The development of monodispersed alumino-chromate spinel nanoparticles in doped cordierite glass, studied by in situ X-ray small and wide angle scattering, and chromium X-ray spectroscopy

Bras, Wim; Greaves, G. Neville; Oversluizen, M.; Clark, S. M.; Eeckhaut, G.

doi:10.1016/j.jnoncrysol.2005.06.006

Cited by 27 publications

(37 citation statements)

References 30 publications

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“…The sample preparation method is extensively described in earlier work 4 . After the material was molten and homogenized it was rapidly quenched to room temperature in order to avoid crystallization.…”

Section: Methodsmentioning

confidence: 99%

“…This method has empirically been developed by manufacturers but the exact mechanism of the crystallization kinetics is still not completely understood 1,2 . It is well established that this is a method by which relatively monodisperse crystalline particles in an amorphous matrix can be manufactured [4][5][6] . The amount of dopant will influence the final crystallinity degree.…”

Section: Introductionmentioning

confidence: 99%

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Nanocrystal Growth in Cordierite Glass Ceramics Studied with X-ray Scattering

Bras

Clark

Greaves

et al. 2009

Crystal Growth & Design

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The development of mono-disperse crystalline particles in cordierite glass doped with Cr 3+ after a two step heat treatment is elucidated by a combination of time-resolved SAXS/WAXS experiments andwith electron microscopy. The effects of bulk and surface crystallization can clearly be distinguished and the crystallization kinetics of the bulk phase is characterized. The internal pressure due to structural differences between the crystalline and amorphous phase is measured but the physical cause of this 3 pressure can not unambiguously be attributed. The combined measurements comprise a nearly full characterization of the crystallization processes and the resulting sample morphology.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Nanocrystal Growth in Cordierite Glass Ceramics Studied with X-ray Scattering

Bras

Clark

Greaves

et al. 2009

Crystal Growth & Design

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“…The intensity at q = 0, I(0), is also related to the volume fraction of t5e particles within the sample. Complementary to this, in the high q region (Porod regime) information about the interfaces present in the sample is contained and here the scattered intensity is expressed as (see for example Bras et al, 2005):…”

Section: Basic Conceptsmentioning

confidence: 99%

“…In the last example the high temperature nucleation, growth and crystallization (devitrification) of cordierite glass is discussed (Bras et al, 2005). Cordierite glass ceramics have many special characteristics (e.g., low thermal expansion, high chemical resistance), which makes them desirable as specialized materials for example in exhaust catalysts or tunable laser.…”

Section: Examples Of Nucleation and Growth Saxs/waxs Analysismentioning

confidence: 99%

“…Cordierite glass ceramics have many special characteristics (e.g., low thermal expansion, high chemical resistance), which makes them desirable as specialized materials for example in exhaust catalysts or tunable laser. Bras et al (2005) followed the devitrification process via a combination of in situ SAXS, WAXS and ex situ EX-AFS (see next section) measurements. Their time resolved SAXS and WAXS results (Fig.…”

Section: Examples Of Nucleation and Growth Saxs/waxs Analysismentioning

confidence: 99%

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Nucleation, Growth, and Aggregation of Mineral Phases: Mechanisms and Kinetic Controls

Benning

Waychunas

2008

Kinetics of Water-Rock Interaction

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The formation of any phase, whether natural or synthetic (Fig. 7.1), is usually a disequilibrium process that follows a series of steps until a thermodynamically stable state (equilibrium) is achieved. The first step in the process of creating a new solid phase from a supersaturated solution (either aqueous or solid) is called nucleation. A particle formed by the event of nucleation usually has a poorly ordered and often highly hydrated structure. This particle is metastable with respect to ordering into a well-defined phase, which can accompany growth of the particle. This process of initiation of a new phase is defined as a first order transition and can follow various pathways involving a host of mechanisms. One of these pathways occurs when individual nuclei coalesce into larger clusters, a process defined as aggregation, which itself can follow a series of different pathways. The new phase is thermodynamically defined when the growing nucleus or aggregate has distinct properties relative to its host matrix; for example, a well-defined crystal structure, composition and/or density. These processes depend on a plethora of chemical and physical parameters that control and strongly affect the formation of new nuclei, the growth of a new crystal, or the aggregation behavior of clusters, and it is these issues that will be the focus of this chapter. We will discuss the mechanisms and rates of each process as well as the methods of quantification or modeling from the point of view of existing theoretical understanding. Each step will be illustrated with natural examples or laboratory experimental quantifications. Complementary to the information in this chapter, a detailed analysis of the mechanisms and processes that govern dissolution of a phase are discussed in detail in Chap. 5 and more detailed information about molecular modeling approaches are outlined in Chap. 2.

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The Use of Scattering and Spectroscopic Synchrotron Radiation Methods in Materials Science

Bras

2009

Applications of Synchrotron Light to Scattering and Diffraction in Materials and Life Sciences

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The development of monodispersed alumino-chromate spinel nanoparticles in doped cordierite glass, studied by in situ X-ray small and wide angle scattering, and chromium X-ray spectroscopy

Cited by 27 publications

References 30 publications

Nanocrystal Growth in Cordierite Glass Ceramics Studied with X-ray Scattering

Nanocrystal Growth in Cordierite Glass Ceramics Studied with X-ray Scattering

Nucleation, Growth, and Aggregation of Mineral Phases: Mechanisms and Kinetic Controls

The Use of Scattering and Spectroscopic Synchrotron Radiation Methods in Materials Science

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