# Superheated steam-induced surface-accelerated amorphous-to-crystalline transition in an aluminosilicate inorganic polymer

https://mdr.nims.go.jp/datasets/8dfd6394-e785-4340-9c25-e2dcfe40f243

## File

- [2_Superheated_steam_CAS_GC_okuma.docx](https://mdr.nims.go.jp/filesets/29295a49-8fcb-45a5-a2ae-8b6fe0e0ccd3/download) ([Detail](https://mdr.nims.go.jp/filesets/29295a49-8fcb-45a5-a2ae-8b6fe0e0ccd3.md))

## Id

8dfd6394-e785-4340-9c25-e2dcfe40f243

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2025-09-25T02:44:45.929122Z

## Updated at

2025-09-25T07:30:21.045530Z

## Published at

2025-09-25T07:20:19.983834Z

## Doi

https://doi.org/10.48505/nims.5777

## First published url

https://doi.org/10.1039/D5CE00569H

## Date published

2025-08-07

## Recorded date published

2025-9-22

## Resource type

journal_article

## Manuscript type

authors_original

## Collection



## Title

- title: Superheated steam-induced surface-accelerated amorphous-to-crystalline transition
    in an aluminosilicate inorganic polymer
  title_type: original
  lang: en

## Description

- description: This study demonstrates that the physical properties of amorphous materials
    can be effectively modulated by superheated steam and that inorganic glass, as
    an inorganic polymer, serves as a valuable model system for investigating thermal
    behavior that is not readily accessible in organic polymers. To elucidate the
    effects of superheated steam on glass transition and crystallization, powder compacts
    and plate-shaped CaO–Al2O3–SiO2 (CAS) glass specimens—with a primary composition
    of 28.6CaO–12.6Al2O3–58.8SiO2 in mol% and well-characterized crystallization behavior—were
    calcined at 800–1050°C under superheated steam. Thermal analysis of the powder
    specimens revealed that the onset temperature of the glass transition decreased
    by 60°C, and the first and second crystallization steps were lowered by 25 and
    15°C, respectively, under superheated steam. X-ray diffraction analysis indicated
    that reflections from surface crystalline phases such as anorthite, wollastonite,
    and cristobalite appeared at lower temperatures. Additionally, photographs and
    scanning electron microscopy revealed an increase in the thickness of the surface
    crystalline layer, indicating enhanced surface crystallization under superheated
    steam. These results demonstrate that superheated steam promotes surface-accelerated
    amorphous-to-crystalline transitions of amorphous materials, as demonstrated using
    the CAS glass as an aluminosilicate inorganic polymer.
  description_type: abstract
  lang: eng

## Creator

- name: Shingo Machida
  role: author
  organization: JFCC
- name: Yasuo Nagano
  role: author
  organization: JFCC
- name: Gaku Okuma
  role: author
  orcid: https://orcid.org/0000-0002-2997-9166
  organization: National Institute for Materials Science
  department: Research Center for Structural Materials/Materials Manufacturing Field/Ceramic
    Matrix Composites Group

## Contact agent



## Publisher

organization: Royal Society of Chemistry (RSC)

## Managing organization



## Keyword

- subject: superheated steam
  schema: not_defined
- subject: " inorganic glass"
  schema: not_defined

## Rights

- identifier: http://rightsstatements.org/vocab/InC/1.0/

## Other identifier(s)



## Data origin

- data_origin_type: other

## Embargo



## Journal

- title: CRYSTENGCOMM
  issn: '14668033'
  volume: '27'
  start_page: 6146
  end_page: 6154

## Conference



## Related item



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## Instrument



## Instrument operator



## Instrument managing organization



## Measurement method



## Specimen



## Chemical composition



## Structure for specimen



## Structural feature for specimen



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## Process for specimen treatment



## Computational method



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## Fileset

- id: 29295a49-8fcb-45a5-a2ae-8b6fe0e0ccd3
  filename: 2_Superheated_steam_CAS_GC_okuma.docx
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  size: 1446714
  md5: 8d854d4679c89c3a533b86510c8b3151

## Thumbnail

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filename: 2_Superheated_steam_CAS_GC_okuma.docx