Sintering of Silica Aerogels for Glass Synthesis: Application to Nuclear Waste Containment

Woignier, Thierry; Reynes, Jerome; Phalippou, J.

doi:10.1007/978-1-4419-7589-8_29

Cited by 3 publications

(2 citation statements)

References 38 publications

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“…The mechanical behavior of matrices containing nuclear wastes should be as high as possible because fracturing of the matrix will increase the corrosion rate (i.e., increase the contact surface between the solid and water). The rupture strength decreases progressively with the Nd loading and the weakening is important when Ce loading is higher than 10-15% [48]. Figure 15 compares the experimental data of the elastic modulus with calculated data given by the Reuss model [49].…”

Section: Thermomechanical Propertiesmentioning

confidence: 92%

“…Long-term aqueous corrosion results [48] also suggest that in these new matrices a limit of solubility is attained that prevents alteration of the material, which is not the case of standard nuclear waste glass in which the process of corrosion is never stopped in water [8,57,58]. In the literature, the corrosion of the Nd glass ceramics has also been studied through soxhlet experiments [9,23].…”

Section: Chemical Durabilitymentioning

confidence: 99%

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Nanoporous Glasses for Nuclear Waste Containment

Woignier

Primera²,

Jér

et al. 2016

Journal of Nanomaterials

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Research is in progress to incorporate nuclear waste in new matrices with high structural stability, resistance to thermal shock, and high chemical durability. Interactions with water are important for materials used as a containment matrix for the radio nuclides. It is indispensable to improve their chemical durability to limit the possible release of radioactive chemical species, if the glass structure is attacked by corrosion. By associating high structural stability and high chemical durability, silica glass optimizes the properties of a suitable host matrix. According to an easy sintering stage, nanoporous glasses such as xerogels, aerogels, and composite gels are alternative ways to synthesize silica glass at relatively low temperatures (≈1,000–1,200°C). Nuclear wastes exist as aqueous salt solutions and we propose using the open pore structure of the nanoporous glass to enable migration of the solution throughout the solid volume. The loaded material is then sintered, thereby trapping the radioactive chemical species. The structure of the sintered materials (glass ceramics) is that of nanocomposites: actinide phases (~100 nm) embedded in a vitreous silica matrix. Our results showed a large improvement in the chemical durability of glass ceramic over conventional nuclear glass.

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Section: Thermomechanical Propertiesmentioning

confidence: 92%

Section: Chemical Durabilitymentioning

confidence: 99%

Nanoporous Glasses for Nuclear Waste Containment

Woignier

Primera²,

Jér

et al. 2016

Journal of Nanomaterials

Self Cite

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Characterization of Tantalum Oxide Sol–Gel-coated AZ91 Mg Alloys

Gül

Albayrak

Çinici

2020

Trans Indian Inst Met

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Preparation of aerogel and its application progress in coatings: a mini overview

et al. 2021

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Aerogels are predominantly mesoporous, extremely lightweight, low density (∼ 0.003 g/cm3) and thermally insulating materials. Over the years, aerogels have gained increasing attention due to their extraordinary properties (light, heat, sound, electricity and force) and application potentials in varieties of fields. Several studies have been carried out regarding aerogel preparation and its applications in coatings on different substrates. In this review, an overview of aerogels preparation and their application progress in coatings of most common substrates is presented. Attention is paid to aerogel coatings of textiles, leather, and substrates other than leather and textiles for special functionalities that could address the application progress in coatings. This review will help to inspire scientists and engineers towards novel aerogel materials and technologies to boost the industrial fabrication of flexible advanced materials.

show abstract

Sintering of Silica Aerogels for Glass Synthesis: Application to Nuclear Waste Containment

Cited by 3 publications

References 38 publications

Nanoporous Glasses for Nuclear Waste Containment

Nanoporous Glasses for Nuclear Waste Containment

Characterization of Tantalum Oxide Sol–Gel-coated AZ91 Mg Alloys

Preparation of aerogel and its application progress in coatings: a mini overview

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