Results 51 to 60 of about 787,049 (300)

Four‐Point Bending Tests at High Temperatures on Commercial MgO‐C Refractory Bricks with and Without Recyclate Considering Different Carbon Contents

open access: yesAdvanced Engineering Materials, EarlyView.
Four‐point bending tests are conducted in an argon atmosphere on commercial MgO‐C brick grades with and without MgO‐C recyclate from room temperature up to 1300 °C. No detrimental effect of the MgO‐C recyclates on bending strength is found. Instead, a decisive influence of the total carbon content is observed, with lower total carbon contents ...
Alexander Schramm   +5 more
wiley   +1 more source

The analysis of today situation on the market of the agricultural machines

open access: yesActa Universitatis Agriculturae et Silviculturae Mendelianae Brunensis, 2007
The paper is dealing with the analysis of the market of agricultural machines in the Czech Republic. The part of the article is focused on export and import development of agricultural machines between Czech Republic, EU countries and the other countries
Šárka Stojarová, Zuzana Schwarzová
doaj   +1 more source

Role of acid mobilization in association of smaller particle size with higher iron solubility [PDF]

open access: yes, 2011
Conference abstract (August 14-19, 2011, Goldschmidt 2011 in Prague, Czech ...
ITO, Akinori, 伊藤, 彰記
core  

Investigation of Thermo‐Chemical Processes in Commercial MgO‐C Refractory Bricks With and Without MgO‐C Recyclate at Elevated Temperatures

open access: yesAdvanced Engineering Materials, EarlyView.
This study investigates thermo‐chemical processes during high‐temperature testing of two commercial MgO‐C brick grades, one containing 47.5 wt.% MgO‐C recyclate. Using ETV, DTA/TG‐MS, XRD, and SEM/EDS/EBSD, mechanisms such as carbothermal reduction of magnesia, impurity incorporation into the secondary MgO surface layer, and calcium‐rich phase ...
Alexander Schramm   +6 more
wiley   +1 more source

Characterization of a Recyclate‐Based MgO‐Steel Composite As‐Sintered Inert Anode Candidate After Exposure to Cryolite Electrolysis

open access: yesAdvanced Engineering Materials, EarlyView.
Carbon‐free inert anodes are essential for decarbonizing aluminum electrolysis. This study investigates a recyclate‐based MgO‐316L steel composite anode tested under galvanostatic Hall–Héroult conditions in cryolite at 1000°C. Microstructural analysis reveals selective MgO fluorination, spinel and oxide layer formation, electrolyte infiltration, and ...
Serhii Yaroshevskyi   +7 more
wiley   +1 more source

Stenochrus portoricensis new to the Czech Republic (Schizomida, Hubbardiidae) [PDF]

open access: yes, 2009
A schizomid, Stenochrus portoricensis Chamberlin, 1922 (family Hubbardiidae), was collected in a greenhouse in Brno.
Harvey, Mark   +2 more
core   +2 more sources

Development of Sustainable MgO–C Refractories Using MgO–C Recyclates and a Novel Eco‐Friendly Fructose–Tannin Binder Crosslinked With Citric Acid

open access: yesAdvanced Engineering Materials, EarlyView.
This study develops sustainable MgO–C refractories using recycled materials and eco‐friendly fructose–tannin binders. The enhanced performance of citric acid as a cross‐linker and functional additives on mechanical and thermomechanical properties was examined. Characterization included strength tests, immersion trials, and microstructural and inclusion
Dinesh K. Gunasekar   +7 more
wiley   +1 more source

Industrial Property and Investment in the Research in the Business Sector – Comparative Study Czech Republic and Poland [PDF]

open access: yesEastern European Journal of Regional Studies, 2021
The authors analyzed data on the topic with using descriptive statistics method for answers five research questions which are in line with the aim of the article.
Andrea TOMÁŠKOVÁ, Roman ŚMIETAŃSKI
doaj  

Impact of Pre‐Oxidation Treatments on a Recycled MgO/Steel‐Composite as Carbon Free Anode in Aluminum‐Electrolysis Environments

open access: yesAdvanced Engineering Materials, EarlyView.
Cermets (60 vol.% AISI 316L stainless steel, 40 vol.% recycled MgO), intended for use in aluminum electrolysis, were pre‐oxidized in three furnaces with different heating technologies and subjected to a cryolite corrosion test. The different atmospheres influenced the formation of oxide layers, which in turn affected corrosion resistance and ...
Patricia Kaiser   +4 more
wiley   +1 more source

A policy fiasco: The institutional (non-)reform of Czech public employment services in 2011

open access: yesCentral European Journal of Public Policy, 2015
The article deals with an institutional reform of public employment services implemented in the Czech Republic in 2011. By merging social benefits administration with employment services into the newly established Labour Office of the Czech Republic, the
Kotrusová Miriam, Výborná Klára
doaj   +1 more source

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