Article Per Year (5 Year)
p-Index From 2020 - 2025
0.408
P-Index
This Author published in this journals
All Journal Jurnal Ilmu Fisika UPEJ Unnes Physics Education Journal
Izza, Lailatul
Unknown Affiliation
Astronomy Earth & Planetary Sciences Education Materials Science & Nanotechnology Physics

Published : 2 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 2 Documents
Search

 1 
Characterization of (Mg1.0Zn0.0)TiO3+4 wt%Bi2O3 Ceramics for Application as Resonator in Dielectric Resonator Oscillator Circuit Izza, Lailatul; Ermawati, Frida Ulfah
Jurnal Ilmu Fisika Vol 13, No 2 (2021): Published in September 2021 (COMING ISSUE)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jif.13.2.62-69.2021

Abstract

MgTiO3-based ceramics have potential applications in telecommunications systems at microwave frequencies, such as resonators in dielectric resonator oscillator (DRO) circuits. This paper reports the results of (Mg1.0Zn0.0)TiO3+4wt% Bi2O3 (abbreviated MZT0+4wt%Bi2O3) ceramic fabrication to assess its potential to be used as a resonator in the DRO circuit. We characterized its structure, microstructure, and bulk density. The addition of 4wt%Bi2O3 to MZT0 crystalline powder was carried out via ball-mill. The milled powder was compacted using a die press to obtain pellets. All pellets were sintered at 1100ºC for 4, 6, and 8 h. Ceramic structures of the 4 and 6 h holding time consists of MgTiO3 phase (94.33±2.68) and (95.34±1.95)% molar respectively, while the rest phase was TiO2. The 8-h ceramic structure comprises (96.11±2.94) % molar MgTiO3 accompanied by Mg2TiO5 and TiO2. The ceramics' microstructure consists of a cluster of grains with an average diameter of 1.32-2.24 μm and pores. Bulk density decreases with the increase of sintering holding time. The DRO characterization records a resonance signal each at 5.207, 5.005, and 5.121GHz with power approaching 0 dBm, suggesting that the MZT0+4wt%Bi2O3 ceramics can be used as a resonator in the DRO circuit working in microwave frequencies, especially at 5.0-5.2GHz.
Kemandirian Belajar Siswa dalam Pembelajaran Daring Berbantuan E-Modul Berbasis STEM (Science, Technology, Engineering, and Mathematics) Ditinjau dari Hasil Belajar Kognitif Izza, Lailatul; Hartono, Hartono
UPEJ Unnes Physics Education Journal Vol 10 No 2 (2021)
Publisher : UPEJ Unnes Physics Education Journal

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/upej.v10i2.54189

Abstract

The spread of the Covid-19 pandemic in Indonesia has caused the learning process to be carried out from home and students are required to be able to carry out the learning process independently. Based on these problems, teaching materials are needed that can help students learn independently, one of them is by using e-modules based STEM. This study aims to analyze differences in student learning outcomes in online learning assisted by e-modules based STEM and online learning assisted by modules from schools dan analyze differences in student learning independence in online learning assisted by e-modules based STEM in terms of cognitive learning outcomes. The research was conducted at SMA Negeri 2 Demak. This research is an experimental research with Nonequivalent control group design. The subjects in this study were students of class XI MIPA 1 and XI MIPA 2. Data collection methods used were documentation, questionnaires and tests. The data analysis technique used includes normality test, homogeneity test, one way ANOVA test and t test. Based on the results of the study, it shows that there are differences in student learning outcomes in online learning assisted by e-modules based STEM and online learning assisted by modules from schools and there are differences in student learning independences in online learning assisted by e-modules based on STEM in terms of cognitive learning outcomes.
Co-Authors Frida Ulfah Ermawati Hartono Hartono