{
  "abstract": "This study examines the effects of Sm2O3 content on the thermophysical properties and thermal cycling behaviour of RT54 HC phase change composites. Formulations containing 5–20 wt% Sm2O3 were prepared using vacuum assisted melting, magnetic stirring, and bath sonication. Structural and morphological analyses were combined with calorimetric, thermal conductivity, and thermogravimetric measurements. Samples underwent up to 10,000 melting and solidification cycles between 35 and 75 °C. The characteristic RT54 HC spectral and diffraction features remained observable after nanoparticle incorporation, while the phase change temperature range was largely retained across the formulations. Thermal conductivity measured on compacted powders at 25 °C increased from 0.186 W/(m·K) for pristine RT54 HC to 0.282 W/(m·K) at 20 wt% Sm2O3, corresponding to a 51.6% enhancement. At 70 °C, the corresponding conductivities with the PCM matrix in the molten state were 0.178 and 0.260 W/(m·K), giving a 46.1% enhancement. The highest first cycle mean liquid region Cp, evaluated over 62–75 °C, was 4.64 J/(g·K) at 12.5 wt% Sm2O3, representing a 75.6% increase. For this formulation, the melting and solidification enthalpies changed from 181 to 180 J/g initially to 165 and 165 J/g after 10,000 cycles, while the mean liquid region Cp decreased to 3.28 J/(g·K). Thermogravimetric measurements characterized degradation during programmed heating under nitrogen. The results identify different compositions for maximum thermal conductivity and Cp, together with changes in storage capacity during cycling. These findings provide a material characterization basis for subsequent evaluation in thermal energy storage systems.\n\nSupplementary Information: The online version contains supplementary material available at https://doi.org/10.1186/s11671-026-05117-0.",
  "abstract_shown": true,
  "affiliations": [
    "Department of Machinery and Metal Technologies, Vocational School of Higher Education, Batman University, Batman, 72100 Turkey",
    "Department of Mechanical Engineering, Technology Faculty, Firat University, Elazig, 23119 Turkey",
    "Department of Automotive Engineering, Technology Faculty, Firat University, Elazig, 23119 Turkey",
    "Department of Mechatronics Engineering, Technology Faculty, Firat University, Elazig, 23119 Turkey",
    "Tunceli Vocational School, Munzur University, Tunceli, Turkey",
    "Munzur University Rare Earth Elements Application and Research Center, Tunceli, 62100 Turkey",
    "Department of Machine and Metallic Technology, Munzur University, Tunceli, 62100 Turkey",
    "Faculty of Engineering and Natural Sciences, Istinye University, Istanbul, 34396 Turkey",
    "University Centre for Research & Development, Chandigarh University, Mohali, 140413 Punjab India"
  ],
  "article_type": "research article",
  "arxiv": null,
  "author_total": 8,
  "authors": [
    {
      "affs": [
        0
      ],
      "name": "Hüsna Topkaya"
    },
    {
      "affs": [
        1
      ],
      "name": "Ezgi Gurgenc"
    },
    {
      "affs": [
        2
      ],
      "name": "Elshan Sefidgar Shahanaghi"
    },
    {
      "affs": [
        2
      ],
      "name": "Turan Gurgenc"
    },
    {
      "affs": [
        3
      ],
      "name": "Halil İbrahim Yamaç"
    },
    {
      "affs": [
        4
      ],
      "name": "Eda Bakır Gür"
    },
    {
      "affs": [
        5,
        6
      ],
      "name": "Naim Aslan"
    },
    {
      "affs": [
        1,
        7,
        8
      ],
      "name": "Hakan F Öztop"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/11n323sxx7ew1.bib",
  "cited_by": 0,
  "doi": "10.1186/s11671-026-05117-0",
  "fulltext_url": "https://pmc.ncbi.nlm.nih.gov/articles/PMC13737285/",
  "id": "11n323sxx7ew1",
  "issns": [
    "2731-9229"
  ],
  "landing_url": "https://doi.org/10.1186/s11671-026-05117-0",
  "language": "en",
  "licence": "CC-BY-NC-ND-4.0",
  "licence_label": "CC BY-NC-ND 4.0",
  "licence_source": "article",
  "licence_url": "https://creativecommons.org/licenses/by-nc-nd/4.0/",
  "metadata_licence": null,
  "native_subjects": [
    [
      "heading",
      "Research"
    ],
    [
      "openalex",
      "2210|Phase Change Materials Research"
    ]
  ],
  "openalex": "W7225245901",
  "pdf_url": "https://link.springer.com/content/pdf/10.1186/s11671-026-05117-0.pdf",
  "pmcid": "PMC13737285",
  "pmid": "42980710",
  "published": "2026-11-04",
  "publisher": "Springer",
  "ris": "https://research.draconitic.com/paper/11n323sxx7ew1.ris",
  "sources": [
    {
      "first_seen": "2026-11-09T12:22:31Z",
      "native_id": "PMC13737285",
      "source": "pmc",
      "url": "https://doi.org/10.1186/s11671-026-05117-0"
    }
  ],
  "subjects": [],
  "title": "Thermophysical properties and thermal cycling behaviour of RT54 HC nanocomposite phase change materials containing samarium oxide",
  "title_text": "Thermophysical properties and thermal cycling behaviour of RT54 HC nanocomposite phase change materials containing samarium oxide",
  "type": "peer-reviewed",
  "updated_at": "2026-11-09T12:22:31Z",
  "url": "https://research.draconitic.com/paper/11n323sxx7ew1",
  "venue": "Discover Nano",
  "versions": []
}