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Windarjoto Windarjoto
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Earth & Planetary Sciences Electrical & Electronics Engineering Environmental Science Materials Science & Nanotechnology Physics

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Jarak Pisah Sudut Puncak Difraksi Antara Bidang (hkl) Utama Sebagai Indikator Keorthorhombikan Struktur Kisi Kristal Fase GdBa2Cu3O7-? I Komang Wahyu Surya Permana; Made Sumadiyasa; Windarjoto Windarjoto
BULETIN FISIKA Vol 22 No 1 (2021): BULETIN FISIKA February Edition
Publisher : Departement of Physics Faculty of Mathematics and Natural Sciences, and Institute of Research and Community Services Udayana University, Kampus Bukit Jimbaran Badung Bali

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/BF.2021.v22.i01.p06

Abstract

The orthorombicity of a crystal lattice structure is indicated by the difference in lattice parameter values ??a, b and c. This study aims to show that the split distance value between the angles of the diffraction peaks of the two planes (hkl) closest is the same as the orthorombicity value crystal structure on the GdBa2Cu3O7-? phase. For this purpose, in this study, a compound Gd0,85La0,15Ba2-xSrxCu3O7- has been synthesized with variations of x = 0.00, 0.05, 0.10, 0.20, 0.30 and 0.50. Samples were synthesized using a solid reaction method with wet mixing, sintered at a temperature of 900°C for 12 hours. From the results of XRD spectrum analysis with Match-3 and Rietica software, it is found that by the increasing the content of Sr the pattern of changes in the value of the split distance the angles of the diffraction peaks of (hkl) planes closest, the measurement and calculation results are the same with the changing pattern of the orthorombicity value. The measurement and calculation results, the split distance value between the diffraction peaks angle for the plane of (020) and (200) is almost equal to one-tenth of the orthorombicity value. Thus, the split distance value between the angles of the diffraction peaks of the two (hkl) planes closest can be used as an indicator of the orthorombicity a GdBa2Cu3O7-? phase crystal structure.
Analisis Hasil FTIR Dari Buah Kedondong dan Labu, Ubi Jalar dan Wortel Sebagai Bahan Alternatif Dye Sensitized Solar Cell (DSSC) Dengan Metode Multivariat Engelia Rambu Maramba Meha; Windarjoto Windarjoto; Hery Suyanto
BULETIN FISIKA Vol 23 No 2 (2022): BULETIN FISIKA August Edition
Publisher : Departement of Physics Faculty of Mathematics and Natural Sciences, and Institute of Research and Community Services Udayana University, Kampus Bukit Jimbaran Badung Bali

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/BF.2022.v23.i02.p02

Abstract

Research has been carried out on the analysis of various kinds of fruit as an alternative material for Dye Sensitized Solar Cells (DSSC) using Fourier-Transform Infrared Spectroscopy (FTIR) with the Multivariate method. This study used 6 fruits as samples with 2 fruits as validators (mangosteen and dragon fruits) and 4 other fruits as an alternative fruit (Kedondong fruit, sweet potato, pumpkin and carrot). The sample was made into powder and then was analyzed by FTIR. The FTIR spectra data were processed by the Multivariate method, especially the PCA and Clustering algorithm. The results show that both sweet potato and Kedondong fruit can be used as alternative materials for Dye Sensitized Solar Cell (DSSC) whose characteristics are closer to Dragon fruit.
Co-Authors Engelia Rambu Maramba Meha Hery Suyanto I Komang Wahyu Surya Permana Made Sumadiyasa