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Journal : SAINS DAN MATEMATIKA

The Effect of BaCO3 Compound Changes on the Formation of Magnetic Material BaFe12O19 Priyono, Priyono; Cahyono, Agung; Marhaendrajaya, Indras; Subagio, Agus; Gunawan, Vincensius
JURNAL SAINS DAN MATEMATIKA Volume 23 Issue 4 Year 2015
Publisher : JURNAL SAINS DAN MATEMATIKA

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Abstract

BaFe12O19 is a permanent magnetic material which has superior properties to be excellent until the late of twentieth century. Some of the obstacles in the synthesis of the material using a stoichiometric composition is a difficulty to obtain a single phase and the second phase is always found. This research attempted to make modifications on the initial non-stoichiometric composition by varying the fraction of Ba/Fe through BaCO3 and Fe2O3 compound through solid state reaction mechanism. This solid state reaction was initiated by mixing various fractions of BaCO3 and Fe2O3 powder composition and compacted to produce a homogeneous mixture using a planetary milling. After drying and molding, it was obtained a homogeneous mixture like a cylinder with a diameter of 2:54 cm and a thickness of 0.5 cm. The BaFe12O19 phase was obtained by heating the sample at a temperature of 1200 ° C for 4 hours. To determine changes in the fraction of Ba/Fe before and after sintering, the samples were tested by X-Ray Fluorescence (XRF), while the structure and crystallinity were tested by X-ray diffraction (XRD) and Scanning Electron Microscope (SEM). The results showed that during the heating process, the reduction of barium fractions exceeded 5% from of their initial weight, while changes in the fraction of Fe was not significant. The results of structure and crystallinity measurement showed that the addition a substantial amount of barium carbonate can lead to the decrease of crystallinity from 35.271 nm to 11.265 nm.
Pembuatan Material Magnetik Komposit BaFe9Mn0,75Co0,75Ti1,5O19 / Elastomer untuk Aplikasi Penyerap Gelombang Elektromagnetik Priyono, Priyono; Prasongko, Windu Ganar
JURNAL SAINS DAN MATEMATIKA Volume 21 Issue 1 Year 2013
Publisher : JURNAL SAINS DAN MATEMATIKA

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Abstract

Telah dilakukan penelitian dan pengujian material magnet BaFe12-2x(MnCo)xTixO19 yang merupakan material magnet Hexaferrite tipe M dan disubtitusi secara parsial 2 ion Fe3+dengan sebuah ion Mn2+,Co2+,dan sebuah ion Ti4+ dengan menggunakan metode sol gel.Material magnet dibentuk dari senyawa-senyawa Ba(NO3)2,Fe(NO3)2,Mn(NO3)2,Co(NO3)2,Ti(NO3)4.BaFe12-2x(MnCo)xTixO19 untuk x=1,5 disintesis dengan menggunakan metode sol gel, berupa serbuk. Hasil dari uji magnetik diperoleh nilai koersivitasnya 3,8 kA/m dan nilai magnetisasinya 0,29 Tesla.Hasil uji densitas pellet barium heksaferrite bernilai 3,453 hingga 5,060 gr / cm3 untuk lolos saring 90 μm.Analisa morfologi permukaan sampel dengan menggunakan Scanning Electron Microscopy (SEM) menunjukkan adanya heterogenitas ukuran partikel.Hasil uji absorbsi menunjukkan penyerapan pada daerah range 8-12 GHz.Hasil uji mekanik menunjukkan bahwa uji daya rekat elastomer memiliki variasi nilai pada titik yang berbeda.   Keywords: BaFe12-2x(MnCo)xTixO19 untuk x=1,5,sol gel
Pengayaan Yodium dan Kadar NaCl pada Garam Krosok menjadi Garam Konsumsi standar SNI Enrichment of Iodium and Sodium Cloride in the Traditional Salt become Consumtion Salt INS Standard M. Nur; I. Marhaendrajaya; Sugito Sugito; T. Windarti; Arnelli Arnelli; R. Hastuti; A. Haris; W. H. Rahmanto; Didik Setiyo Widodo; F. Ariyanto; Z. Muhlisin; J. E. Suseno; E. Setiawati; H. Sutanto; Priyono Priyono; M. Izzati; R. Hariyati; S. Tana; B. Raharjo; D. Ispriyanti; Farikhin Farikhin; A. Rusgiyono; Suhartono Suhartono
JURNAL SAINS DAN MATEMATIKA Volume 21 Issue 1 Year 2013
Publisher : JURNAL SAINS DAN MATEMATIKA

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Abstract

This research has been carried out in the quality improvement of traditional salt (krosok salt) into salt consumption for the Indonesian National Standard. This report is devoted to the elevated levels of NaCl and KIO3. Increased levels of NaCl and Iodine (represented by KIO3) is done by washing the salt with the traditional clothes washer with two rounds and by using water with saline solution at 22-24 Be (known as the old water). Traditional salt taken from three districts, such as Pati District, Jepara District, and Rembang District. We found that the concentration of NaCl in the treatment salt maximum is  96 % and Iodium or present of KIO3 is 40 ppm.   Key words: Salt,  traditional, INS, Consumtion, NaCl, KIO3
Co-Authors A Manaf A. Haris A. Rusgiyono A.A. Ketut Agung Cahyawan W Abidin, Nur Achmad Imam Agung AF Kurniawan, AF Agfianto, Tomi Agung Cahyono Agus Anggoro Sigit Agus Subagio Agus Trihandoyo Agus Ulinuha Ahmad Asrori Ali Haidir Alif Noor Anna Aminuyati Anas M Najih Andi Andi Andi Gunawan Andi Saryoko Andoyo, Andreas Angelina, Dian Anggrellanggi, Arsy Arif Jauhari Arisandy, Poppy Arisanty, Poppy ARIWIBOWO, PRASETIO Arnelli Arnelli Artian, Artian Sirun Artian Aryo Tunjung Kusumo Astia Ningsih, Dwi Atien Priyanti Augustine, Yvonne Auliani, Faulhia B. Raharjo Bahri, Saiful Bawano, Franklin Bawono, Ari Bianome, Wofrid Erlista Bianome, Wolfrid Choirul Amin Choirul Anam AM Diponegoro D. Ispriyanti David David Dian Puspita Didik Setiyo Widodo Dilahur Dilahur, Dilahur Dima, Adid Balle Dina Syafrianingsih, Dina Dwi Budi Santoso Dwi Purwantoro Sasongko Dwi Wahyu Nugroho Dwiantoro, Tino E. Setiawati Edy Suprapto Endang Sri Sudalmi Eris, Deden Dewantara Erma Kumala Sari F. Ariyanto Fadila, Hana Fahira, Talitha Khansa Fahrizal Fahrizal Fajar Arif Mustofa Fatur, Tiyo Fauziyah, Ridha Feta, Neneng Rachmalia Fiqhan Muslim , Ibnu fiqhan muslim, ibnu Fitria Fitria Fitriyah, Fauziatul Fransisca, Luciana guntoro, adi H. Sutanto H. Sutanto Henny Armaniah Henny Destiana Heri Sutanto Hindriari, Reni Hocky, Agus Hodo, Yeremias Lake Hudzaifah Hazazi Zia Kusuma Hutahuruk, Marice Br I Gusti Bagus Wiksuana I Gusti Putu Asto Buditjahjanto I Nurhasanah I. Marhaendrajaya Ihwan Susilo, Ihwan Iis Nurhasanah Ilmy Zaada Faidullah Imam Hardjono Indras Marhaendrajaya Isti’ana Maftuchah, Isti’ana J. E. Suseno Jasman Jasman Jatmiko Endro Suseno Joko Sudarto Joni Joni Juwanda, Farikhin K Sofjan Firdausi K, Basri K. S. Firdausi, K. Karnaji Karnaji Karyono Karyono Ketut Sofjan Firdausi, Ketut Sofjan Kharis Triyono Khasan Rowi Kholifah, Desiana Nur Kilat Permana Putra Kliwon Hidayat Kristanto, Daniel Kudri, Muhammad Wan Kudri, Wan Muhammad Kukuh Dwi Septiana Kusumo, Aryo Tunjung Kuswaji Dwi Priyono Laia, Maria Monika Septa Lila Dini Utami Lilik Anifah Luktyansyah, Insyiah Meida M. Imam Taufiq M. Izzati M. Nur Manesi, Damianus Manurung, Lengsi Mau, Sealtial Mau, Sealtiel Maximilian M. J. Kapa, Maximilian M. J. Muh Yasin YBIC Muhammad Abdul Aziz Muhammad Faisal Muhammad Farid Aminudin, Muhammad Farid Muhammad Hilman Fakhriza, Muhammad Hilman Muhammad Rivai Mujiono Mujiono Munawar Cholil Muryanto Nanda, Adi Prasetia Nasution, Ali Napiah Nofiar, Nofiar Nofrizal Nofrizal Nufus, Khayatun Nurdin Ibrahim Nurkholis Nurkholis Nurul Taufiqu Rochman Nurwenda Novan Maulana Nyoto Nyoto, Nyoto Panca Saputra, Elin Paramita, Safira Arta Pardoyo Pardoyo Passu, Ahas Weros PRAKOSO, Haryo Tejo Putri, Ega Harnanditya Putri, Novia Kelana Putri, Novita Yulia R. Hariyati R. Hastuti Radyum Ikono Rahayu, Adi RAHMAD MAHENDRA SARWIJIWO Rahmat Tri Yunandar Ramadhani, Syaikhah Aditya Ranam, Sanudin Regina Ayu Andini Rezki, Muhammad Ricky Ricky Rike Yudianti Rike Yudianti Rismaya, Siska Riyaji, Akbar Rizaldi Putra Rohana, Krisma Dwi Rosihan Asmara RR. Ella Evrita Hestiandari S Siswanto S, Yvonne Augustin S. Suryono S. Tana Sanggam Ramantisan Saputara, Elin Panca Saputro, Achmat Yulyadi Saputro, Avisema Sigit Sartono Joko Santosa Satria, Rita Siregar, Valdi Muhamad Rafiansyah Siregar, Valdi Muhammad Rafiansyah Sirih, Muhammad Siswadi Siswadi Soekarno Mismana Putra, Soekarno Mismana Sri Hartati Sri Wahyuni Subagya Subagya, Subagya Subhan Subhan Sudarno Sudarno Sugito Sugito Suhardjono Suhardjono Suhartono Suhartono Sulastri Sulastri Suldalmi, Endang Sri Sulistyawan A Sulistyo Sulistyo Sunarhadi, M. Amin Sundari Utami, Shinta Supratiwi, Mahardika Suryadhitia, Rachmat Suryadithia, Rachmat Suswandi, Suswandi Suyono Suyono Syukur, Adnan T. Windarti Tage, Oktafianus Tamelan, Paul G. Taufik Rahman Thaka, Indra Tito Prastyo Rahman To, Yonas Tri Atmoko Tri Susilowati U Kaltsum, U Ummi Kaltsum Valencia, Erica Very Richardina Vincensius Gunawan S.K. W. H. Rahmanto Wibisono, Sigit A. Widiyanto Widiyanto Widyastuti, Lina Ayu Windu Ganar Prasongko Windu Ganar Prasongko Wofrid E. Bianome Yulanda, Novidya Yuli Priyana Yuswono Yuswono Z. Muhlisin Zaenul Muhlisin