Ditemukan 4 dokumen yang sesuai dengan query
Dwi Nanto
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Telah dilakukan sintesa B4C dengan cara mengubah komposisi asam sitrat dan karbon aktif dari suatu komposisi tertentu yang telah diketahui sebelumnya. Untuk pencampuran digunakan ballmill. Karakterisasi dilakukan dengan menggunakan XRD dan FTIR. Hasil XRD memperlihatkan bahwa dengan penambahan asam sitrat, jumlah B4C yang terbentuk naik dan dengan penambahan karbon aktif, jumlah B4C relatif turun sedikit. Data FTIR menunjukkan bahwa penambahan asam sitrat maupun karbon aktif memperlihtakan adanya ikatan-ikatan B - C. Bila dibandingkan dengan data ...
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Depok: Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Indonesia, 2008
T21574
UI - Tesis Open Universitas Indonesia Library
Dwi Nanto
Depok: Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Indonesia, 2003
S28740
UI - Skripsi Membership Universitas Indonesia Library
Dwi Nanto
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Manganite perovskite has a wide variety of potential applications as an advanced material, for example, in magnetic random access memory, spintronics, magnetoelectric, magnetic field sensors and cooling technology, based on magnetism and magnetic materials. In work on cooling technology, magnetic materials show a magnetocaloric effect. Manganite perovskite has some fundamental properties, such as Curie temperature, magnetic entropy change, temperature span and relative cooling power. Current works report detailed properties of manganite perovskite in La0.7Ca0.3MnO3 doped ...
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Depok: Faculty of Engineering, Universitas Indonesia, 2016
UI-IJTECH 7:3 (2016)
Artikel Jurnal Universitas Indonesia Library
Dwi Nanto
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Modern technology for refrigerators and coolers is based on the chemical gas Chlorofluorocarbon (CFC) compression method that is indicative of a high consumption of electricity. The CFC is also understood as a reason for global warming. One of the solutions to this issue is magnetic refrigeration technology, which is environmentally friendly because it does not use any hazardous chemicals or ozone depleting/greenhouse gases. Magnetic refrigeration technology is based on the magnetocaloric effect of magnetic refrigerant ...
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Depok: Faculty of Engineering, Universitas Indonesia, 2016
UI-IJTECH 7:3 (2016)
Artikel Jurnal Universitas Indonesia Library
