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81. Preparation and electrical properties of wollastonite coated with antimony-doped tin oxide nanoparticles

Author:
Wang, Caili; Wang, Dong; Yang, Runquan; Wang, Huaifa
Source:
Powder technology 2019 v.342 pp. 397-403
ISSN:
0032-5910
Subject:
calcium silicate,   etc   ; Fourier transform infrared spectroscopy; X-ray diffraction; antimony; coatings; electrical properties; energy-dispersive X-ray analysis; hydrolysis; nanoparticles; pH; powders; surface area; temperature; tin dioxide; transmission electron microscopy;     Show all 15 Subjects
Abstract:
... Composite antistatic powders of wollastonite coated with antimony-doped tin oxide nanoparticles (Sb-SnO2/wollastonite, SSW) were prepared by heterogeneous nucleation method. The samples were characterized by X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, Scanning electronic microscopy (SEM), Transmission electron microscopy (TEM) and Energy-dispersive X-ray spectrometry ( ...
DOI:
10.1016/j.powtec.2018.09.092

82. Effect of alkali-enhanced biochar on silicon uptake and suppression of gray leaf spot development in perennial ryegrass

Author:
Wang, Meng; Wang, Jim J.; Tafti, Negar D.; Hollier, Clayton A.; Myers, Gerald; Wang, Xudong
Source:
Crop protection 2019
ISSN:
0261-2194
Subject:
calcium silicate,   etc   ; Lolium perenne; Magnaporthe oryzae; abiotic stress; application rate; biochar; biotic stress; calcium oxide; disease course; disease severity; fertilizers; fungi; leaf spot; phytoliths; potassium carbonate; potassium hydroxide; silicon; slags; soil amendments;     Show all 19 Subjects
Abstract:
... Silicon (Si) is known to alleviate biotic and abiotic stress, and to reduce the development of fungal diseases in a number of different pathosystems. Biochar-based Si fertilizers, especially highly efficient alkali-enhanced biochar for recycling phytolith, has been recently proposed as a stress-alleviating amendment but its evaluation on plant disease development has not been investigated. In this ...
DOI:
10.1016/j.cropro.2019.01.013

83. Influence of anti-caking agent on the water sorption isotherm and flow-ability properties of vacuum dried honey powder

Author:
Nurhadi, Bambang; Roos, Y.H.
Source:
Journal of food engineering 2017 v.210 pp. 76-82
ISSN:
0260-8774
Subject:
calcium silicate,   etc   ; crystallization; honey; sorption; sorption isotherms; stearic acid;     Show all 6 Subjects
Abstract:
... Honey powder is a hygroscopic powder due to its composition and structure. The addition of anti-caking agent was aimed to increase the stability of honey powder. The present study aimed to study the influence of anti-caking agent on the water sorption isotherm and flow-ability properties of vacuum dried honey powder. Anti-caking agents, calcium silicate and calcium stearate, were added in honey po ...
DOI:
10.1016/j.jfoodeng.2017.04.020

84. Effect of CaO/Fe2O3 on fusion behaviors of coal ash at high temperatures

Author:
Shi, Wen-Ju; Kong, Ling-Xue; Bai, Jin; Xu, Jiang; Li, Wei-Cheng; Bai, Zong-Qing; Li, Wen
Source:
Fuel processing technology 2018 v.181 pp. 18-24
ISSN:
0378-3820
Subject:
calcium silicate,   etc   ; X-ray diffraction; chemical composition; coal; ferric oxide; iron; liquids; quartz; shrinkage; slags; temperature; viscosity;     Show all 12 Subjects
Abstract:
... The ash fusibility, usually investigated and evaluated by the ash chemical composition, is widely used for guiding the coal utilization in boiler and gasifier. The ratio of basic and acidic oxides (B/A) in coal ash is the most important parameter for ash fusibility evaluation. While the coal ash has the identical B/A ratio, SiO2/Al2O3 and CaO/Fe2O3 ratio also show significant influence on the ash ...
DOI:
10.1016/j.fuproc.2018.09.007

85. Sugarcane yield response to calcium silicate on Florida mineral soils

Author:
McCray, J. Mabry; Ji, Shangning
Source:
Journal of plant nutrition 2018 v.41 no.19 pp. 2413-2424
ISSN:
1532-4087
Subject:
calcium silicate,   etc   ; Entisols; Saccharum; Spodosols; application rate; biomass; crop yield; mineral soils; nonlinear models; silicon; soil amendments; sucrose; sugarcane; Florida;     Show all 14 Subjects
Abstract:
... Silicon (Si) is a beneficial nutrient for sugarcane (Saccharum spp.) and yield responses to Si amendment have been determined on soils with low soluble Si. Because a soil test Si calibration has not been published for sugarcane grown on Florida mineral soils, the objectives were to determine sugarcane yield response to silicon soil amendment on two mineral soils (Entisol and Spodosol) and to relat ...
DOI:
10.1080/01904167.2018.1510520

86. Uptake of actinides by calcium silicate hydrate (C-S-H) phases

Author:
Häußler, Verena; Amayri, Samer; Beck, Aaron; Platte, Tim; Stern, Tobias A.; Vitova, Tonya; Reich, Tobias
Source:
Applied geochemistry 2018 v.98 pp. 426-434
ISSN:
0883-2927
Subject:
calcium silicate,   etc   ; X-ray absorption spectroscopy; X-ray photoelectron spectroscopy; calcium; cement; geochemistry; oxidation; pH; sorption; thorium; uranium;     Show all 11 Subjects
Abstract:
... The sorption of actinides (Th, U – Am) was studied in dependence of the solid-to-liquid (S/L) ratio (0.5–20.0 g/L) and the calcium-to-silicon (C:S) ratio. The C:S ratio was varied between 1.80 and 0.70 to simulate the changing composition of the C-S-H phases during cement degradation from high to low C:S ratios. The decrease of the calcium content in the C-S-H phases by time is accompanied by a de ...
DOI:
10.1016/j.apgeochem.2018.08.021

87. Study of phosphogypsum transformation into calcium silicate and sodium sulfate and their physicochemical characterization

Author:
Zemni, Safa; Hajji, Mounir; Triki, Mohamed; M'nif, Adel; Hamzaoui, Ahmed Hichem
Source:
Journal of cleaner production 2018 v.198 pp. 874-881
ISSN:
0959-6526
Subject:
calcium silicate,   etc   ; ambient temperature; environmental impact; evaporation; liquids; mixing; phosphogypsum; physicochemical properties; quartz; slurries; sodium silicate; sodium sulfate;     Show all 12 Subjects
Abstract:
... The valorization of phosphogypsum (PG) is an efficient way to minimize its negative environmental impacts. This work is built on the use of PG as an environmental-friendly source for the production of sodium sulfate and calcium silicate. The reaction of PG transformation is carried out at room temperature using sodium silicate prepared from Tunisian silica sand. The results show that the highest r ...
DOI:
10.1016/j.jclepro.2018.07.099

88. Size- and Shape-Controlled Synthesis of Calcium Silicate Particles Enables Self-Assembly and Enhanced Mechanical and Durability Properties

Author:
Shahsavari, Rouzbeh; Hwang, Sung Hoon
Source:
Langmuir 2018 v.34 no.40 pp. 12154-12166
ISSN:
1520-5827
Subject:
calcium silicate,   etc   ; bones; calcium; concrete; drugs; durability; ecological footprint; industry; physicochemical properties; protocols; silicon; surfactants; synthetic products; tissue engineering;     Show all 14 Subjects
Abstract:
... Calcium silicate (CS)-based materials are ubiquitous in diverse industries ranging from cementitious materials to bone tissue engineering and drug delivery. As a symbolic example, concrete is the most widely used synthetic material on the planet. This large consumption entails significant negative environmental footprint, which calls for innovative strategies to develop greener concrete with impro ...
DOI:
10.1021/acs.langmuir.8b00917

89. Understanding of the Elastic Constants, Energetics, and Bonding in Dicalcium Silicate Using First-Principles Calculations C

Author:
Saravana Karthikeyan, S. K. S.; Santhoshkumar, P.; Joe, Youn Cheol; Kang, Suk Hyun; Jo, Yong Nam; Kang, Hyeong Seop; Lee, Chang Woo
Source:
Journal of physical chemistry 2018 v.122 no.42 pp. 24235-24245
ISSN:
1932-7455
Subject:
calcium silicate,   etc   ; Gibbs free energy; density functional theory; enthalpy; entropy; models; physical chemistry; specific heat; thermal conductivity;     Show all 9 Subjects
Abstract:
... Atomistic scale modeling plays an increasingly important role in understanding the structural features and the structure–property relationships of materials. Herein, we systematically investigate the elastic constant, thermal conductivity, phonon dispersion, Raman signature, optical constant, and electronic band structure of dicalcium silicate (β-Ca₂SiO₄ or C2S) performed with the norm-conserving ...
DOI:
10.1021/acs.jpcc.8b06630

90. Probing Hydrogen-Bonding Interactions of Water Molecules Adsorbed on Silica, Sodium Calcium Silicate, and Calcium Aluminosilicate Glasses C

Author:
Sheth, Nisha; Ngo, Dien; Banerjee, Joy; Zhou, Yuxing; Pantano, Carlo G.; Kim, Seong H.
Source:
Journal of physical chemistry 2018 v.122 no.31 pp. 17792-17801
ISSN:
1932-7455
Subject:
calcium silicate,   etc   ; X-ray photoelectron spectroscopy; air; ambient temperature; cleaning; glass; hydrogen bonding; infrared spectroscopy; pH; quartz; relative humidity;     Show all 11 Subjects
Abstract:
... Vibrational sum frequency generation (SFG) spectroscopy was used to study how hydrogen bonding interactions of physisorbed water layers vary with the glass composition and surface condition. Three different glass materials were used: amorphous silica (fused quartz), sodium calcium silicate (also called soda lime silica), and calcium aluminosilicate (boron-/fluorine-free E-glass). Two different sur ...
DOI:
10.1021/acs.jpcc.8b04233

91. Sources of silicon influence photosystem and redox homeostasis-related proteins during the axillary shoot multiplication of Dianthus caryophyllus

Author:
Manivannan, A.; Soundararajan, P.; Cho, Y. S.; Park, J. E.; Jeong, B. R.
Source:
Plant biosystems 2018 v.152 no.4 pp. 704-710
ISSN:
1724-5575
Subject:
calcium silicate,   etc   ; Dianthus caryophyllus; antioxidant activity; benzyladenine; enzyme activity; explants; indole acetic acid; photosynthesis; proteins; shoots; silicon;     Show all 11 Subjects
Abstract:
... The present endeavor has demonstrated the impacts of different sources of silicon (Si) such as potassium silicate (K₂SiO₃) and calcium silicate (CaSiO₃) during the in vitro axillary shoot multiplication of carnation. For the Si treatments, nodal explants were cultured onto the Murashige and Skoog’s medium fortified with 1.0 mg L⁻¹ of 6-benzyladenine and 0.5 mg L⁻¹ indole-3-acetic acid with or with ...
DOI:
10.1080/11263504.2017.1320312

92. Examination of alkali-activated material nanostructure during thermal treatment

Author:
Walkley, Brant; Kashani, Alireza; Sani, Marc-Antoine; Ngo, TuanD.; Mendis, Priyan
Source:
Journal of materials science 2018 v.53 no.13 pp. 9486-9503
ISSN:
0022-2461
Subject:
calcium silicate,   etc   ; aluminum; construction materials; crosslinking; crystallization; durability; fire resistance; fly ash; gels; heat treatment; nanomaterials; slags; temperature; water content;     Show all 14 Subjects
Abstract:
... The key nanostructural changes occurring in a series of alkali-activated materials (AAM) based on blends of slag and fly ash precursors during exposure to temperatures up to 1000 °C are investigated. The main reaction product in each AAM is a crosslinked sodium- and aluminium-substituted calcium silicate hydrate (C-(N)-A-S-H)-type gel. Increased alkali content promotes the formation of an addition ...
DOI:
10.1007/s10853-018-2270-z

93. Ash fusion characteristics during co-gasification of biomass and petroleum coke

Author:
Xiong, Qing-an; Li, Jiazhou; Guo, Shuai; Li, Guang; Zhao, Jiantao; Fang, Yitian
Source:
Bioresource technology 2018 v.257 pp. 1-6
ISSN:
0960-8524
Subject:
calcium silicate,   etc   ; X-ray diffraction; biomass; calcium; corn stover; gasification; melting point; mixing; petroleum; sawdust; scanning electron microscopy; temperature; vanadium;     Show all 13 Subjects
Abstract:
... In this study, the effect of biomass ash on petroleum coke ash fusibility was investigated at a reducing atmosphere. Some analytical methods, such as ash fusion temperatures (AFTs) analysis, X-ray diffraction (XRD), FactSage and scanning electron microscopy (SEM), were applied to determine the characteristics of ash fusion and transformation of mineral matters. The results indicated that AFTs were ...
DOI:
10.1016/j.biortech.2018.02.037

94. Catalytic transesterification to biodiesel at room temperature over several solid bases

Author:
Yang, Xing-Xia; Wang, Yi-Tong; Yang, Ya-Ting; Feng, Er-Zhong; Luo, Jia; Zhang, Fan; Yang, Wen-Jing; Bao, Gui-Rong
Source:
Energy conversion and management 2018 v.164 pp. 112-121
ISSN:
0196-8904
Subject:
calcium silicate,   etc   ; activation energy; ambient temperature; biodiesel; catalysts; catalytic activity; commercialization; fuel production; methanol; oils; oxides; transesterification;     Show all 12 Subjects
Abstract:
... The transesterification activity of several solid base catalysts in biodiesel production was systematically studied and evaluated at room temperature. Commercialized calcined silicates showed stronger transesterification ability than other commonly-used oxides, and provided considerable biodiesel yields. Biodiesel yield of >96% was obtained for Na2SiO3 catalyst (calcined at 400 °C) at 28 °C within ...
DOI:
10.1016/j.enconman.2018.02.085

95. Demonstration of Polymorphic Spacing Strategy against Sintering: Synthesis of Stabilized Calcium Looping Absorbents for High-Temperature CO2 Sorption

Author:
Zhao, Ming; Song, Yinqiang; Ji, Guozhao; Zhao, Xiao
Source:
Energy & fuels 2018 v.32 no.4 pp. 5443-5452
ISSN:
1520-5029
Subject:
calcium silicate,   etc   ; absorbents; calcium; calcium oxide; carbon dioxide; crystallites; freeze drying; fuels; silica; silicon; sorption; temperature; transmission electron microscopy;     Show all 13 Subjects
Abstract:
... To decrease the sintering deterioration of CaO sorbents in multiple CO₂ capture and release cycles, we synthesized a series of stabilized CaO sorbents incorporated with silica through freeze-drying and heat-drying, the latter of which was referred to as benchmark. The ratio of Ca and Si precursors was varied to control the reactive loadings of CaO (from 70 to 100 wt %) and the fraction of spacers ...
DOI:
10.1021/acs.energyfuels.8b00648

96. Tracing Polymerization in Calcium Silicate Hydrates Using Si Isotopic Fractionation C

Author:
Dupuis, Romain; Dolado, Jorge S.; Surga, Jose; Ayuela, Andrés
Source:
Journal of physical chemistry 2018 v.122 no.15 pp. 8356-8363
ISSN:
1932-7455
Subject:
calcium silicate,   etc   ; calcium; cations; cement; chemical bonding; durability; environmental impact; gels; isotope fractionation; isotopes; leaching; minerals; polymerization; silicon;     Show all 14 Subjects
Abstract:
... Silicate-chains polymerization is a crucial process in calcium silicate hydrate minerals, with large relevance for improving the durability and reducing the environmental impact of cement-based materials. To better understand the evolutionary mechanisms underlying the polymerization of silicate-chains in layered calcium silicate hydrates, we herein propose to trace the evolution of the polymerizat ...
DOI:
10.1021/acs.jpcc.8b00307

97. Experimental study on selection of early-strength agent for low-strength cementitious materials prepared with manganese tailings

Author:
Wang, Huaqing; Zhang, Shuguang; Wu, Beining
Source:
Environmental earth sciences 2018 v.77 no.6 pp. 231
ISSN:
1866-6280
Subject:
calcium silicate,   etc   ; X-ray diffraction; compression strength; ferric chloride; lithium; manganese; mine tailings; mixing; porosity; scanning electron microscopy;     Show all 10 Subjects
Abstract:
... The early-strength characteristics and mechanism of eight kinds of early-strength agents in low-strength cementitious materials prepared with manganese tailings were studied, and then the optimum mixing amount was obtained by means of progressing and superimposing optimization. The phase composition and morphology of hydration products were characterized through X-ray diffraction and scanning elec ...
DOI:
10.1007/s12665-018-7415-5

98. Magnesium and calcium silicate hydrates, Part II: Mg-exchange at the interface “low-pH” cement and magnesium environment studied in a C-S-H and M-S-H model system

Author:
Bernard, Ellina; Dauzères, Alexandre; Lothenbach, Barbara
Source:
Applied geochemistry 2018 v.89 pp. 210-218
ISSN:
0883-2927
Subject:
calcium silicate,   etc   ; calcium; cement; electron microscopy; encapsulation; geochemistry; heat; magnesium; magnesium silicates; models; pH; radioactive waste; rocks; shrinkage; silicon;     Show all 15 Subjects
Abstract:
... “Low-pH” cementitious materials have been developed in the context of nuclear wastes encapsulation to reduce the alkaline plume and the early hydration heat causing shrinkage of the Portland cement based-materials in contact with clayey rocks. This study follows the evolutions at an interface between calcium silicate hydrate (C-S-H) with a Ca/Si ratio of 0.8 and magnesium silicate hydrate (M-S-H) ...
DOI:
10.1016/j.apgeochem.2017.12.006

99. Direct Transmission Electron Microscopy Visualization of the Cement Reaction by Colloidal Aggregation of Fumed Silica

Author:
Satoh, Hisao; Kimura, Yuki; Furukawa, Erika
Source:
Industrial & engineering chemistry process design and development 2018 v.57 no.1 pp. 79-83
ISSN:
1520-5045
Subject:
calcium silicate,   etc   ; buildings; calcium; calcium oxide; cement; concrete; porosity; process design; silica; solidification; strength (mechanics); transmission electron microscopy;     Show all 12 Subjects
Abstract:
... Unlike other solidified materials, concrete has an internal structure that contains small pores that vary in size from several nanometers to the submicrometer range. These pores govern the strength of the material and hence the lifetime of concrete buildings. The size of the pores is governed by the presence of calcium silicate hydrate (CaO·2SiO₂·4H₂O, C–S–H). To identify how the pore size is dete ...
DOI:
10.1021/acs.iecr.7b04137

100. Intrinsic Size Effect in Scaffolded Porous Calcium Silicate Particles and Mechanical Behavior of Their Self-Assembled Ensembles

Author:
Hwang, Sung Hoon; Shahsavari, Rouzbeh
Source:
ACS applied materials & interfaces 2018 v.10 no.1 pp. 890-899
ISSN:
1944-8252
Subject:
calcium silicate,   etc   ; bones; catalytic activity; crystals; drugs; mechanical properties; models; modulus of elasticity; particle size; photons; porosity;     Show all 11 Subjects
Abstract:
... Scaffolded porous submicron particles with well-defined diameter, shape, and pore size have profound impacts on drug delivery, bone-tissue replacement, catalysis, sensors, photonic crystals, and self-healing materials. However, understanding the interplay between pore size, particle size, and mechanical properties of such ultrafine particles, especially at the level of individual particles and the ...
DOI:
10.1021/acsami.7b15803