Article Per Year (5 Year)
p-Index From 2019 - 2024
0
P-Index
This Author published in this journals
All Journal JURNAL PENELITIAN SAINTIKA Jurnal Spektra Jurnal Ikatan Alumni Fisika Universitas Negeri Medan
Eidi Sihombing
Jurusan Fisika FMIPA Universitas Negeri Medan Jl. Willem Iskandar, PsrV Medan 20221
Education Physics

Published : 4 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 4 Documents
Search

 1 
PEMBUATAN DAN KARAKTERISASI SUPERKONDUKTOR BAHAN MIKROPARTIKEL BERBASIS BSCCO FASA 2223 DI DOPING Sn DAN Pb Sihombing, Eidi; Lubis, Hariyati
Jurnal Spektra Vol 16, No 3 (2015): Spektra: Jurnal Fisika dan Aplikasinya
Publisher : Jurnal Spektra

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

ABSTRAK  Superkonduktor berbasis bismut Bi2Sr2Ca2Cu3O10+δ (BSCCO) fasa 2223 merupakan bahan superkonduktif yang banyak dikaji untuk meningkatkan suhu kritis dan memperbaiki sifat mekanik yang merupakan masalah dalam aplikasi teknologi. Berbagai metode telah di upayakan untuk meningkatkan suhu kritis dan memperbaiki sifat mekanik yang berkaitan dengan struktur yang diharapkan pada bahan superkonduktor berbasis YBCO, BSCCO, TBCCO, HBCCO.Penelitian superkonduktor ini berbasis BSCCO dibuat dari bahan-bahan nitrat seperti: Bismuth Nitrate (BiNO3), Stronsium Nitrate (SrNO3), Calsium Nitrate (CaNO3), Cupri Nitrate (CuNO3) dan sebagai doping adalah Timbal Nitrate( PbNO3) dan Timah oksida (SnO). Bahan-bahan ini direaksikan melalui reaksi padatan dengan perbandingan molar Bi:Sr:Ca:Cu adalah 2:2:2:3. Reaksi padatan dimaksud dilakukan dengan menggunakan Ballmill pada kelajuan 500 rpm selama 8 jam, menghasilkan partikel berdimeter 207,8 nm di ukur melalui Particel Size Analyzer (PSA), selanjutnya bahan ini di kalsinasi pada suhu 8200C selama 80 jam dan di cetak pada wadah berukuran diameter 1,0 cm, tebal 0,5 cm diberi tekanan 5,0 ton ditahan selama 4 jam, selanjutnya disintering pada suhu 8500C selama 12 jam.Hasil yang diperoleh adalah superkonduktor B(Pb, Sn) SCCO memiliki levitasi sekitar 2,5 cm. Uji XRD memberi hasil parameter kisi: a = 20.8710 Å, b = 9.4960 Å, c = 5.6000 Å disimpulkan bahwa kisi BPbSnSCCO adalah ortorombik dengan permukaan memiliki gumpalan acak yang diperoleh dari uji SEM. Kata kunci : Superkonduktor, BPbSnCCO. PREPARATION AND CHARACTERIZATION OF SUPERCONDUCTORS BASED MICROPARTICLES MATERIAL BSCCO 2223 PHASE IN DOPING Sn AND Pb  ABSTRACT  Bismuth-based superconductors Bi2Sr2Ca2Cu3O10+δ (BSCCO) 2223 phase superconducting is a material that is widely studied to enhanced the critical temperature and improve mechanical properties is a problem in the application of technology. Various methods have been done to enhanced the critical temperature and improve mechanical properties relating to the expected structure based on superconducting materials YBCO, BSCCO, TBCCO, HBCCO. This research-based BSCCO made from nitrate materials: Bismuth Nitrate (BiNO3), Strontium Nitrate (SrNO3), Calcium Nitrate (CaNO3), Copper Nitrate (CuNO3) and as doping is Lead Nitrate (PbNO3) and tin oxide (SnO). These materials are reacted by solids reaction with a molar ratio of Bi:Sr:Ca:Cu is 2:2:2:3. Solid state reaction is carried out by using ballmill speed of 500 rpm for 8 hours, obtained dimeter 207.8 nm particles measured by particle size analyzer (PSA), and in the calcination at a temperature of 8200C for 80 hours and be formed on the cast diameter 1.0 cm, 0.5 cm thick pressurized 5.0 tons for 4 hours, then sintering at a temperature of 8500C for 12 hours. The results obtained are superconducting B(Pb, Sn)SCCO has Meisneer levitation approximately 2.5 cm. XRD test gives results lattice parameters: a = 20.8710 Å, b = 9.4960 Å, c = 5.6000 Å, B(PbSn)SCCO concluded that the lattice is orthorhombic with a surface having a random clotted granules obtained from SEM test. Key words : Superconductor, B(PSn)SCCO
PENGARUH MODEL PEMBELAJARAN BERBASIS MASALAH TERHADAP HASIL BELAJAR PADA MATERI LISTRIK DINAMIS Hia, Faldo Renata; Sihombing, Eidi
JURNAL IKATAN ALUMNI FISIKA Vol 2, No 2 (2016): Jurnal Ikatan Alumni Fisika Unimed Edisi April 2015
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/jiaf.v2i2.4370

Abstract

The aim of research is to know the effect of problem based learning model on student’s learning in the subject of dynamic electricity in X SMA Negeri 15 Medan A.Y. 2015/2016. The type of experiment is quasi-experimental using two group pretest-posttest design. The population is all the student X grade of SMA Negeri 15 Medan consists of 10 classes. The samples of the experiment were taken from 2 classes that determined with cluster random sampling technique, with the class X-7 as the experiment class and class X-1 as control class. The instruments that used is learning test result in essay with 10 questions that have been validated and the student’s learning observation activities sheet. To test the hypothesis used regression test with y = -0,162x + 69,32 and R² = 0,043 with the result that R = 0,207 with the  percentage increase 20,7%, after the prerequisite test is done, that is normality test and homogeneity test. The experiment results showed: (1) the problem based learning model can improve student’s learning activities and (2) there is the effect of problem based learning model on students’ learning outcomes in the subject matter dynamic electricity in class X SMA Negeri 15 Medan 2015/2016.
PENGARUH MODEL PEMBELAJARAN BERBASIS MASALAH TERHADAP HASIL BELAJAR PADA MATERI LISTRIK DINAMIS Hia, Faldo Renata; Sihombing, Eidi
JURNAL IKATAN ALUMNI FISIKA Vol 2, No 2 (2016): Jurnal Ikatan Alumni Fisika Unimed Edisi April - Juli 2016
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/jiaf.v2i2.4370

Abstract

The aim of research is to know the effect of problem based learning model on student’s learning in the subject of dynamic electricity in X SMA Negeri 15 Medan A.Y. 2015/2016. The type of experiment is quasi-experimental using two group pretest-posttest design. The population is all the student X grade of SMA Negeri 15 Medan consists of 10 classes. The samples of the experiment were taken from 2 classes that determined with cluster random sampling technique, with the class X-7 as the experiment class and class X-1 as control class. The instruments that used is learning test result in essay with 10 questions that have been validated and the student’s learning observation activities sheet. To test the hypothesis used regression test with y = -0,162x + 69,32 and R² = 0,043 with the result that R = 0,207 with the  percentage increase 20,7%, after the prerequisite test is done, that is normality test and homogeneity test. The experiment results showed: (1) the problem based learning model can improve student’s learning activities and (2) there is the effect of problem based learning model on students’ learning outcomes in the subject matter dynamic electricity in class X SMA Negeri 15 Medan 2015/2016.
SINTESIS IONOFOR DTODC SEBAGAI BAHAN AKTIF DALAM ELEKTRODA ION SELEKTIF PENENTUAN MERKURY (ISE-Hg) Situmorang, Manihar; Purba, Jamalum; Lamria, Melinda Lena; Cintiya, Henni; Sinulingga, Kiki A. Putri Br.; Sihombing, Eidi
JURNAL PENELITIAN SAINTIKA Vol 14, No 1 (2014): Maret 2014
Publisher : JURNAL PENELITIAN SAINTIKA

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Synthesis of 7,16-dithenoyl-1,4,10,13-tetraoksa-7,16- diazacyclooctadecane (DTODC) as an active material for ion selective electrode mercury (ISE-Hg) is explained. The study is aimed to obtained ionophor DTODC to be used as sensing agent in ISE-Hg for the determination of mercury. The synthesis is carried out through addition and substitution process onto a starting material of 1,4,10,13-tetraoksa-7,16 diazocyclooctadecane (DC). The results showed that pure white crystal of DTODC has been obtained. The target compound has been identified and analysed to confirm its chemical structure. The compound of DTODC has been immobilised into electrode membrane for the construction of ion selective electrode (ISE). The techniques to prepare membrane electrode by using spin coated and casting methods, and the construction procedures to prepare ISE-Hg for determination of mercury have also been studied. 
Co-Authors Cintiya, Henni Hariyati Lubis, Hariyati Hia, Faldo Renata Jamalum Purba Juniar Hutahaean Lamria, Melinda Lena manihar Situmorang, manihar Purba, Nurhayati Sinulingga, Kiki A. Putri Br. winsyahputra Ritonga