# Red‐emitting transparent Eu<sup>3</sup>⁺‐doped fluorapatite ceramics

https://mdr.nims.go.jp/datasets/3cb68fb3-17f3-45b9-9686-54c453c91925

## File

- [Manuscript_EuFAP_Koizumi.pdf](https://mdr.nims.go.jp/filesets/553c20a3-9deb-4568-85a3-c0235ceb617d/download) ([Detail](https://mdr.nims.go.jp/filesets/553c20a3-9deb-4568-85a3-c0235ceb617d.md))

## Id

3cb68fb3-17f3-45b9-9686-54c453c91925

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2025-10-06T06:51:18.589956Z

## Updated at

2025-12-19T02:02:37.818203Z

## Published at

2026-10-04T23:28:15.912739Z

## Doi

https://doi.org/10.48505/nims.6041

## First published url

https://doi.org/10.1111/jace.70275

## Date published

2025-10-05

## Recorded date published

2026-1

## Resource type

journal_article

## Manuscript type

accepted_manuscript

## Collection



## Title

- title: Red‐emitting transparent Eu<sup>3</sup>⁺‐doped fluorapatite ceramics
  title_type: original
  lang: en

## Description

- description: Transparent red-emitting ceramics have attracted considerable attention
    for advanced optical technologies, yet their practical applications remain limited.
    In the search for new optical materials, there is increasing interest in achieving
    transparency in non-cubic systems; here, we explored the fabrication of red-emitting
    ceramics using fluorapatite, a non-cubic host. Eu³⁺-doped calcium and strontium
    fluorapatite (Eu³⁺:FAP and Eu³⁺:S-FAP, respectively) ceramics were synthesized
    via a wet-chemical route and spark plasma sintering. The ceramics sintered at
    950 °C exhibited the highest transparency, achieving in-line transmittances of
    81.2% and 72.9% at the red wavelength of 619 nm, and grain sizes of 98 and 153 nm,
    respectively. High-resolution transmission electron microscopy confirmed that
    the grain boundaries and triple junctions were free of melts and other inclusions
    that could cause light scattering. Optical characterization revealed strong excitation
    around 460 nm and sharp red emissions corresponding to the ⁵D₀ → ⁷F₁ (∼580 nm)
    and ⁵D₀ → ⁷F₂ (∼620 nm) transitions of Eu³⁺. The fluorescence lifetimes of Eu³⁺:FAP
    and Eu³⁺:S-FAP were 0.5 and 0.87 ms, respectively. These results demonstrate the
    potential of transparent red-emitting Eu³⁺-doped fluorapatite ceramics for solid-state
    lighting and biophotonics.
  description_type: abstract
  lang: und

## Creator

- name: Sanae Koizumi
  role: author
  orcid: https://orcid.org/0000-0003-4680-2482
- name: Abu Yousuf
  role: author
  orcid: https://orcid.org/0009-0003-2195-5041
- name: Yuki Mochizuki
  role: author
- name: Tomoya Ohno
  role: author
- name: Koji Morita
  role: author
  orcid: https://orcid.org/0000-0001-6040-7054
- name: Tohru S. Suzuki
  role: author
  orcid: https://orcid.org/0000-0001-9458-6863
- name: Hiroaki Furuse
  role: author
  orcid: https://orcid.org/0000-0002-9008-1697

## Contact agent



## Publisher

organization: Wiley

## Managing organization



## Keyword

- subject: Transparent ceramics
  schema: not_defined
- subject: apatite
  schema: not_defined
- subject: phosphors
  schema: not_defined
- subject: spark plasma sintering
  schema: not_defined
- subject: optical materials/properties
  schema: not_defined

## Rights

- description: 'This is the peer reviewed version of the following article: Koizumi
    S, Yousuf A, Mochizuki Y, Ohno T, Morita K, Suzuki TS. et al., Red-emitting transparent
    Eu3⁺-doped fluorapatite ceramics. J Am Ceram Soc. 2026; 109:e70275, which has
    been published in final form at https://doi.org/10.1111/jace.70275. This article
    may be used for non-commercial purposes in accordance with Wiley Terms and Conditions
    for Use of Self-Archived Versions. This article may not be enhanced, enriched
    or otherwise transformed into a derivative work, without express permission from
    Wiley or by statutory rights under applicable legislation. Copyright notices must
    not be removed, obscured or modified. The article must be linked to Wiley’s version
    of record on Wiley Online Library and any embedding, framing or otherwise making
    available the article or pages thereof by third parties from platforms, services
    and websites other than Wiley Online Library must be prohibited.'
  identifier: http://rightsstatements.org/vocab/InC/1.0/

## Other identifier(s)



## Data origin

- data_origin_type: other

## Embargo

start_date: 2025-10-05
end_date: 2026-10-05

## Journal

- title: Journal of the American Ceramic Society
  issn: '00027820'
  volume: '109'
  issue: '1'
  article_number: e70275

## Conference



## Related item



## Funding

- identifier: " JPMJFR203S"
  funder_name: JST 科学技術振興機構(JST)　
  description: 革新的異方性透明多結晶セラミック材料の創出
- identifier: 21H01611
  funder_name: 日本学術振興会（JSPS）
  description: 異方性多結晶レーザーセラミックスの創製：ナノ組織化と配向制御
- identifier: 23K21035
  funder_name: 日本学術振興会（JSPS）
  description: 異方性多結晶レーザーセラミックスの創製：ナノ組織化と配向制御

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## Fileset

- id: 553c20a3-9deb-4568-85a3-c0235ceb617d
  filename: Manuscript_EuFAP_Koizumi.pdf
  content_type: application/pdf
  size: 1346522
  md5: 9461fa81a06fcdc9277b623e66730a75

## Thumbnail

fileset_id: 553c20a3-9deb-4568-85a3-c0235ceb617d
filename: Manuscript_EuFAP_Koizumi.pdf