This work was supported by the Federal Ministry for Economic Affairs and Energy on the basis of a decision by the German Bundestag within the project “HotVeGas” (FKZ 0327773 K).Institute of Energy- and Climate Research – IEK 2, Forschungszentrum Jülich GmbH, 52428, Jülich, GermanyDepartment of Materials Engineering, KU Leuven, 3001, Leuven, BelgiumYou can also search for this author in
The experiments were performed using Pt- and Mo-crucibles. Please enable javascript and pop-ups to view all page content.Recent developments in chemistry written in language suitable for students.Each blog post includes links to relevant AUS-e-TUTE tutorials and problems to solve. This finding can be explained by the reduction of FeSince sufficient evidence has been provided for the impact of each of the experimental parameters, the influence on the crystallization characteristics is discussed in this section. Adopted or used LibreTexts for your course?

Identify each of the crucibles by means of existing visual differences. Sketch of the high temperature furnace of the CLSM setup, as seen in [The CLSM high temperature furnace, loaded with synthetic oxide powder in a Pt-crucible (left) and an annealed slag particle in a Mo-crucible (right) (Color figure online)The furnace is sealed by a quartz glass window containing flange (Fig. Do not use marking pens or pencils to mark your crucibles. The agreement here is within that which is routinely observed for two separate balances.

Heat the crucible at red heat in this manner for 5-10 minutes. If time is limited, it is possible to light the magnesium strip inside the crucible and quickly position the lid using tongs before heating the crucible. An experimental study on the crystallization characteristics of oxidic slag systems was conducted by using the CLSM setup [State of sample: heating of oxide slag powder led to heterogeneous melting, resulting in local fluctuations of the bulk slag chemistry. ISIJ Int 58(11):1972–1978Xuan W et al (2015) Influence of SiO2/Al2O3 on crystallization characteristics of synthetic coal slags. Springer-Verlag, Berlin Heidelberg, p 647Hack K, Jantzen T, Müller M, Yazhenskikh E, Wu G (2012) A novel thermodynamic database for slag systems and refractory materials. The main focus was set to the temperature range between 1100 and 1250 °C (Fig. A dry cold crucible is weighed to the nearest 0.0001 g.The crucible is then heated to incandescence for five minutes, as shown at the left. Identify each of the crucibles by means of existing visual differences. The high temperature furnace used in this study was manufactured by Lasertec (Model SVF17SP, Lasertec, Yokohama, Japan). Finally, the partial pressure of oxygen influences the crystallization tendency as well as the morphology of the crystallized phases. Investigations were conducted with a confocal laser scanning microscope (CLSM) [The synthetic oxide slag was produced using high-purity oxides (Alfa Aesar, Massachusetts, U.S. and Merck, Darmstadt, Germany). Subsequently after the procedure, the annealed slag was crushed into particles with millimeter scale that were lastly used in the CLSM experiments.Confocal laser scanning microscopy (CLSM) provides an in situ view of a sample during heat treatment. Heating it on its side is preferred because the overall strain on the ceramic material at the high temperatures used is somewhat less.The crucible ought to be heated to incandescence for 5-10 minutes (left). 10Stability of the crucible material: molybdenum, calculated with FactSage and FactPS database.

Here are some photos to prove the point.

Such a placement is not recommended Note the correct placement of the crucible in the photograph at the right.The crucible may be placed right side up, as in the left photo, or on its side, as in the right photo. J Non-Cryst Solids 436:35–43Park J, Ryu J, Sohn I (2014) In-situ crystallization of highly volatile commercial mold flux using an isolated observation system in the confocal laser scanning microscope.
Explore a character analysis of John Proctor, plot summary, and important quotes. DO NOT place anything hot directly onto the lab bench, always place hot objects on a heat resistant mat. Note: we will use the "constant mass" of the crucible + lid + magnesium oxide in the results table and disregard earlier, lighter masses which indicate that the reaction had not yet gone to completion. Wash and rinse four 10 ml crucibles and their lids. Accordingly, crystalline phases grew heterogeneously in the partial liquid slag. Preparing the crucible. Carefully note in your lab notebook what these identifying marks are and assign a number to each crucible.

Philadelphia: UPenn Museum of Archaeology, 1999. You can also search for this author in

Once the crystals formed, the slag bulk chemistry has changed and the subsequent crystallization is not representative, as also indicated by deviations towards FactSage Equilib calculation results. Corundum (AlHowever, as the Ar-atmosphere was reduced by using the Mg-furnace subsequently, HKR slag behaved differently. Figure modified after [In the CLSM experiment, the samples were investigated isothermally. Although the rim around this zone is quite hot, the gases inside are essentially at room temperature. Slag viscosity is strongly influenced by the composition of the slag and the temperature. Since the sample size is very limited, no additional XRD results could be performed. Be sure that you read the appendix section dealing with the use of desiccator.Wash and rinse four 10 ml crucibles and their lids. The Crucible is just as much about attempting to find God, as it is about establishing political order. Weigh the crucible without the lid and its contents on the analytical balance.

Crystallization tendency and the state of oxidic slags are important influencing factors for slag viscosity and therefore slag tapping. Make sure you grab the crucible on the edge as shown.

in Eastern Europe and Iran.The Roman period shows technical innovations, with crucibles for new methods used to produce new alloys. So we prepared the scale and crucible and re-weighed everything. Air contains not only oxygen gas but also a large proportion of nitrogen gas. A crucible is a heat-resistant container in which materials can be heated to very high temperatures.


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