XRD检测到的相应该通过另一种方法（如EDXS）进行验证。
A glass of the composition 37BaO·16CaO·47SiO2 wt% produced on an industrial scale is crystallized at 970 °C for times ranging from 15 min to 2 h. The crystallization at the immediate surface as well as the crystal growth into the bulk are analyzed using scanning electron microscopy (SEM) including energy dispersive X-ray spectroscopy (EDXS) and electron backscatter diffraction (EBSD) as well as X-ray diffraction in the Θ–2Θ setup (XRD). The immediate surface shows the oriented nucleation of walstromite as well as the formation of wollastonite and an unknown phase of the composition BaCaSi3O8. All three phases also grow into the bulk where walstromite ultimately dominates the kinetic selection and grows throughout the bulk due to a lack of bulk nucleation. Walstromite shows systematic orientation changes as well as twinning during growth. A critical analysis of the XRD-patterns acquired from various crystallized samples indicates that their evaluation is problematic and that phases detected by XRD in this system should be verified by another method such as EDXS.
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影响因子：
--
作者：
W. Wisniewski;C. Rüssel
通讯作者：
C. Rüssel
影响因子：
4.6
作者：
Wisniewski W;Seidel S;Patzig C;Rüssel C
通讯作者：
Rüssel C
多分散钠钙硅玻璃珠的等温烧结与同步结晶
影响因子：
3.5
作者：
M. Prado;C. Fredericci;Edgar Dutra Zanotto
通讯作者：
Edgar Dutra Zanotto
影响因子：
4.6
作者：
Wisniewski W;Patschger M;Murdzheva S;Thieme C;Rüssel C
通讯作者：
Rüssel C
DOI：
10.1016/j.jpowsour.2011.04.035
发表时间：
2011-09
期刊：
The Lancet
影响因子：
--
作者：
Marita Kerstan;C. Rüssel
通讯作者：
Marita Kerstan;C. Rüssel