Pure spin current in a robust pigment-red film

Rare-Earth vs. Heavy Metal Pigments and their Colors from First Principles

Many inorganic pigments contain heavy metals hazardous to health and environment. Much attention has been devoted to the quest for non-toxic alternatives based on rare-earth elements. The computation of colors from first principles is a challenge to electronic structure methods however, especially for materials with localized f-orbitals. Here, starting from atomic positions only, we compute the color of the red pigment cerium fluorosulfide CeSF, as well as of mercury sulfide HgS (classic "vermilion"). Our methodology employs many-body theories to compute the optical absorption, combined with a…

伊兹尼克陶瓷釉和颜料的现场拉曼光谱分析

On Site Raman Analysis of Iznik Pottery Glazes and Pigments

在法国塞夫勒的国家塞拉米克博物馆，对1480年至1620年生产的稀有伊兹尼克（前尼西亚）陶器进行了现场拉曼分析。与一系列碎片进行比较。这些陶器的生产城镇在80年代备受争议，许多问题仍然存在。釉现场分析作为一个分类/datating工具的潜力进行了评估。硅酸盐釉的结构不随样品而改变（聚合指数约0.5-0.8，表明硅酸铅组成;在约985和1030-1050 cm-1处的特征Si-O拉伸模式双峰）。相比之下，大多数“Kütahya”陶器的相应签名在~1070-1090 cm-1处达到峰值。根据较低的烧成（后）温度，测量了明亮的釉上彩红柱石的最低指数。釉中鉴定出的不同晶相有石英、赤铁矿、尖晶石、钙钛矿、钙铬榴石、石榴石和锆石。在所研究的大多数样品中，白色来自石英泥。锡石（SnO 2）乳浊剂只存在于一些早期的蓝白色陶瓷（结大师和巴巴Nakkas风格，约。1510-1530），我们没有其他证据表明它被故意用作遮光剂。有意添加氧化锡可能会使某些红色、蓝色和透明绿色的果核颜色变浅。至少有两种类型的红色釉和两种类型的含铬绿色颜料被证明。

Modelling a DR shaft operated with pure hydrogen using a physical-chemical and CFD approach

The hydrogen-based route could be a valuable way to produce steel considering its low carbon dioxide emissions. In ULCOS, it is regarded as a long-term option, largely dependent on the emergence of a hydrogen economy. To anticipate its possible development, it was decided to check the feasibility of using 100% H2 in a Direct Reduction shaft furnace and to determine the best operating conditions, through appropriate experimental and modelling work. We developed from scratch a new model, called REDUCTOR, for simulating this process and predicting its performance. This sophisticated numerical mod…