Effects of radiation on the properties of low thermal expansion coefficient materials: A review

Rajaram, Mohan; Friebele, E. J.

doi:10.1016/0022-3093(89)90327-x

Cited by 34 publications

(21 citation statements)

References 51 publications

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“…36,38 Accordingly, irradiation can give the densification with mechanisms presently speculative. [15][16][17] We can also offer coherent explanation for a few exceptional cases listed in Table I. For Ge 1 As 4 Se 5 , a ternary nonstoichiometric glass, the structure is assumed to be fairly random and three-dimensional.…”

Section: B Radiation Effects On Density In Chalcogenide and Oxide Glmentioning

confidence: 94%

“…13 For instance, As 2 S 3 exposed at room temperature to light emitted from a He-Ne laser exhibits volume expansions of ϳ5%, which can be utilized as microlenses. 14 It may be valuable to mention here that, in SiO 2 glass, irradiation gives rise to an opposite effect, ''radiation compaction,'' [15][16][17] i.e., densification induced by irradiation, which can also be thermally recovered.…”

Section: Introductionmentioning

confidence: 99%

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Photoexpansion inAs2S3glass

Tanaka

1998

Phys. Rev. B

149

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Mechanisms of photoexpansion in chalcogenide glasses have been studied in three respects. A detailed x-ray investigation of As 2 S 3 shows that the photoexpansion can be connected with asymmetric broadening of the first sharp diffraction peak. Comparison between radiation-induced volume changes and density ratios of glassyto-crystalline forms in As 2 S 3 and SiO 2 implies that As 2 S 3 can expand since the glass is as dense as its crystal. When As 2 S 3 is exposed to illumination, the photoexpansion appears earlier and later than the photodarkening for bandgap and subbandgap illumination, respectively. These observations are discussed from a microscopic point of view. ͓S0163-1829͑98͒09209-1͔

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Section: B Radiation Effects On Density In Chalcogenide and Oxide Glmentioning

confidence: 94%

Section: Introductionmentioning

confidence: 99%

Photoexpansion inAs2S3glass

Tanaka

1998

Phys. Rev. B

149

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“…can induce numerous changes in glasses, being the visible coloration one of the most obvious. 17,186,187,192 In particular, X-ray irradiation can induce color centers in some glasses, 21,188 leading to the formation of these defects responsible of the glass darkening 193 and prompting a great interest since these color centers can be generated and bleached reversibly. 22 These and other non-visible defects generated with radiation have been investigated in a wide variety of glassy materials in the last decades, being responsible of the alteration of some physical properties of the glasses such as the optical absorption, 21,22 refractive index, 194 axial stress 195 or thermal expansion coefficient.…”

Section: Introductionmentioning

confidence: 99%

“…22 These and other non-visible defects generated with radiation have been investigated in a wide variety of glassy materials in the last decades, being responsible of the alteration of some physical properties of the glasses such as the optical absorption, 21,22 refractive index, 194 axial stress 195 or thermal expansion coefficient. 192 It is often necessary that glassy materials properly respond under radiation 17, 18 for a specific application. Therefore, studies on defects in glasses induced by X-ray irradiation are important to determine their nature, the possible mechanisms during and after the radiation and the changes on the glass properties.…”

Section: Introductionmentioning

confidence: 99%

“…In the literature, some works have studied the formation and fading dynamic of color centers and/or their possible effects on physical properties when these defects are induced. 17,186,192 Most of these studies devoted to analyze the effect of X-ray irradiation onto glasses, are carried out by irradiating the sample and analyzing later their optical properties. 21,22,188,193 However, in situ and real time studies are necessary for a deeper understanding of the process.…”

Section: Introductionmentioning

confidence: 99%

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Modified Au-Based Nanomaterials Studied by Surface Plasmon Resonance Spectroscopy

Serrano

2015

Springer Theses

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A mis padres y hermanosA Raúl "La educación es el arma más poderosa para cambiar el mundo", Nelson Mandela, 1918-2013 "Experimental physics cannot do without instruments", Jean-Antoine Nollet, 1700-1770. AgradecimientosDurante el desarrollo de esta Tesis, muchas son las personas e instituciones involucradas a las que me gustaría dar las gracias. Sin su ayuda y apoyo, este trabajo no hubiera sido posible.En primer lugar quiero dar las gracias de manera muy especial al Dr. MiguelÁngel García y al Dr.Óscar Rodríguez por haberme dirigido la tesis. Un millón de gracias por creer en mí y haberme enseñado tanto, por motivarme, guiarme y ayudarme a crecer en el mundo de la investigación, por esos turnos en Spline, por los viajes, por esas charlas,... Ha sido una suerte contar con vosotros tanto en el trabajo como a nivel personal.Al Dr. Germán Castro. Gracias por aceptar la idea loca de montar un sistema de plasmones en la línea de absorción, por involucrarte como el que más, porque siempre estás disponible para hablar y enseñar ciencia. Por tu vitalidad y energía inagotable.Al Prof. José Francisco Fernández Lozano, por sus buenos consejos, su disposición, sus ideas y su dedicación. Gracias por introducirme en el mundo de la empresa e iniciarme en el campo de la cerámica.Al Prof. José Llopis por su gran ayuda en mis inicios y sus interesantes lecciones sobre plasmones. A la Dra. Noemí Carmona, por su buena disponiblidad yánimo. Gracias por acercarme a los vidrios históricos.Al Prof. Juan Rojo, a la Dra. Arantzazu Mascaraque, al Dr. MiguelÁngel González y todo el grupo de Ciencia de Superficies de la Universidad Complutense de Madrid, por hacerme siempre un hueco para medir en el AFM, por dejarme ir a hablaros de mi trabajo, por vuestras ideas, ayuda yánimo.También gustaría agradecer a la Dra. Mar García y a la Dra. Alicia de Andrés, del Instituto de Ciencia de Materiales de Madrid, por las medidas magnéticas (no presentadas en este trabajo) y por la discusión sobre las medidas Raman, respectivamente. A Charlie, porque no hay mejor compañía para trabajar en el laboratorio. A Eva, la nueva incorporación del grupo, que está más que integrada. A los que se han ido pero se dejan ver: Mara, Helen, Leti, Alberto A., Quique, Monikaka, Marta, MariCani,..., porque siempre es un buen momento estar con vosotr@s, dentro y fuera del trabajo. ¡Muchas gracias! De manera muy especial me gustaría dar las gracias a Esther y Cris, porque desde que empezamos la carrera siempre habéis estado ahí para apoyarme y tirar de mí cuando más lo necesitaba. Gracias Esther por coger el relevo y hacer de becaria por unos días. Por esos cotilleos, tan necesarios para empezar el día. Porque siempre puedo contar contigo y sabes sacar lo mejor de mí. Gracias Cris, porque siempre estás ahí para cualquier cosa.Porque sabes escuchar y animarme en los no mejores momentos. Porque vuestro esfuerzo y dedicación sólo merecen mi admiración. ¡Gracias chicas! A los del Sauco, por todos los buenos momentos vividos, las risas, los pre-extras, las carreras, porque con v...

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Effect of gamma‐irradiation on the physicomechanical properties of synthetic rubber–based silica composites

Mohamed¹,

Khattab²,

Abdelaziz³

2011

Adv Polym Technol

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Rice husk ash (RHA) and silica-filled nitrile rubber (NBR) composites were prepared using a laboratory-size two-roll mill. The mechanical properties and water absorption were studied before and after being exposed to gamma irradiation from 25 to 200 kGy. The tensile strength increased with RHA up to an optimum filler loading (20 phr) and (30 phr) for a silica-filled NBR composite. The tensile strength for the irradiated composite filled with 30 phr silica increases with an increase in irradiation doses up to 100 kGy. The presence of silica filler phase that has a higher electron density than the polymer matrix will likely result in an increase in cross-linking or scissioning and better dispersion in the matrix. Water absorption studies indicate that the irradiated NBR composite filled with silica has lower water absorption rather than the composite filled with

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Effects of radiation on the properties of low thermal expansion coefficient materials: A review

Cited by 34 publications

References 51 publications

Photoexpansion inAs2S3glass

Photoexpansion inAs2S3glass

Modified Au-Based Nanomaterials Studied by Surface Plasmon Resonance Spectroscopy

Effect of gamma‐irradiation on the physicomechanical properties of synthetic rubber–based silica composites

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