scispace - formally typeset
Search or ask a question
Topic

Calcium oxide

About: Calcium oxide is a research topic. Over the lifetime, 7600 publications have been published within this topic receiving 66104 citations. The topic is also known as: caustic lime & quicklime.


Papers
More filters
Journal ArticleDOI
TL;DR: In this article, the main purpose of the work reported in this paper is to use kaolin to produce one part alkali-activated cement, and thermal activation was performed on kaolin in the presence of alkalis (calcium oxide, sodium silicate, and sodium carbonate). Optimization experimental investigations were undertaken with selected alkalis to maximize the mechanical properties as well as minimize the cost of the resultant alkaliactivated cement.
Abstract: The main purpose of the work reported herein is to use kaolin to produce one-part alkali-activated cement. Thermal activation was performed on kaolin in the presence of alkalis (calcium oxide, sodium silicate, and sodium carbonate). Optimization experimental investigations were undertaken with selected alkalis to maximize the mechanical properties as well as minimize the cost of the resultant alkali-activated cement. Scanning electron microscopy/energy dispersive spectroscopy (SEM/EDS), thermogravimetric analysis (TGA), and X-ray diffraction (XRD) test techniques were used to get insight into the binder chemical phases and their microstructure. The results showed that the optimal formulation for the alkali-activated kaolin cement developed consists of 62.5 wt.% kaolin, 30 wt.% calcium oxide, 5 wt.% sodium carbonate and 2.5 wt.% sodium silicate. The 7-day compressive strength at heat and room-curing temperatures reached 19.83 and 16.47 MPa, respectively. The competitive merits of the kaolin-based cement assessed against Portland cement considering the raw materials and production processing contributions to carbon footprint, cost, and energy content. The carbon footprint of the alkali-activated kaolin cement was 70% less than that of Portland cement. The cost and energy content of the alkali-activated kaolin cement was 45% and 70%, respectively, less than those of Portland cement.

31 citations

Journal ArticleDOI
TL;DR: In this paper, the authors measured the carbide capacity of the CaO-SiO2-MnO slag through the wide composition region at 1773 K to understand the effective slag composition on the solubility of carbon in molten slags during SiMn production processes.
Abstract: The carbide capacity of the CaO–SiO2–MnO slag, which is the main system produced during Mn alloys processes, through the wide composition region has been measured at 1773 K to understand the effective slag composition on the solubility of carbon in molten slags during SiMn production processes. The carbide capacity is strongly affected by slag composition and this tendency can be reasonably estimated by employing the activity of lime and the activity coefficient of CaC2 as a thermodynamic factors affecting carbide capacity. Considering the high concentration of MnO during SiMn smelting process, the lime to silica ratio of 0.8 (±0.1) is recommended in view of high ability of carbon dissolution. The carbide capacity of the CaO–SiO2–MnO slag can be expressed as a linear function of the activity of lime and the optical basicity. The carbide capacity of the CaO–SiO2–MnO slag increases more significantly than the sulfide capacity does as the basicity of the slag increases.

31 citations

Journal ArticleDOI
15 Oct 2019-Fuel
TL;DR: In this article, the effect of calcium content on catalytic activity and syngas formation in perovskite systems was investigated in steam reforming of acetic acid under steady state conditions.

30 citations

Journal ArticleDOI
01 Jan 1986-Fuel
TL;DR: In this article, a laminar flow reactor under strongly fuel-lean conditions was used to study the nature of release and capture of sulphur oxides in the presence of finely dispersed calcium oxide and explore the effectiveness of calcium exchange pretreatment for sulphur emission control in coal combustion.

30 citations

Patent
10 May 2004
TL;DR: An alkali-free aluminoborosilicate glass with a coefficient of thermal expansion α20/300 of between 28×10−6/K and 38 ×10− 6/K was proposed in this article, which is highly suitable for use as a substrate glass both in display technology and in thin-film photovoltaics.
Abstract: An alkali-free aluminoborosilicate glass having a coefficient of thermal expansion α20/300 of between 28×10−6/K and 38×10−6/K, which has the following composition (in % by weight, based on oxide): silicon dioxide (SiO2)>58-65, boric oxide (B2O3)>6-115, magnesium oxide (MgO) 4-8, barium oxide (BaO) 0- 14-25, calcium oxide (CaO) 0-8, strontium oxide (SrO) 26- 3, or aluminum oxide (Al2O3)>14-25, calcium oxide (CaO) 0- 05- 21-25, calcium oxide (CaO) 0-8, strontium oxide (SrO)>26- 3, and which is highly suitable for use as a substrate glass both in display technology and in thin-film photovoltaics

30 citations


Network Information
Related Topics (5)
Adsorption
226.4K papers, 5.9M citations
80% related
Oxide
213.4K papers, 3.6M citations
78% related
Photocatalysis
67K papers, 2.1M citations
78% related
Microstructure
148.6K papers, 2.2M citations
78% related
Carbon
129.8K papers, 2.7M citations
77% related
Performance
Metrics
No. of papers in the topic in previous years
YearPapers
2023101
2022186
2021116
2020234
2019350
2018432