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All Journal INDONESIAN JOURNAL OF APPLIED PHYSICS
Yofentina iriani
Sebelas Maret University
Astronomy Energy Materials Science & Nanotechnology Physics

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Pengaruh Suhu Sintering Pada Pembuatan Strontium Titanat (SrTiO3) Terhadap Konstanta Dielektrik Menggunakan Metode Co-Precipitation Husnah Rofiko; Yofentina iriani; Risa Suryana
INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 7, No 1 (2017): April
Publisher : Department of Physics, Sebelas Maret University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/ijap.v7i1.1778

Abstract

Strontium Titanate (SrTiO3) with variation of sintering temperatures were prepared by co-precipitation methods. Sintering temperature were varied at 700oC, 800oC, and 900oC for 4 hours. SrTiO3 samples were prepared by Strontium Nitrate and Titanium Tetrabutoxide. SrTiO3 samples were characterized by X-Ray Diffraction (XRD), Scanning Electron Microscopy (SEM), Resistance Capacitance Inductance (RCL) meter, and Sawyer Tower.  SEM images show that the sintering temperatures could affect the grain size of SrTiO3. In addition, crystal size of SrTiO3 (110) affected by sintering temperature. The highest of dielectric constant is 137 on SrTiO3 at sintering temperature of 900oC. Sawyer Tower curves confirmed that SrTiO3 has paraelectric property.Keyword: Strontium Titanate, Co-precipitation, dielectrics constant, paraelectrics 
Pembuatan Ba0,8Sr0,2TiO3 menggunakan Metode Co-precipitation dengan Variasi Suhu Sintering Isma Alvia Nita; Yofentina Iriani; Fahru Nurosyid
INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 7, No 1 (2017): April
Publisher : Department of Physics, Sebelas Maret University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/ijap.v7i1.1776

Abstract

Ba0,8Sr0,2TiO3 was made by co-precipitation method with the sintering temperature of 600oC, 700oC, 800oC and 900oC for 4 hours. Sintering temperature was varied to investigate its effect on microstructure and dielectric constant of Ba0,8Sr0,2TiO3. microstructure characterization was performed by X-Ray Diffraction (XRD) instrument. Dielectric constant characterization was perform by LCR meter. The crystal size increased significantly with increasing sintering temperature. Measurements of dielectric constant were performed at range of frequency 0.01 to 100 KHz. Dielectric constant value is highest at the lowest frequency. Dielectric constant value size increased significantly with increasing sintering temperature.
Influence of High Sr2+ Substitution on the Structure and Photocatalytic Activity of Ba1‑XSrxTio3 for Dye Degradation Dianisa Khoirum Sandi; Trya Andini; Fahru Nurosyid; Yofentina Iriani
INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 15, No 2 (2025): October
Publisher : Department of Physics, Sebelas Maret University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/ijap.v15i2.107609

Abstract

Barium strontium titanate or BST (Ba1-xSrxTiO3) photocatalysts with distinct Sr substitutions (x = 0.5, 0.6, 0.7, and 0.8) were fabricated using the co-precipitation technique. This study aimed to investigate the influence of the high Sr2+ contents on the structural property and photocatalytic activity to identify the optimal composition. X-ray diffraction (XRD analysis) confirmed cubic BST formation at all Sr concentrations and reduced lattice constants with increasing Sr²⁺ contents. Fourier transform infra-red (FTIR) investigation also validated the formation of the prepared BST with different Sr contents. The photocatalytic activity of the BST photocatalysts was evaluated by the degradation of methylene blue (MB) under UV light irradiation. Notably, the photocatalytic efficiency improved at x=0.5 to x=0.7, attributed to enhanced lattice distortion induced by Sr substitution. However, a further increase of x = 0.8 resulted in reduced photocatalytic activity, likely due to the formation of a more symmetric structure and reduced crystal distortion. Ba₀.₃Sr₀.₇TiO₃ exhibited the highest degradation rate (41%) among all samples tested. The results suggest that the high Sr level critically affects the structural properties and photocatalytic efficiency of BST and underline x = 0.7 as the optimal composition for photocatalytic applications.
Co-Authors Dianisa Khoirum Sandi Fahru Nurosyid Husnah Rofiko Isma Alvia Nita Risa Suryana Trya Andini