The effect of SiO2 additions on barium aluminate cement formation and properties

Rezaie, Mohammad Reza; Rezaie, Hamid Reza; Naghizadeh, R.

doi:10.1016/j.ceramint.2008.12.009

Cited by 11 publications

(5 citation statements)

References 23 publications

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“…, which is the result of ground samples fired at 1100°C for 3 h. Barium mono‐aluminate (BaO·Al 2 O 3 ) is prominently formed with some minor quantities of Barium hexa‐aluminate (BaO·6Al 2 O 3 ) in all milled samples. The formation of BaO·Al 2 O 3 generally occurs above 1300°C by the solid‐state reaction from commercial grade of BaCO 3 and Al 2 O 3 , but the present work succeeded in lowering this firing temperature at least 300°C. Figure shows the ground samples fired at 1200°C for 3 h. Increasing intensity peaks of BaO·6Al 2 O 3 can be seen here as when compared to Fig.…”

Section: Resultsmentioning

confidence: 68%

“…These results indicate formation of hexagonal‐celsian (BaO·Al 2 O 3 ·2SiO 2 ) and barium mono‐aluminate (BaO·Al 2 O 3 ) phases. BaO·Al 2 O 3 ·2SiO 2 phase formation as low as 1200°C indicates that high‐energy ball milling can promote the crystallization of BaO·Al 2 O 3 ·2SiO 2 at low temperature, while it generally crystallizes above 1480°C by the solid‐state reactions . Formation of hexa‐celsian can be predicted from the following reaction:

{BaCO}_{3} + {Al}_{2} {normalO}_{3} + 2 {SiO}_{2} \to BaO \cdot {Al}_{2} {normalO}_{3} \cdot 2 {SiO}_{2} + {CO}_{2} false↑

…”

Section: Resultsmentioning

confidence: 99%

“…Beyond this temperature barium aluminate cement (BAC) has proven more reliable cement for the formation of refractory concretes with better chemical and mechanical properties . BAC has higher refractoriness than CAC with similar cementing properties . Refractory castables based on BACs have high thermal shock resistance, chemical stability, fast setting, and hardening concrete, making them superior for refractory castables in the steelmaking industry …”

Section: Introductionmentioning

confidence: 99%

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Effect of High‐Energy Ball Milling and Silica Fume Addition inBaCO₃–Al₂O₃. Part I: Formation of Cementing Phases

Srivastava

Kumar

et al. 2014

J. Am. Ceram. Soc.

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The effects of high-energy ball milling and subsequent calcination on the formation of barium aluminate cementing phases using mixtures of Al 2 O 3 and BaCO 3 were investigated. Silica fume was further added in the raw mixtures to observe its role on the cementing phase formation. Results indicated that the decomposition temperature of BaCO 3 lowered remarkably with the increase in milling time. Barium aluminate cements with grain size in nanometer range were obtained from high-energy ball-milled raw mixtures. X-ray diffraction (XRD) results confirmed several crystalline barium-silicate and barium aluminate phases present. Formation of crystalline BaOÁAl 2 O 3 phase was observed between 1000°C and 1100°C in the raw mixtures, which were obtained in amorphous state after milling for 5 h. This temperature is at least 300°C lower than that used in the traditional solid-state method. Fume SiO 2 additions resulted in BaOÁAl 2 O 3 Á2SiO 2 (celsian) formation which acted as a retarder, provides more workability and mechanical strength.M. Rigaud-contributing editor Manuscript No. 34918.

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Section: Resultsmentioning

confidence: 68%

{BaCO}_{3} + {Al}_{2} {normalO}_{3} + 2 {SiO}_{2} \to BaO \cdot {Al}_{2} {normalO}_{3} \cdot 2 {SiO}_{2} + {CO}_{2} false↑

…”

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effect of High‐Energy Ball Milling and Silica Fume Addition inBaCO₃–Al₂O₃. Part I: Formation of Cementing Phases

Srivastava

Kumar

et al. 2014

J. Am. Ceram. Soc.

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“…The cement is high temperature resistant (up to 1850 °C), it has high mechanical properties, thermal and chemical stability and it can shield different types of radiation because of the barium presence. [6] Barium oxide occurs only as a part of compounds. Therefore, a barium compound should be added to raw meal to get cement with barium.…”

Section: Introductionmentioning

confidence: 99%

The Influence of Barium Compounds on the Formation of Portland Cement Clinker

Zezulová

Staněk

Opravil

2016

MSF

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Portland clinker is thanks to its large-scale production a continuously studied topic. Clinker, or Portland cement, is used for construction purposes or for insulation and special applications. One of these special applications could be shielding of different types of radiation by making use of the content of barium ions. The present article examines the influence of barium oxide on the formation and properties of Portland clinker, which could be, by incorporation of barium ions into the system, used as a binder for buildings resistant to various types of radiation. Barium sulphate and barium carbonate were added to the raw meal in order to prepare clinkers with different content of barium oxide. The effect of barium on the formation of clinker phases was studied (by XRD – Rietveld analysis and by the microscopic point counting method), as well as the rate of alite formation under isothermal conditions. Furthermore, the ability of barium to become a part of clinker minerals was studied by SEM with EDS.

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“…Therefore, A growing number of studies of improving the fiber-cementitious matrix interfacial properties have been carried out [1][2][3]. Nano-silica has been widely used in cementitious composites, which can promote hydration, shorten setting time, reduce porosity, improve microstructure and mechanical properties [4][5][6][7][8][9][10][11][12][13][14][15]. Meanwhile, the nano-silica as reinforcement of polypropylene plastic have been applied widely [15][16][17][18][19][20], generally in the polymer fibers by solution mixing [21], in-situ polymerization [22][23][24]and dispersing in extracts [25].…”

Section: Introductionmentioning

confidence: 99%

Silica Modified PP Fiber for Improving Crack-Resistance of Cementitious Composites

Yang¹,

Liu²,

Li³

et al. 2011

AMR

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To improve the interfacial bonding properties of polypropylene fiber-cement matrix, a new type of nano-silica modified polypropylene fibers was prepared by direct blend-spinning. As a comparison, Another polypropylene fiber was modified by surface chemical deposition of the silica particles by sol-gel method. The distribution of nano-particles on the fiber surface was observed with scanning electron microscope (SEM). This paper focuses on the effects on crack-resistance properties of fiber reinforced mortar(FRM) and present the mechanism of improving fiber-matrix interfacial properties, especially. The results demonstrate that the modified fiber with well-distributed of nano-silica has excellent mechanical properties, and crack resistance. The interfacial property of fiber-matrix is improved because of silica’s hydration activity. As the use of two kinds of modified fiber, the cementitious materials crack area is significantly decreased. In conclusion, the modified fiber by chemical deposition method which has slightly better overall performance.

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The effect of SiO2 additions on barium aluminate cement formation and properties

Cited by 11 publications

References 23 publications

Effect of High‐Energy Ball Milling and Silica Fume Addition inBaCO₃–Al₂O₃. Part I: Formation of Cementing Phases

Effect of High‐Energy Ball Milling and Silica Fume Addition inBaCO₃–Al₂O₃. Part I: Formation of Cementing Phases

The Influence of Barium Compounds on the Formation of Portland Cement Clinker

Silica Modified PP Fiber for Improving Crack-Resistance of Cementitious Composites

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The effect of SiO2 additions on barium aluminate cement formation and properties

Cited by 11 publications

References 23 publications

Effect of High‐Energy Ball Milling and Silica Fume Addition inBaCO3–Al2O3. Part I: Formation of Cementing Phases

Effect of High‐Energy Ball Milling and Silica Fume Addition inBaCO3–Al2O3. Part I: Formation of Cementing Phases

The Influence of Barium Compounds on the Formation of Portland Cement Clinker

Silica Modified PP Fiber for Improving Crack-Resistance of Cementitious Composites

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Product

Resources

About

Effect of High‐Energy Ball Milling and Silica Fume Addition inBaCO₃–Al₂O₃. Part I: Formation of Cementing Phases

Effect of High‐Energy Ball Milling and Silica Fume Addition inBaCO₃–Al₂O₃. Part I: Formation of Cementing Phases