The Chemical Durability of Optical Glass

Walters, H. V.; Adams, P. B.

doi:10.1364/ao.7.000845

Cited by 16 publications

(13 citation statements)

References 3 publications

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“…Planarization of glass surfaces, which in this work consists of the grinding and polishing, is a chemo-mechanical process. [38,39]. The chemical processes associated in the grinding and polishing are a complex function of the chemistry and concentration of the water used during grinding and the composition of the oils used during polishing.…”

Section: Xps Analysis Of Isg Glass Surfacesmentioning

confidence: 99%

“…Walter [38] and Spierings [39] proposed that the chemical etching of glasses are the result of 2 different mechanisms: (1) leaching of modifier ions (e.g. Na, Ca) through ion-exchange reactions with protons and (2) dissolution of network formers (e.g.…”

Section: Xps Analysis Of Isg Glass Surfacesmentioning

confidence: 99%

“…However, the equivalent RMS roughness of polished and polished/etched surfaces are observed to be a function of polishing cloth, and equivalent RMS roughness decreases after etching of polished surfaces. Spierings [39] and L. Wong [43] both concluded that the decrease of RMS roughness post etching is due to the coalescence of intersecting scratches.…”

Section: Power Spectral Density (Psd) Analysis Of Isg Glass Surfacesmentioning

confidence: 99%

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Quantitative morphological and compositional evaluation of laboratory prepared aluminoborosilicate glass surfaces

Gong¹,

Wren²,

Mellott³

2015

Applied Surface Science

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a b s t r a c tSurface finishing techniques including polishing, etching and heat treatment can modify the topography and the surface chemical composition of glasses. It is widely acknowledged that atomic force microscopy (AFM) can be used to quantify the morphology of surfaces, providing various parameters including average, peak-to-valley, and apparent root-mean-square roughness. Furthermore advanced power spectral density (PSD) analysis of AFM-derived surface profiles offers quantification of the spatial homogeneity of roughness values along different wavelengths, resulting in parameters including equivalent RMS, Hurst exponent, and fractal dimension. Outermost surface (∼8 nm) chemical composition can be quantitatively measured by X-ray photoelectron spectroscopy. In this paper, we first developed a series of surface finishing methods for an aluminoborosilicate glass system by polishing, etching or heat treatment. The chemical composition and environment of prepared glass surfaces were quantified by XPS and topographical analysis was carried out by fractal and k-correlation model fitting of PSD profiles derived via AFM. The chemical environment of elements, as determined via XPS, present on the prepared surfaces are similar to those within the pristine bulk glass. The compositional evolution of polished and melt surfaces are discussed in context of corrosion phenomena associated with the grinding, polishing, and etching of surfaces and the thermal heat treatment utilized for processing, respectively. Good correlation between surface finishing methods, chemical composition and topographical parameters were observed. More importantly, extensive discussions on topographical parameters including equivalent RMS, Hurst exponent, and fractal dimension are presented as a function of processing method.

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Section: Xps Analysis Of Isg Glass Surfacesmentioning

confidence: 99%

Section: Xps Analysis Of Isg Glass Surfacesmentioning

confidence: 99%

Section: Power Spectral Density (Psd) Analysis Of Isg Glass Surfacesmentioning

confidence: 99%

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Quantitative morphological and compositional evaluation of laboratory prepared aluminoborosilicate glass surfaces

Gong¹,

Wren²,

Mellott³

2015

Applied Surface Science

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“…Generally, the interaction of light with matter is an interesting area in science that has led to many photo-chemical/physical processes in our daily lives. The following section focus on required engineering properties such as optical, mechanical, chemical and thermal, for glasses using literature [80,81,82,83,84].…”

Section: Engineering Properties Of Amorphous Materialsmentioning

confidence: 99%

“…The sharp rise in k also contributes to strong reflections from glass surfaces at the window boundaries, shown in figure 3.1c. For normal incidence, the intensity reflection coefficient from an air-glass interface is given by [81],…”

Section: Refractive Indexmentioning

confidence: 99%

Engineering of semiconductor nanocrystals and metal Ions in amorphous materials

Mada¹

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Semiconductor nanocrystals (NCs), metal ions containing glass based materials have applications in design engineering, and may solve many technological problems. P2O5 based glasses are an important class of materials for several applications, especially for high power laser. Recently, the construction of semiconductor NCs-based phosphate glass materials has been shown to be of high importance for various applications, like in photovoltaics, LEDs, lasers and spintronics. The major challenges are the intentional insertion of dopants into semiconductor NCs aiming expanding their intrinsic functionalities and the scalable incorporation of NCs into host free of hydroxyl and organic species for stabilizing and integrating their performances. On the other hand, the low refractive index of phosphate glass can be adjusted by the addition of a high index of TeO2 content. These hybrid materials fulfil the requirement of refractive index contrast for chromatic dispersion control and are useful for the design of photonic materials. The thesis focus on the design of ZnNiTe semiconductors in transparent phosphate glass-ceramics, and the effect of TeO2 environment in Nd3+ doped phosphate glass for optoelectronic and solid-state laser applications. The structural features of these materials have been determined by XRD, FT-IR and Raman spectroscopic techniques. Optical properties were characterized by using UV-Vis-NIR absorption and fluorescence spectroscopic techniques. The findings were used to estimate crystal field interaction parameters, coordinate state of Ni2+ ions, Judd-Ofelt intensity parameters for Nd3+ ions and radiative properties of metal ions in glasses. Thermal diffusivity (D) and thermal conductivity (K) of ZnNiTe NCs in glasses were determined using thermal lens (TL) and thermal relaxation (TR) techniques. The results revealed that the behaviors of D and K for the studied samples are similar. Nonlinear optical properties of ZnNiTe NCs glasses were also studied using Z-scan technique. The nonlinear refractive property is observed only in the sample containing 5% Ni. Other samples with 1.0% to 10% of Ni content presented nonlinear absorption nature. This suggests that the absorption coefficient, β does not change significantly with the wavelength, but increase with Ni concentration, with confinement effects and two-photon absorption (TPA).

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