Fabrication of Low Temperature Foaming Glass Materials Using Hydrothermal Treatment

Yoshikawa, Takeshi; Sato, Shinsuke; Tanaka, Toshihiro

doi:10.2355/isijinternational.48.130

Cited by 23 publications

(18 citation statements)

References 10 publications

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“…[2][3][4] In addition, the authors have applied the hydrothermal reaction to glass and BF slag for conversion into functional materials by introducing water into the original materials. [5][6][7][8] The CaO-SiO 2 -Al 2 O 3 system is generally used for manufacturing a functional calcium silicate board by hydrothermal treatment below 473 K. The board is mainly produced from cement and quartz sand. The product exhibits excellent properties in heat-insulation and lightness as well as physical strength because vigorous needle-shaped crystals of tobermorite (calcium silicate hydrate; 5CaO · 6SiO 2 · 5H 2 O) formed after the hydrothermal reaction combine the original constitutional particles.…”

Section: Introductionmentioning

confidence: 99%

MgO Effect on Hydrothermal Solidification of Blast Furnace Slag

2008

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Due to the large generation of blast furnace (BF) slag, new recycling processes that produce valuable materials are required. The authors have focused on a hydrothermal treatment of BF slag using waste heat exhausted from iron-and steelmaking processes. Although BF slag contains Al 2 O 3 , which is well known to have a deteriorating effect on hydrothermal reactions, especially CaO-SiO 2 hydration, it can be successfully solidified by hydrothermal treatment above 523 K. We focused on the contribution of MgO in BF slag to the hydrothermal reactivity in the slag system. The hydrothermal solidification of synthesized CaO-SiO 2 -Al 2 O 3 and CaO-SiO 2 -Al 2 O 3 -MgO slags were investigated in the present work. The hydrothermal solidification behaviors of slags are discussed based on the degree and type of crystal formation during the hydrothermal process.KEY WORDS: blast furnace slag; hydrothermal reaction; hydrothermal hot pressing; flexural strength.

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Section: Introductionmentioning

confidence: 99%

MgO Effect on Hydrothermal Solidification of Blast Furnace Slag

2008

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“…Change in shapes of the hydrothermally treated 63 mass% SiO2 -27 mass% Na2O -10 mass% B2O3 glass particles placed in the glass tube;(a) before, (b) after firing by gas burner [4] . …”

Section: Fig 11mentioning

confidence: 99%

“…Fig. 8 (a) SEM micrograph of the hydrothermally treated 63mass%SiO2 -27mass%Na2O-10mass%B2O3 glass, and (b) EDX profiles for the portions A and B in (a) [4] . …”

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Fabrication of porous materials from blast furnace slag and glass materials by the hydrothermal treatment

Yoshikawa¹,

Tanaka²

2008

Journal of High Temperature Society

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Designing research strategy and technology innovation for sustainability by adopting “imaginary future generations”—A case study using metallurgy

Hara

Miura

Suzuki

et al. 2023

Futures & Foresight Science

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To mobilize science and technology for sustainability, it is essential to develop a method for explicitly considering the needs and preferences of future generations in designing research strategies and technology innovations. In this study, we conducted a participatory deliberation experiment on research strategy design of hydrothermal reactions and slag, to analyze whether the adoption of imaginary future generations (IFGs), which is a social system that has been proven to be effective for overcoming shortsightedness and activating futurability of people and society in pursuit of sustainability, could change the direction of research and development (R&D) and thereby innovation. A questionnaire survey was administered to the participants after each deliberation session to verify whether treatments, such as analyzing past R&D initiatives and adopting IFGs in deliberations, would change participants’ perceptions about criteria related to designing R&D programs. The results of the deliberation experiment showed that the contents and ideas of research strategies, such as research visions, methodologies and anticipated benefits, were changed by the adoption of IFGs. The criteria used for designing R&D also altered according to changes in research strategy. The findings showed that adopting IFGs and examining issues from the viewpoint of “futurability” could shift the direction of research agendas and technological innovation. Furthermore, the findings could provide insights into how to design R&D strategies and generate innovations in pursuit of sustainability by reflecting upon the needs of and benefits to future generations.

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Fabrication of Low Temperature Foaming Glass Materials Using Hydrothermal Treatment

Cited by 23 publications

References 10 publications

MgO Effect on Hydrothermal Solidification of Blast Furnace Slag

MgO Effect on Hydrothermal Solidification of Blast Furnace Slag

Fabrication of porous materials from blast furnace slag and glass materials by the hydrothermal treatment

Designing research strategy and technology innovation for sustainability by adopting “imaginary future generations”—A case study using metallurgy

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