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FABRIKASI DAN KARAKTERISASI SIFAT OPTIK DARI Ba1-xSrxTiO3 MENGGUNAKAN SPEKTROFOTOMETER ULTRAVIOLET VISIBLE Dewi, Rahmi; Krisman, Krisman; Yulitah, Detri; Zuhdi, Zuhdi
SEMIRATA 2015 Prosiding Bidang Fisika
Publisher : SEMIRATA 2015

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Pembuatan Ba1-xSrxTiO3(BST) dengan komposisi x=0,1 0,2 dan 0,3 dengan suhu yang berbeda-beda masing-masing 550, 600 dan 650ÂºC pada substrat kaca dengan metode Sol-gel telah berhasil dilakukan. Tujuan yang akan dicapai dalam penelitian ini adalah untuk mendapatkan nilai absorbansi dan transmitansi bahan BST dengan komposisi dan suhu yang berbeda. Karakterisasi dilakukan menggunakan spektrofotometer Ultraviolet-Visible. Untuk komposisi x=0,1 nilai absorbansi maksimumnya pada suhu 550, 600 dan 650ÂºC masing-masing adalah 0,108a.u, 0,132a.u, dan 0,076a.u, untuk komposisi x=0,2 nilai absorbansi maksimumnya 0,147a.u, 0,174a.u, 0,077a.u, dan untuk komposisi x=0,3 nilai absorbansi maksimumnya 0,316a.u, 0,195a.u, 0,105a.u. Nilai transmitansi maksimum untuk x=0,1 pada suhu 550, 600 dan 6500C masing-masing adalah 97,9%, 97,7%, dan 96,6% dan untuk x=0,2 nilai masing-masing transmitansinya adalah 90,7%, 98,1%, 94,8% sedangkan untuk komposisi x=0,3 masing-masing nilai transmitansinya adalah 88,5%, 80,3%, dan 93,7%. Hasil tersebut menunjukkan bahwa perbedaan suhu mempengaruhi absorbansi yang didapat dan semakin besar komposisi Srontium (Sr) yang digunakan maka semakin besar absorbansi yang dihasilkan dan untuk nilai transmitansi berbanding terbalik dengan nilai absorbansi. Kata Kunci: Barium Strontium Titanat, Absorbansi, Transmitansi, Annealing, Sol-Gel, Spektroskopi Ultraviolet-Visible(UV-Vis).

KARAKTERISASI BAHAN FERROELEKTRIK BARIUM STRONTIUM TITANAT (Ba0.3Sr0.7TiO3) DENGAN MENGGUNAKAN DIFRAKSI SINAR-X (XRD) Krisman, Krisman; Dewi, Rahmi; Efendi, Rahmad; Zuhdi, Zuhdi
SEMIRATA 2015 Prosiding Bidang Fisika
Publisher : SEMIRATA 2015

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Material ferroelektrik Barium Strontium Titanat dengan komposisi Ba0,3Sr0,7TiO3 telah berhasil dideposit menggunakan metode kimia padatan. Sampel dicetak dalam bentuk pelet dan kemudian diannealing pada temperatur 600oC, 700oC dan 800oC. Karakterisasi pada sampel dilakukan menggunakan XRD. Hasil karakterisasi XRD dari sampel memperoleh data dan diolah dalam bentuk grafik hubungan antara intensitas terhadap sudut 2 theta. Pola difraksi XRD Ba0,3Sr0,7TiO3 diketahui memiliki beberapa puncak. Material Ba0,3Sr0,7TiO3 ini berbentuk kristalin dengan struktur kubus, dengan besar parameter kisi rata-rata adalah 3.961 Ã…. Ukuran partikel (D) dan regangan kisi (Î·) dari material Ba0,3Sr0,7TiO3 yang dieanealing pada suhu 600Â°C, 700Â°C dan 800Â°C selama 1 jam yaitu masing - masing sebesar 42,60 nm, 44,43 nm, 46,89 nm dan -4,49x 10-3, -4,05 x 10-3, -2,96 x 10-3. Semakin besar ukuran partikel, rata-rata regangan kisi (Î·) semakin besar seiring dengan meningkat suhu annealing. Kata Kunci: Karakterisasi XRD, anealling, ukuran partikel, regangan kisi

KARAKTERISASI FILM TIPIS FEROELEKTRIK ULTRAVIOLET VISIBEL Ba xSr1-xTiO3 DENGAN MENGGUNAKAN TEKNIK SOL-GEL Ali, Richiy Brantasona Safri Awang; Dewi, Rahmi; Usman, Zulkarnain
Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam Vol 2, No 1 (2015): Wisuda Februari 2015
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam

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The of BaxSr1 -xTiO3 (BST) solution preparation by using of sol-gel technique method has been done. The chemicals used were barium carbonate (BaCO3), strontium carbonate (SrCO3) and titanium oxide (TiO2) with composition x = 0.3; x = 0.2; x = 0.1 in the temperature anealing of 5000C, 5500C and 6000C for 20 minutes. The results obtained from this research is the absorbance spectrum. Samples Ba0,3Sr0,7TiO3, Ba0,2Sr0,8TiO3 and Ba0,1Sr0,9TiO3 at a temperature of 5000C have a wavelength of 438.5 nm and absorbance intensity of 0.1200 a.u. At a temperature of 5500C, the wavelength has 428 nm and absorbance intensity of 0.1261 a.u and at the temperature of 6000C, the wavelength has 435 nm and absorbance intensity of 0.1243 a.u. The greater the wavelength and temperature has the smaller the absorbance value is obtained.

FABRIKASI DAN KARAKTERISASI SIFAT OPTIK DARI Ba1-xSrxTiO3 MENGGUNAKAN SPEKTROFOTOMETER ULTRAVIOLET VISIBLE Yulitah, Detri; Dewi, Rahmi; ', Krisman
Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam Vol 2, No 1 (2015): Wisuda Februari 2015
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam

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The production of Ba1 -xSrxTiO3(BST) with composition x=0.1 0.2 and 0.3 with the difference temperature of 550, 600 and 650ÂºC on glass substrat with sol-gel method has been done succesfully. The aim of this research is to obtain the absorbancy and BST substance transmitancy with difference composition and temperature. The characterization was done by using Ultraviolet-Visible spectrophotometer. For composition x=0.1 the maximum absorbancy value on temperature 550, 600 dan 650ÂºC on each part are respectively 0.105a.u, 0.076a.u and 0.077a.u. For composition x=0.2 the maximum absorbancy value is 0.195a.u, 0.174a.u, and 0.132a.u. For composition x=0.3 the maximum absorbancy value is 0.316a.u, 0.147a.u and 0.108a.u. The maximum transmitancy value for x=0.1 on temperature 550, 600 and 650ÂºC on each part are respectively 97.9%, 97.7% and 96.6%, for composition x=0.2, each transmitancy value are 90.7%, 98.1% and 94.8%. Meanwhile for composition x=0.3 each transmitancy value is 88.5%, 80.3% and 93.7%. Those results indicate that the difference of temperature influences the absorbancy BST and the more composition of Srontium(Sr) is used, the bigger absorbancy is produced. For transmitancy value, BST is inversely proportional to absorbancy value.

KARAKTERISASI BAHAN FEROELEKTRIK BARIUM STRONTIUM TITANAT (Ba0,7 Sr0,3TiO3) MENGGUNAKAN MIKROSKOP IMBASAN ELEKTRON (SEM) Rizki, Befriana Ayu; Dewi, Rahmi; ', Sugianto
Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam Vol 1, No 2 (2014): Wisuda Oktober 2014
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam

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FerroelectricÂ of Ba0,7Sr0,3TiO3Â has been madeÂ fromÂ BaCO3Â (Barium Carbonat), SrCO3(Strontium Carbonat),Â and TiO2Â (Titanat Oksida)Â with variationÂ ofÂ calcination temperaturesÂ ofÂ 600oC, 700oC,Â and 800oC.Â Ferroelectric productÂ of Ba0,7Sr0,3TiO3Â was characterized by Scanning Electron Microscopy (SEM). SizesÂ of ferroelectric particle increasedÂ withÂ sinteringÂ temperatures,Â as followÂ 1,67Âµm, 2,27Âµm,Â and 2,38Âµm for samples with high temperatureÂ ofÂ 600oC, 700oC and 800oC. Respectively thenÂ the density of particle decreased withÂ temperature i.e 5,03x10-4 %, 4,40x10-4 %, and 1,52x10-4 %.Â The average value of resistance increasedÂ withÂ calcinationÂ temperatureÂ and sinteringÂ temperature of 400oC, 600oC, 700oC and 800Â°CÂ i.eÂ 6,716x108Î©, 6,740x108 Î©, 6,754x10 8 Î© and 6,768x108 Î©, as well as the value of the average resistivity increased withÂ riseÂ in calcinationÂ temperatureÂ and sintering temperatureÂ as follow 193,122x108 Î©m, 194,884x108 Î©m, 196,784x108 Î©m,Â and 198,882x108Î©m. TheseÂ were due to the effect of temperature on the arrangementÂ of the materialÂ atoms.Â It was concluded then the resistivity of a material does not depend on its geometric shape but depend on the temperature of the material.

FABRIKASI DAN KARAKTERISASI MATERIAL Ba DENGAN MENGGUNAKAN DIFRAKSI SINAR-X0.9 Sr 0.1 TiO 3 ', Nurmairanti; Dewi, Rahmi; Ginting, Mbantun
Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam Vol 2, No 1 (2015): Wisuda Februari 2015
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam

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This study is to determine the crystal structure of Ba0.9Sr0.1TiO3 with X-ray diffraction. The process of making the material Ba0.9Sr0.1TiO3 is mixing the powder material Barium Carbonate (BaCO3), Strontium Carbonate (SrCO3) and Titanium Dioxide (TiO2) which uses solid state reaction method with a ratio 0.9: 0.1: 1. Furthermore, the compounds are mixed and crushed using a mortal after it is heated at 4000C for 15 minutes and made the pellets by using Hydraulic Press. Pellets that have been made is heated for 1 hour with 600, 700 and 8000C and characterized using X-ray diffraction. The result is in the form of 2Ө angle as a function of intensity. The highest peak of the threesamples contained the hkl plane (1 1 0) at for 2Ө = 31.760 is 1045 (au) for temperature of 8000C,while the lowest peak contained the hkl plane (2 1 0) is the diffraction angle 2Ө = 51.240 with 113intensity (au) at a temperature of 6000C.

Karakterisasi Bahan Feroelektrik Strontium Titanat (Srtio3) Dengan Menggunakan X- Ray Diffraction Dewi, Rahmi; ', Krisman; ', Susilawati
Komunikasi Fisika Indonesia Vol 9, No 5 (2012)
Publisher : Universitas Riau

Ferroelectric material Strontium Carbonate (SrCO3) has been made with the comparison of 1:1 from chemicalreaction of Titanium Dioxide (TiO2). The pellet was anneled with the temperature of 700oC and thencharacterized using XRD. The XRD result of SrTiO3 after anneling showed some peaks, the positions of thepeaks on 2θ are 23.32°, 32.72°, 40.00o, 47.07o, 52.40°, 57.80o. After anneling, the peaks become wider, this meanthe samples become crystaline in structure. From the “a” value calculation “a” mean value obtained is 3,86 Å.Once the value of a calculated and a reference value obtained percentage error can be calculated that is 1.15%.

Effect of annealing temperature on the microstructure and morphology of BaZr0.45Ti0.55O3 thin films using the sol-gel method Rahmi Dewi; Wahyu Akbar Illahi; Tengku Said Luqman Hussain Shahab
Journal of Aceh Physics Society Volume 11, Number 2, April 2022
Publisher : PSI-Aceh

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24815/jacps.v11i2.22625

Abstrak. Ferroelektrik merupakan bahan elektronik khususnya dielektrik yang dapat diaplikasikan sebagai kapasitor. Ferroeletrik mempunyai kemampuan mengubah arah medan listrik internalnya dengan menggunakan medanl istrik yang sesuai. Barium titanat merupakan bahan yang bersifat ferroelektrik yang dapat didoping dengan bahan zirconium dan dapat dibuat dalam bentuk film tipis. Penambahan doping zirconium pada barium titanat akan meningkatkan konstanta dielektrik bahan. Pembuatan film tipis Barium Zirkoniun Titanat dengan komposisi (BaZr0.45Ti0.55O3) telah berhasil dibuat dengan menggunakan metode sol-gel. Variasi suhu annealing yaitu 600oC dan 650oC dengan waktu tahan 1 jam dan dikarakterisasi menggunakan difraksi sinar-X (XRD) dan scanning electron microscopy (SEM). Hasil karakterisasi XRD mendapatkan parameter kisi a = b = 3,97Ȧ danc = 4,25 Ȧ sehingga struktur kristalnya adalah tetragonal. Tingkat kekristalan semakin tinggi dengan bertambahnya suhu annealing yang ditandai dengan meningkatnya intensitas. Karakterisasi SEM menunjukkan pada suhu annealing 600oC ukuran butiran belum terlihat jelas sehingga tidak dapat ditentukan ukuran butirannya. Pada suhu 650oC ukuran butirannya dapat ditentukan dengan nilai ukuran butiran rata-ratanya adalah sekitar 134,5 nm. Abstract. Ferroelectric is an electronic material, the dielectric in particular, which can be applied as a capacitor. Ferroelectric is able to change the direction of its internal electric field by the use of a suitable electric field. Barium Titanate is a ferroelectric material which can be doped with zirconium and made in the form of a thin film. The addition of zirconium doping to Barium Titanate will increase the dielectric constant of the material. The making of Barium Zirconiun Titanate thin film with the composition (BaZr0,45Ti0,55O3) has been successfully prepared using the sol-gel method. The annealing temperature variations are 600oC and 650oC with a 1 hour holding time and characterized using X-ray diffraction (XRD) and scanning electron microscopy (SEM). The XRD characterization results obtain lattice parameters of a = b = 3.97 and c = 4.25 Ȧ, and thereby, the crystal structure is tetragonal. The crystallinity level is highly increasing with increased annealing temperature, indicated by increased intensity. SEM characterization shows that at annealing temperature of 600oC, the grain size is not clearly visible, so the grain size cannot be determined. At a temperature of 650oC, the grain size can be determined with the average grain size of about 134.5 nm.

Analysis of the effect of annealing rate on the thinness film of BaZr0.4Ti 0.6O3 at 800°C for 2 hours Tengku Said Hussain Shahab; Yanuar Hamzah; Zulkarnain Krisman; Ari Sulistyo Rini; Rahmi Dewi
Journal of Aceh Physics Society Volume 10, Number 1, January 2021
Publisher : PSI-Aceh

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24815/jacps.v10i1.17819

Abstrak. Ferroelektrik merupakan bahan yang mempunyai polarisasi spontan serta mempunyai kemampuan mengubah polarisasi internalnya dengan menggunakan medan listrik yang sesuai. Ferroelektrik juga diaplikasikan sebagai kapasitor. Material ferroelektrik buat dalam bentuk film tipis. Barium Zirconium Titanate (BZT) dengan komposisi BaZr0.4Ti0.6O3 dibuat menggunakan metode sol-gel. Substrat yang digunakan yaitu FTO yang telah di etching dan di lapisi BZT serta di annealing pada suhu 800°C selama 2 jam dengan kenaikan laju suhu annealing yaitu 5°C dan 10°C. Sampel di karakterisasi menggunakan XRD. Hasil karakterisasi XRD menunjukkan adanya puncak-puncak yang menandakan terdapat struktur kristal. Struktur kristal yang dihasilkan berada pada bidang 100 pada sudut 2θ = 22.78°, bidang 110 pada sudut 2θ = 32.17°, bidang 111 pada sudut 2θ = 38.42°, bidang 200 pada sudut 2θ = 47.73°. Struktur yang dihasilkan pada penelitian ini yaitu tetragonal dimana a = b = 3.91 nm dan c = 4.05 nm. Laju kenaikan suhu berpengaruh pada puncak Difraksi Sinar-X. Nilai FWHM untuk 5°C lebih kecil dari 10°C, ini menunjukan adanya kerapatan yang lebih besar saat di annealing dengan laju 5°C. Nilai ukuran kristal yang di dapat dengan kenaikan suhu 5°C dan 10°C pada bidang 100 yaitu 3.94 nm dan 3.22 nm. Ukuran kristal berbanding terbalik dengan nilai FWHM dimana laju kenaikan suhu annealing yang kecil menyebabkan ukuran kristal membesar. Abstract Ferroelectrics is a material that has spontaneous polarization and ability to change its internal polarization by using a suitable electric field. Ferroelectricsis also applied as a capacitor. The ferroelectric material is made in the form of a thin film. Barium Zirconium Titanate (BZT) with the composition BaZr0.4Ti 0.6O3 is prepared using the sol-gel method. The substrate used is FTO which has been etched and coated with BZT and annealed at a temperature of 800°C for 2 hours with a increase in the annealing temperature speed of 5°C and 10°C.Samples are characterized using XRD. The XRD characterization results show peaks indicating a crystal structure. The resulting crystal structure is in a plane 100 at an angle of 2θ = 22.78°, a plane 110 at an angle of 2θ = 32.17°, a plane 111 at an angle of 2θ = 38.42°, a plane 200 at an angle of 2θ = 47.73°. The resulting structure in this study is a tetragonal where a = b = 3.91 nm and c = 4.05 nm. The speed at which temperature increases has an effect on the peak of the X-Ray Diffraction.The FWHM value for 5°C is less than 10°C which indicates a greater density when annealed at a speed of 5 °C. The value of the crystal size obtained with an increase in temperature of 5°C and 10°C in the plane 100 is 3.94 nm and 3.22 nm. The crystal size is inversely proportional to the FWHM value where the small speed of the annealing temperature increase causes the crystal size to enlarge.Keywords: BaZr0.4Ti0.6O3 Thin Film, Speed of Annealing Temperature Increase, Sol-gel method, X-Ray Diffraction (XRD).

KARAKTERISASI KAPASITOR BARIUM STRONTIUM TITANAT (BST) Ba0,75 Sr0,25 TiO3 , YANG DIBUAT MENGGUNAKAN METODE SOL-GEL Rahmi Dewi; Tiara Pertiwi; Krisman Krisman
Komunikasi Fisika Indonesia Vol 16, No 1 (2019)
Publisher : Universitas Riau

The thin film of Barium Strontium Titanate (BST) has been studied withcomposition ofby using sol-gel method that annealed in temperature of 600oC and 650oC. The thin film of BST is characterized by using Field Emission Scanning Electron Microscopy (FESEM) and an impedance spectroscopy. The results of FESEM characterization for samples in temperature of 600oC and 650oC are 55.83 nm and 84.88 nm in thickness respectively. The result of impedance spectroscopy characterization given frequency values obtained by the impedance value of real and imaginary.The capacitance value at a frequency of 20 Hz from a thin film of BST in temperature of 600oC and 650oC are 69.36Fand138.70F. The dielectric constant of the thin film of BST in temperature of 600oC and 650oC are 22.17 dan 131.56 respectively.

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