Hasil Pencarian  ::  Simpan CSV :: Kembali

Hasil Pencarian

Ditemukan 45 dokumen yang sesuai dengan query
cover
Spectrometric techniques. Vol. II
New York : Academic Press, 1981
535.84 SPE II
Buku Teks SO  Universitas Indonesia Library
cover
Computer methods in UV, visible, and IR spectroscopy/ edited by W.O. George and H.A. Willis
The Royal Society of Chemistry,: 1990,
535.84 COM
Buku Teks SO  Universitas Indonesia Library
cover
Williams, Dudley H.
Spectroscopic methods in organic chemistry / Dudley H. Williams, Ian Fleming
London: McGraw-Hill, 1985
547.308 5 WIL s
Buku Teks  Universitas Indonesia Library
cover
Cooper, James W.
Spectroscopic techniques for organic chemists
New York: John Wiley & Sons, 1980
543.5 COO s
Buku Teks SO  Universitas Indonesia Library
cover
Banwell, Colin N.
Fundamentals of molecular spectroscopy
New Delhi: Tata McGraw-Hill, 1994
535.84 BAN f
Buku Teks SO  Universitas Indonesia Library
cover
Marpaung, Parlindungan P.
Analisis spektrum emisi spontan dari Led InP/InGaAsP pada daerah panjang gelombang 1,3 μm : Tugas seminar
Depok: Fakultas Teknik Universitas Indonesia, 1996
TA3099
UI - Tugas Akhir  Universitas Indonesia Library
cover
Heidi Laysandra
Studi sifat listrik material double perovskite sr2 fe ti o6 dengan metode spektroskopi impedansi pada temperatur tinggi = High temperature electrical properties study of sr2 fe ti o6 double perovskite materials using impedance spectroscopy method / Heidi Laysandra
"ABSTRAK
Sifat struktur, termal, dan listrik pada temperatur tinggi dari senyawa double perovskite Sr2(Fe,Ti)O6telah dipelajari pada penelitian ini.Sr2(Fe,Ti)O6 disintesis dengan metode solid state reaction. Hasil karakterisasi x-ray diffraction pada temperatur kamar menunjukkan bahwa semua sampel memiliki fase tunggal dan memiliki struktur kristal kubik double perovskite dengan space grup pm3m. Variasi jumlah atom Fe dan Ti mengakibatkan kenaikan parameter kisi dan grainsize. Grainsize yang diperoleh berkisar antara 30 nm sampai dengan 80 nm. Sifat listrik sebagai fungsi temperatur dan frekuensi dikarakterisasi menggunakan RLC-meter dengan metode spektroskopi impedansi. Hasil karakterisasi disajikan dalam Nyquist plot dan Bode plot yang digunakan untuk mengidentifikasi rangkaian ekuivalen dan parameternya. Rangkaian ekuivalen yang diperoleh menunjukkan pengaruh grain dan grain boundary terhadap sifat material. Konduktivitas dc Sr2(Fe,Ti)O6 sebagai fungsi temperatur dijelaskan dengan menggunakan persamaan Arrhenius. Energi aktivasi yang diperoleh dari hubungan konduktivitas dc sebagai fungsi temperatur menunjukkan pengaruh grain dan grain boundary pada sampel. Hal tersebut menunjukkan kemungkinan adanya oxygen vacancy pada material Sr2(Fe,Ti)O6. Kemungkinan ini diperkuat dengan hasil karakterisasi field emission scanning electron microscopy (FESEM) untuk menggambarkan morfologi sampel
ABSTRACT
Structure, thermal, and electrical properties of double perovskite material Sr2(Fe,Ti)O6 at high temperature have been studied. Sr2(Fe,Ti)O6 was synthesized by solid state reaction method. X-ray diffraction characterization at room temperature for all samples show single phase and having cubic double perovskite structure with pm3m space group. The variation of Fe and Ti atoms result an increasing of lattice parameter and grainsize which is found between 30 nm and 80 nm. The electrical properties as a function of temperature and frequency are characterized by using RLC-meter with impedance spectroscopy method. The impedance data are presented in Nyquist and Bode plot resulting in the equivalent circuit and its parameters. The equivalent circuit shows the effect of grain and grain boundary in the electrical properties of materials. DC conductivity of Sr2(Fe,Ti)O6 as a function of temperature was explained by using Arrhenius equation. The value of the activation energy which is evaluated from dc conductivity as a function of temperature shows the effect of grain and grain boundary. The activation energy exhibits of oxygen vacancy in Sr2(Fe,Ti)O6 which is also supported by morphology of Sr2(Fe,Ti)O6 characterized by field emission scanning electron microscopy (FESEM)."
Universitas Indonesia, 2015
S60146
UI - Skripsi Membership  Universitas Indonesia Library
cover
Made Gita Somianingsih
Studi spektroskopi impedansi Ba (Fe,Ti) 03 = Study on impedance spectroscopy of Ba (Fe,Ti) 03
"[ABSTRAK
Pada penelitian ini, sifat listrik material Ba(Fe,Ti)O3 diuji dengan spektroskopi
impedansi. Pembuatan material perovskite Ba(Fe,Ti)O3 dilakukan menggunakan
metode solid state reaction. Hasil XRD menunjukkan bahwa semua sampel
adalah single fasa. Penambahan Fe pada BaTiO3 menyebabkan perubahan struktur
kristal dari tetragonal (space groupP4/mmm) menjadi hexagonal (space group
P63/mmc). Penambahan Fe pada BaTiO3 menyebabkan peningkatan grain size
yang dikonfirmasi dengan menggunakan Scanning Electron Microscope (SEM).
Sifat listrik (impedansi sebagai fungsi frekuensi) pada material Ba(Fe,Ti)O3
menunjukkan adanya konstribusi grain dan grain boundary. Hasil Differential
Scanning Calorimetric (DSC) menunjukkan bahwa penambahan Fe pada BaTiO3
menyebabkan peningkatan temperatur Curie dari suhu ~1200C pada BaTiO3
menjadi suhu ~1700C-1750C pada Ba(Fe,Ti)O3.;A study on impedance spectroscopy of Ba(Fe,Ti)O3 has been done. In this
research, electrical behavior ware analysed by using impedance spectroscopy
method. Ba(Fe,Ti)O3 prepared by solid state reaction method. XRD
characterization shows that all sampel are single phase.
ABSTRACT
With Fe addition, the
crystal structure change from tetragonal (without Fe) (space groupP4/mmm) to
hexagonal (space group P63/mmc). The grain size increase with increasing of Fe
contained in BaTiO3 which is confirmed by Scanning Electron Microscope
(SEM). Electrical behavior (impedance as a function of frequency) of Ba(Fe,Ti)O3
shows grain and grain boundary contribution. Differential Scanning Calorimetric
(DSC) shows that with Fe addition, the Curie temperature increases from ~ 1200C
in BaTiO3 to ~1700C-1750C in Ba(Fe,Ti)O3., A study on impedance spectroscopy of Ba(Fe,Ti)O3 has been done. In this
research, electrical behavior ware analysed by using impedance spectroscopy
method. Ba(Fe,Ti)O3 prepared by solid state reaction method. XRD
characterization shows that all sampel are single phase. With Fe addition, the
crystal structure change from tetragonal (without Fe) (space groupP4/mmm) to
hexagonal (space group P63/mmc). The grain size increase with increasing of Fe
contained in BaTiO3 which is confirmed by Scanning Electron Microscope
(SEM). Electrical behavior (impedance as a function of frequency) of Ba(Fe,Ti)O3
shows grain and grain boundary contribution. Differential Scanning Calorimetric
(DSC) shows that with Fe addition, the Curie temperature increases from ~ 1200C
in BaTiO3 to ~1700C-1750C in Ba(Fe,Ti)O3.]"
2016
T45378
UI - Tesis Membership  Universitas Indonesia Library
cover
Lasia, Andrzej
Electrochemical Impedance Spectroscopy and its Applications
"Summary:
This book presents a complete overview of the powerful but often misused technique of Electrochemical Impedance Spectroscopy (EIS). The book presents a systematic and complete overview of EIS. The book carefully describes EIS and its application in studies of electrocatalytic reactions and other electrochemical processes of practical interest. This book is directed towards graduate students and researchers in Electrochemistry. Concepts are illustrated through detailed graphics and numerous examples. The book also includes practice problems. Additional materials and solutions are available online"
New York: NY : Springer New York : Imprint: Springer, 2014
543.6 LAS e
Buku Teks SO  Universitas Indonesia Library
cover
Tanjung, Alfiqie
Analisis perbandingan respon fluktuasi bahan dari kelompok set data menggunakan transformasi statistika tamsir pada hasil sensor kapasitif multi spektral = Comparison analysis of material fluctuation response from data set sets using statistical transformation tamsir on multi spectral capacitive sensor results
"ABSTRAK
Sensor kapasitif Multi Spektral merupakan sebuah sensor yang dibentuk berdasarkan konsep White Noise Impedance Spectroscopy. Konsep ini memanfaatkan pendekatan frekuensi spektral noise/derau dari sinyal domain frekuensi hasil dari pengaruh medan pada dielektrik. Sebagai sebuah sensor, tentunya dibutuhkan konsistensi hasil yang didapatkan stabil, sehingga dapat mempermudah dalam penganalisaan. Pada skripsi ini, penulis mencoba membandingkan antar kelompok data mulai dari 100, 150, 200, sampai 300 data dari total 600 set data untuk H2O murni dan H2O NaOH serta 300 set data H2O HCl menggunakan Transformasi Statistika Tamsir TST . Hasil yang didapatkan nantinya berupa selisih antar kelompok data dengan pola fluktuasi yang berdekatan. Sehingga kelompok-kelompok data tersebut nantinya dapat digunakan sebagai referensi pola fluktuasi suatu bahan.
ABSTRACT
Multi Spectral capacitive sensor is a sensor formed based on the concept of White Noise Impedance Spectroscopy. This concept utilizes the spectral frequency noise approach of the frequency domain signal resulting from field influence on the dielectric. As a sensor, of course, the consistency of the results obtained stable, so it can facilitate in analyzing. In this undergraduated thesis, the authors try to compare between groups of data ranging from 100, 150, 200, to 300 data from total of 600 data sets for pure H2O and H2O NaOH and 300 sets of H2O HCl data using Tamsir Statistics Transformation TST . The result obtained is the difference between the data groups with the adjacent fluctuation pattern. So that data groups can be used as a reference fluctuation pattern of a material."
2017
S-Pdf
UI - Skripsi Membership  Universitas Indonesia Library
<<   1 2 3 4 5   >>