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Journal : Makara Journal of Technology

Separation Study of Titanomagnetite Fe3-xTixO4 from Natural Sand at Indramayu, West Java Sunaryo, Sunaryo; Sugihartono, Iwan
Makara Journal of Technology Vol. 14, No. 2
Publisher : UI Scholars Hub

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Abstract

Separation Study of Titanomagnetite Fe3-xTixO4 from Natural Sand at Indramayu, West Java. Titanomagnetite FeTiO4 has been obtained from metal sand which is separated from natural sand at Indramayu using magnetic separator with the magnetic field 0,3 Tesla. This method can improve titanomagnetite content from 32% to 63,6%. According to X-ray diffractometer (XRD) and data processing by general structure analyses system (GSAS) with χ2= 1,454 and Wrp = 0,1142 as correction factor of the peak to peak intensities, we conclude that χ2 about 0 and Wrp aproximately 10%. It indicates the datas with the error merely 0,1 can be accepted. Furthermore, HCl 32% and NH4OH 25% were added into separation result in order to increase titanomagnetite content. While X-ray flouresence (XRF) analyses shows weight fraction of titanomagnetite increase up to 100%.
Structural and Photoluminescence Properties of ZnO Thin Films Deposited by Ultrasonic Spray Pyrolysis Sugihartono, Iwan; Handoko, Erfan; Fauzia, Vivi; Arkundato, Artoto; Sari, Lara Permata
Makara Journal of Technology Vol. 22, No. 1
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Abstract

Zinc oxide (ZnO) thin films on a silicon (Si) (111) substrate were grown herein using ultrasonic spray pyrolysis at 450 °C with different Zn concentrations. The ZnO thin films had X-ray diffraction patterns of a polycrystalline hexagonal wurtzite structure. The (002) and (101) peak intensities changed under different Zn concentrations. Furthermore, according to Scherer's and Stokes–Wilson equations, the crystallite size and the internal strain of the ZnO thin films in the (002) and (101) peaks changed with the Zn concentration. Optically, the photoluminescence spectra indicated that the ratio of the UV/GB emission of the ZnO thin films was the highest at the Zn concentration of 0.02 mol/mL. We predicted that by increasing the Zn concentrations, the nonradiative transitions, which originated from defects, such as lattice and surface defect, become dominant. In conclusion, the ZnO thin films with the Zn concentration of 0.02 mol/mL had a better crystalline and optical quality.
Co-Authors Abdilah, Yusup Achmad Ainul Yaqin Achmad Ainul Yaqin Achmad Ainul Yaqin Achmad Ainul Yaqin Achmad Ainul Yaqin Achmad Jalil Ade Lina Permata Ade Lina Permatasari Ade Lina Permatasari, Ade Lina Adhyatma Alamsyah Adinda Salsabila Khansa Affi Nur Hidayah Aga Noputro Sekartaji Agus Setyo Budi Akhmad Futukhillah Fataba Alaih Al Hasanah, Halimah Alaih, Akhmad Futukhillah Fataba Ali Sabeni Alief Restu Alief Restu Alief Restu, Alief Alifia Nurul Hasanah Alimah, Niken Uswatun Aliyah, Nada Alfi Amalia Dini Silmina Amaliya, Septiana Tri Amanda Larasati Andi Gunawan Anggara Budi Susila Anggie Anastasya Anggoro Budi Susila Anindita Prameswari Safitri Anisah Fauziyyah Annete Gabriella Nuraliya Annisa Feby Nur Rahmasari Annisa Nurul Aini Aris Sunawar Artoto Arkundato Arymbekov, Beken Assita Wahyu Andiani Aulia Putri Azzahra, Ridha Octa Alhuriyyah Bagus Ksatriotomo Bagus Ksatriotomo, Bagus Bambang Heru I Bambang Heru I, Bambang Heru Bambang Heru Iswanto Bambang Soegijono Bayyinah Bernadus Herdi Sirenden Bintang Ramadhan Budhy Kurniawan Cassia, Diva Cuk Imawan Cyrilla, Shafa Rahma Dadang Wihana Destiana Rachmawati Desy Mekarsari Devi Anggraheni Diajeng Ramadhan Dika, Sabna Tamara Djatmiko, Wisnu Djoko Triyono Dona Dianisya Dwi Septiani Efelina, Vita Eko Andri Eko Andri Endah Purwanti Endah Purwanti Erfan Handoko Esmar Budi Esmar Budi Esmar Budi Esmar Budi esmar Budi Esmar Budi Esmar Budi Esmar Budi Esmar Budi Esmar Budi Esmar Budi Esmar Budi Fathir Fajar Sidiq Fathiyyah Husna Sulaiman Fauzia, Vivi Febriana Yunhas Putri Febriani, Immanuella Senja Dwi Febyana Nur Aliffah Febyana Nur Aliffah Fera Kurniadewi Ferdiansyah Faturachman Achmad Ferdy Alfian Indra Prasetya Firmanul Catur Wibowo Fitri Ayu Sundari Fitri Sakinah Fitrianto Nugroho Fitrianto Nugroho, Fitrianto Fitriyani, Vivi Gaguk Jatisukamto Gita Putri Isyafiani Grace Natalia Grace Natalia Hadi Nasbey Hadi Paramu Heriyanto, Yayat W. Heru Iswanto, Bambang I Made Astra I Made Astra I Made Astra I Made Astra Iman Safari Immanuel Bobby Indah Langitasari Indarwati, Siti Hastin Nur Indra Permana Indri Sari Utami Inggrid Ayu Putr Irzan Zakir Isnaeni Isnaeni Isnaeni Isnaeni Isnaeni Isnaeni Isnaeni Isnaeni Isnaeni Isnaeni Isnaeni Isnaeni Isnaeni Iwan Setiawan Jack Luhukay Jack Luhukay Jack Roland Luhukay Jackqluine Aprilia Victoria Jamaludin, Jaja - Jati Ningsih, Siska Miati Kuriah, Yayah Laelatul Dalilah Lailatu Syifa Fadilah Lanny Catherine Lara Permata Sari, Lara Permata Leli Kusumawati Lory Inggi Luhukay, Jack Roland Lutfi Rohman M Ikrar Ramadhan M. Hikam M. Hikam M. Iqrar Ramadhan, M. Iqrar Mangasi Alion Marpaung Marliana Candra Kartika Mas Ayu Yuliana Mashaler Suradam Mashaler Suradam Mashaler Suradam Maykel Manawan Misto Misto Mohar, Rahmat Setiawan Muarief Muarief Muarief Muarief Muarief Muarief Muarief Muarief, Muarief Mudammirotul Ashnam Mudmainah Vitasari Muflih, Abdullah Mu’adz Muhammad Fajar Setiawan Muhammad Fajri Zetra Muhammad Rishadi Muhammad Salman Al Faridz Muhammad Yusuf Nadia Istiqomah Natasya Frysilia Wardanni Nayla Ananda Putri Alisati Novan Purwanto Nur Indah Puspita Nurfina Yudasari Osi Arutanti Putri Lidya Sari Putri Lidya Sari Rafi Rizky Rabbani Rafiudin, Rafiudin RAHARJO Raharjo Raharjo Rahmat Setiawan Mohar Rania Virda Sukmaningsih Refriani Pebria Refriani Pebria, Refriani Reni Rahmadewi Resti Alfianda Ridha Octa Alhuriyyah Azzahra Rifki Reinaldo Rifki Reinaldo Rio Dwi Pambudi Riris Purbosari Riser Fahdiran Rita Amalia Huljannah Rizqon Priyotomo Rizqon Priyotomo, Rizqon Rustana, Cecep E Safitri, Ernik D. Safta Sabrina Santa Melenia Putri Sinaga Sarkadi, Sarkadi Selvi Puspita Dewi Setia Budi Setia Budi Shafa Rahma Cyrilla Sifa Alfiyah Sifa Alfiyah Siti Chaerijah Aurijah Soewoto, Haswi Purwandanu Solihatin, Etin Soraya, Sofiyan Sugiamma Sunaryo Sunaryo Sunaryo Sunaryo Syawal Adrian Syah Syeha Lutfiah Teguh Budi Prayitno Tiam, Tan Swee Tiawati, Nia Tri Bambang A. K. Tri Bambang AK Triyono, Djoko Ulfah Zuhaeriah Vita Efelina Vivi Fitriyani Widyaningrum Indrasari Windrawan, I Gede Wisnu Purno Aji Wisnu Purno Aji, Wisnu Yani Oktaviani Yaqin, Achmad Ainul Yasnita Yasnita Yayah Kuriah Yayat W. Heriyanto Yudasari, Nurfina Yuli Rahmawati Yulia Ermadiana Yuliana Yuliana Zahra Anjani Zahroh, Fitriana Faizatu