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Syahfandi Ahda
Badan Tenaga Nuklir Nasional
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Pengaruh Penambahan SrTiO3 pada Struktur dan Sifat Listrik Bahan Piezoelektrik BNT-BT Delfia, Uchi; Mahyudin, Alimin; Ahda, Syahfandi
Jurnal Fisika Unand Vol 3 No 1: Januari 2014
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jfu.3.1.%p.2014

Abstract

Sintesis bahan piezoelektrik BNT-BT dengan menambah SrTiO3 telah dilakukan dengan menggunakan metode solid state reaction. Parameter yang digunakan pada metode ini diantaranya penggerusan selama 4 jam, kompaksi dengan tekanan 5000 psi, kalsinasi selama 1 jam pada suhu 300oC dan sintering pada suhu 1000oC selama 4 jam. Pada penelitian ini dilakukan variasi terhadap persentase SrTiO3 sebesar 2,5%, 5%, 7,5% dan 10%. Sampel dikarakterisasi menggunakan LCR meter dan STA. Hasil karakterisasi LCR menunjukkan pada penambahan 7,5% ST terdapat lonjakan tajam pada nilai konstanta dielektrik yaitu sebesar 3625, begitupun untuk nilai temperatur curienya sebesar 400oC. Hasil karakterisasi STA menunjukkan nilai onset tertinggi yang diindikasi sebagai daerah perubahan fasa dari feroelektrik ke paraelektrik berada pada penambahan 7,5% mol ST. Ini memperkuat kemungkinan bahwa daerah MPB (Morphotropic Phase Boundary) berada pada penambahan 7,5% mol ST untuk bahan BNT-BT-ST.
PENGARUH PENAMBAHAN BAHAN DOPAN TA2O5 PADA BAHAN PIEZOELEKTRIK RAMAH LINGKUNGAN (K0,5NA0,5)0,96LI0,04NO3 DENGAN MENGGUNAKAN SINTESIS METODE MOLTEN SALT -, Awaluddin; Mahyudin, Alimin; Ahda, Syahfandi
Jurnal Fisika Unand Vol 4 No 2: April 2015
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jfu.4.2.%p.2015

Abstract

ABSTRAKTelah dilakukan penelitian tentang pengaruh penambahan bahan dopan Ta2O5 pada bahan piezoelektrik ramah lingkungan (K0,5Na0,5)0,96Li0,04NbO3(KNLN)dengan metode sintesis  molten salt.  Dalam penelitian ini  dilakukan variasi persentase mol bahan dopan Ta2O5  sebesar 3%, 7%, 10% dan 12%. Sintesis dilakukan dengan parameter penggerusan selama 4 jam, kalsinasi pada suhu 2500C selama 1 jam, dan sintering pada suhu 9200C selama 4 jam. Berdasarkan analisis XRD dapat diidentifikasi bahwa struktur bahan piezoelektrik KNLNT (KNLN + dopan) pada penambahan 3% dan 7% cenderung ortorhombik, sedangkan pada penambahan 10% dan 12% cenderung tetragonal. Pada penambahan 7% mol Ta2O5 terjadinya penurunan nilai c/a yang tajam. Hal ini menunjukkan bahwa pada rentang komposisi inilah daerah motphotropic phase boundary berada.  Hasil SEM menunjukkan pada penambahan dopan 3% ukuran partikel adalah 0,0884-0,7869 μm dan penambahan dopan 12% terjadi lonjakan tajam ukuran partikel yaitu sebesar 0,1563-1,5793 μm.AbstractResearch on the effect of the addition of dopant materials Ta2O5 on environmentally friendly piezoelectric materials (K0,5Na0,5)0,96Li0,04NbO3(KNLN) with molten salt synthesis method has been conducted. In this study, the mole percentage dopant materials varied by 3%, 7%, 10% and 12%. Synthesis was conducted with parameters: grinding for 4 hours, temperature calcination at 2500Cfor 1 hour, and sintering at a temperature of 9200C for 4 hours. Based on XRD analysis, it can be identified that the structure of the piezoelectric material KNLNT (KNLN + dopant) on the addition of 3% and 7% tend orthorhombic, while the addition of 10% and 12% tend to tetragonal. In addition of 7 % mol of Ta2O5, the c/a value decrese sharply. This value indicates that motphotropic phase boundary is located in this composition range. The SEM results show that at addition of 3% dopants the particle size is from 0.0884 to 0.7869 μm and at addition of 12% dopant the particle size increase sharply that  to 0.15623 until 1.5793 μm. 
Synthesis and Characterization of LaF3:Ce Scintillator Material Sukirman, Engkir; Purwamargapratala, Yustinus; Sugeng, Bambang; Wahyudianingsih, Wahyudianingsih; Gunawan, Indra; Ahda, Syahfandi; Sudjatno, Agus; Dimyati, Arbi
Jurnal Sains Materi Indonesia Vol. 25 No. 1 (2023): Jurnal Sains dan Materi Indonesia
Publisher : BRIN Publishing (Penerbit BRIN)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55981/jsmi.2023.185

Abstract

Synthesis and Characterization of LaF3:Ce Scintillator Material.Synthesis and characterization of the LaF3:Ce scintillator have been carried out. Synthesis was carried out using the co-precipitation method. In this study, the raw materials used were NaF, LaCl3•7H2O, and Ce(NO3)3•6H2O with ethanol and distilled water as a solvent; while surfactants were used oleic acid. In this study, the compound LaF3:0.2Ce was synthesized. The sample was characterized by using an X-Ray Diffractometer (XRD), a Scanning Electron Microscope (SEM), and a Spectrofluorometer. The analyzed data showed that the 82.6 weight fraction of LaF3:0.2Ce phase has precipitated accompanied by the formation of NaCl and C2Ce phases of 5.1 and 12.3 weight fraction, respectively. The NaCl phase is a by-product of the chemical reaction: xLaCl3•7H2O + zCeCl3•7H2O + 3NaF → LaxCezF3 + 3NaCl + 7H2O which could be removed from the precipitate solution by an appropriate separation method, while the C2Ce one appeared as a result of heating the sample at 400ºC. The LaF3:Ce scintillator sample shows the phenomenon of a bluish glow with a lifetime, t = 6 × 10-10 seconds even in the presence of a foreign phase. The existence of NaCl and C2Ce as a local environment still makes LaF3:0.2Ce has normal lifetime characteristics.
Co-Authors Agus Sujatno Alimin Mahyudin Ambarwati, Vita Andon Insani Arbi Dimyati Arsal Chayri Iby Awaluddin -, Awaluddin Bambang Sugeng Bandriyana Diene Hairani Engkir Sukirman Ferhat Aziz Indra Gunawan Iskandar, Mohamad Riza Mardiyanto Mardiyanto Marzuki Silalahi Mohammad Dani Nanda Shabrina Panitra, Mardiyanto Mangun Permatasari, Novita Dwi Permatasari, Novita Dwi Rivai, Abu Kahlid Sudjatno, Agus Sulistioso Giat Sulistioso Giat Sukaryo, Sulistioso Giat Taufiq, Agus Uchi Delfia Wahyudianingsih, Wahyudianingsih Wicaksana, Hanif Abdurrahman Yosef Sarwanto Yunasz, Iing Farihin (Parikin) Yunasz, Iing Farihin (Parikin) Yustinus Purwamargapratala