Thermodynamic modeling of hydrothermal synthesis of ceramic powders

Łencka, Małgorzata M.; Riman, Richard E.

doi:10.1021/cm00025a014

Cited by 343 publications

(269 citation statements)

References 8 publications

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“…However, their construction involves more complex thermodynamic calculations. Their construction and the thermodynamic fundamentals have been also well documented [108][109][110].…”

Section: Resultsmentioning

confidence: 99%

Synthesis of advanced ceramics by hydrothermal crystallization and modified related methods

Ortíz-Landeros¹,

Gómez-Yáñez²,

López-Juárez³

et al. 2012

J Adv Ceram

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Abstract:The present article aims to give a brief overview about the advantages of the hydrothermal crystallization method for the synthesis of advanced ceramics. Emphasis is given, not only on the conventional hydrothermal crystallization, but also on some of its variants; such as ultrasound-assisted, electrochemical-assisted, microwave-assisted and surfactant-assisted hydrothermal methods which open up new opportunities for the synthesis of ceramic materials with novel properties demanded for advanced applications. In the current work the synthesis of barium titanate (BaTiO 3 ), lithium metasilicate (Li 2 SiO 3 ) and sodium-potassium niobate (Na, K)NbO 3 powders are reported as cases of study.

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“…However, their construction involves more complex thermodynamic calculations. Their construction and the thermodynamic fundamentals have been also well documented [108][109][110].…”

Section: Resultsmentioning

confidence: 99%

Synthesis of advanced ceramics by hydrothermal crystallization and modified related methods

Ortíz-Landeros¹,

Gómez-Yáñez²,

López-Juárez³

et al. 2012

J Adv Ceram

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“…To minimize contamination effects during the analyses, which are generally strong for small electron probes of some nanometers, the specimen grid was kept at liquid nitrogen temperature via a cooling specimen holder (Gatan model 668). To fabricate ceramic bodies the powders were mixed with 5 wt% poly(vinyl alcohol) solution as a pressing aid for 24 h, then pressed into pellets (12 mm in diameter, 2 mm thick) of 3.1 g/cm 3 in density, and sintered in air (13508C, 14008C, 1 h annealing time). For testing the electrical resistance the sintered pellets were ®rst polished and then connected to gallium±indium eutectic to provide an ohmic contact.…”

Section: Methodsmentioning

confidence: 99%

“…At higher temperatures, solid state diffusion proceeds resulting in a series of different (Ba 1Àx Ca x )TiO 3 solid solutions with x 0.25 [15]. At 12008C, CaTiO 3 has not yet been detected (Fig. 6(a)), however, the XRD graph (Fig.…”

Section: Methodsmentioning

confidence: 99%

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Surface modification of barium titanate powder particles

Völtzke

Gablenz

Abicht

et al. 1999

Materials Chemistry and Physics

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The surfaces of n-doped barium titanate (BaTiO 3 ) powder particles were modi®ed by milling in a Ca(NO 3 ) 2 solution both at room temperature and under hydrothermal conditions before they were analyzed by electron energy loss spectroscopy and transmission electron microscopy down to the nanometer range.The room temperature treated powders showed BaTiO 3 particles covered with a CaO/BaO layer. Heating these particles caused a shell of (Ca,Ba)TiO 3 solid solution. Under hydrothermal conditions rectangular CaTiO 3 crystallites precipitated on the surface of the BaTiO 3 grains, which during heating transformed into a series of (Ba 1Àx Ca x )TiO 3 particles. These modi®cations of the shell structure change the sintering behavior and thus the microstructure as well as the electrical properties of the ®nal ceramics. Especially the room temperature resistance and the voltage withstanding of the ceramic increased compared to that of conventionally prepared materials of identical composition. # 1999 Elsevier Science S.A. All rights reserved.

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“…The fundamental basis for this software and various thermodynamic phase equilibrium models created using this software have been reported by Riman et al (Lencka and Riman, 1993;Haders et al, 2008). Parameters input for calculation of CaSiO3 carbonation were based on the composition of CaSiO3 and the amount of MEA used in our reaction system, i.e., 9.3 g of CaSiO3 in 90 g of MEA-CO2 aqueous solution.…”

Section: Thermodynamic Process Simulationmentioning

confidence: 99%

A Novel Strategy for Carbon Capture and Sequestration by rHLPD Processing

Gupta

Tang

et al. 2016

Front. Energy Res.

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Monoethanolamine (MEA) scrubbing is an energy-intensive process for carbon capture and sequestration (CCS) due to the regeneration of amine in stripping towers at high temperature (100-120°C) and the subsequent pressurization of CO2 for geological sequestration. In this paper, we introduce a novel method, reactive hydrothermal liquid phase densification (rHLPD), which is able to solidify (densify) monolithic materials without using high temperature kilns. Then, we integrate MEA-based CCS processing and mineral carbonation by using rHLPD technology. This integration is designated as rHLPD-carbon sequestration (rHLPD-CS) process. Our results show that the CO2 captured in the MEA-CO2 solution was sequestered by the mineral (wollastonite CaSiO3) carbonation at a low operating temperature (60°C) and simultaneously monolithic materials with a compressive strength of ~121 MPa were formed. This suggests that the use of rHLPD-CS technology eliminates the energy consumed for CO2-MEA stripping and CO2 compression and also sequesters CO2 to form value-added products, which have a potential to be utilized as construction and infrastructure materials. In contrast to the high energy requirements and excessive greenhouse gas emissions from conventional Portland cement manufacturing, our calculations show that the integration of rHLPD and CS technologies provides a low energy alternative to production of traditional cementitious-binding materials.

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Thermodynamic modeling of hydrothermal synthesis of ceramic powders

Cited by 343 publications

References 8 publications

Synthesis of advanced ceramics by hydrothermal crystallization and modified related methods

Synthesis of advanced ceramics by hydrothermal crystallization and modified related methods

Surface modification of barium titanate powder particles

A Novel Strategy for Carbon Capture and Sequestration by rHLPD Processing

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