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

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PENGARUH WAKTU DAN TEMPERATUR HIDROTERMAL TERHADAP HASIL UJI XRD HIDROKSIAPATIT DARI CANGKANG KERANG ALE-ALE SERAN, AGUSTO BRIA; Maliwemu, Erich U. K.; Adoe, Dominggus G. H.
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.
ANALISIS FASA KRISTALIN PADA TULANG SAPI TIMOR DENGAN VARIASI WAKTU DAN TEMPERATUR PEMANASAN DENGAN PENGUJIAN XRD soko, raymundus rheymon; Maliwemu, Erich U. K.; Adoe, Dominggus G. H.
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%.
Co-Authors Dominggus Godlief Heryson Adoe SERAN, AGUSTO BRIA soko, raymundus rheymon