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All Journal LONTAR Jurnal Teknik Mesin Undana (LJTMU )
Erich U. K. Maliwemu
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Mechanical Engineering

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ANALISIS FASA KRISTALIN PADA TULANG SAPI TIMOR DENGAN VARIASI WAKTU DAN TEMPERATUR PEMANASAN DENGAN PENGUJIAN XRD raymundus rheymon soko; Erich U. K. Maliwemu; Dominggus G. H. Adoe
LONTAR Jurnal Teknik Mesin Undana (LJTMU ) Vol 12 No 02 (2025): Oktober 2025
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35508/ljtmu.v12i02.18033

Abstract

The aim of this research is to identify the crystalline phase of Timor cattle bone powder and characterize it using XRD (X-Ray Diffraction) testing. This research uses a method of analyzing the results of XRD (X-Ray Diffraction) of Timor beef bones with variations in heating time and temperature. After the beef bones have been ground, the sample is oven-treated for 1 and 2 hours at a temperature of 1000C, then 5 grams of the sample is taken for testing using XRD (X-Ray Diffraction). The research results show that a 1 hour time variation at a temperature of 100 0C has a purity level of 84.07% with a diameter of 32.81 mm, and a crystallinity of 85.1%. And a time variation of 2 hours at a temperature of 1000C has a purity level of 76.68% with a diameter of 31.97 nm, and a crystallinity of 98.0%.
PENGARUH WAKTU DAN TEMPERATUR HIDROTERMAL TERHADAP HASIL UJI XRD HIDROKSIAPATIT DARI CANGKANG KERANG ALE-ALE AGUSTO BRIA SERAN; Erich U. K. Maliwemu; Dominggus G. H. Adoe
LONTAR Jurnal Teknik Mesin Undana (LJTMU ) Vol 12 No 01 (2025): April 2025
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35508/ljtmu.v12i01.20042

Abstract

This study aims to analyze the changes in chemical composition and phase of ale-ale shells through X-Ray Diffraction (XRD) tests with variations in temperature and oven time. Ale-ale shell samples obtained from Oesapa Beach, Kupang, East Nusa Tenggara, were processed through the preparation, heating, and characterization stages using XRD. Testing was carried out at temperatures of 500°C and 700°C with variations in heating time of 2, 4, and 6 hours. The results of the XRD test showed phase changes in samples heated at a temperature of 500°C, where in samples with a time of 6 hours decomposition occurred into CaO with a purity level of 53.4%. At a temperature of 700°C, samples heated for 2 hours showed a purity of 53.3%, and at 6 hours the purity reached 48.2%. All samples showed diffraction peaks indicating 100% calcite content. These results provide an understanding of the changes in the crystal structure and purity of ale-ale shell material, which can be used in biomaterial applications, especially for bone graft materials.
Co-Authors AGUSTO BRIA SERAN Dominggus Godlief Heryson Adoe raymundus rheymon soko