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KARAKTERISTIK FREKUENSI RESONANSI DAN OUTPUT POWER KERAMIK Mg(Ti0,98Cr0,02)O3 SEBAGAI MATERIAL RESONATOR PADA MODUL DIELECTRIC RESONATOR OSCILLATOR (DRO): Kata Kunci: Keramik MTC002, frekuensi resonansi, output power, dan DRO. Lestari, Emilia Dwi; Ermawati, Frida Ulfah; Taryana, Yana; Sulaiman, Yaya; Sukoco, Bagus Edi; Sudrajat, Nanang
Inovasi Fisika Indonesia Vol. 13 No. 2 (2024): Vol 13 No 2
Publisher : Prodi Fisika FMIPA Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/ifi.v13n2.p119-127

Abstract

Magnesium titanate (MgTiO3) merupakan salah satu material dielectric resonator (DR) yang potensial untuk diaplikasikan pada berbagai sistem telekomunikasi, salah satunya sebagai komponen pembangkit frekuensi resonansi pada modul dielectric resonator oscillator (DRO) untuk aplikasi sistem radar. Terkait hal tersebut, makalah ini melaporkan karakteristik frekuensi resonansi dan output power keramik Mg(Ti0,98Cr0,02)O3 (disingkat MTC002) ketika keramik tersebut diujicobakan sebagai resonator pada modul DRO. Keramik dikompaksi menggunakan uniaxial-cylindrical-die press berdiameter 8 mm dan hydraulic-handpress pada tekanan 10 MPa, serta disinter pada suhu 1200 °C selama 4 jam. Tujuannya adalah untuk mengkaji karakteristik frekuensi resonansi DRO dan output power keramik serta mengkaitkannya dengan data struktur, mikrostruktur, dan permitivitas relatif. Resonansi DRO terdeteksi pada frekuensi 3,352 GHz dengan output power +3,848 dBm. Keramik ini mengandung MgTiO3 sebagai fasa utama (81,38 %molar) dan sisanya TiO2 rutile tanpa disertai fasa sekunder MgTi2O5 atau Mg2TiO4. Permukaan keramik tampak padat dengan nilai densitas bulk 3,056 g/cm3 . Selain itu, keberadaan fasa MgTiO3 tersebut dikonfirmasi oleh data EDX yang hanya mengandung unsur Mg, Ti, Cr, dan O dengan rasio %atom masing-masing 17,608; 17,831; 0,263; dan 64,298 %. Sementara nilai rata-rata ɛr keramik yang diukur pada rentang frekuensi 2-4 GHz adalah 17,40. Hasil-hasil di atas menunjukkan bahwa keramik MTC002 memiliki sifat dielektrik (Er) yang mendukung untuk diaplikasikan sebagai material resonator pada DRO, khususnya daerah S-band (2-4 GHz). Kata Kunci: Keramik MTC002, frekuensi resonansi, output power, dan DRO. Abstract Magnesium titanate (MgTiO3) is a resonator (DR) dielectric material that has the potential to be applied in various telecommunications systems, one of which is as a resonant frequency generator component in the dielectric resonator oscillator (DRO) module for radar system applications. In this regard, this paper reports the characteristics of the resonance frequency and output power of Mg(Ti0.98Cr0.02)O3 ceramic (abbreviated as MTC002) when the ceramic was tested as a resonator in the DRO module. The ceramics were compacted using a uniaxial-cylindrical-die press with a diameter of 8 mm and a hydraulic-hand-press at a pressure of 10 MPa, and sintered at a temperature of 1200 °C for 4 hours. The aim is to study the characteristics of the DRO resonance frequency and power output of ceramics and relate them to data structure, microstructure and relative permittivity. DRO resonance was detected at a frequency of 3.352 GHz with an output power of +3.848 dBm. This ceramic contains MgTiO3 as the main phase (81.38% molar) and the remainder is rutile TiO2 without the secondary phase MgTi2O5 or Mg2TiO4. The ceramic surface appears solid with a bulk density value of 3.056 g/cm3 . In addition, the existence of the MgTiO3 phase was confirmed by EDX data which only contains the elements Mg, Ti, Cr, and O with an atomic % ratio of 17.608; each 17.831; 0.263; and 64.298 %. Meanwhile, the average value for ceramics measured in the 2-4 GHz frequency range is 17.40. The results above show that MTC002 ceramic has dielectric properties (Er) that support its application as a resonator material in DRO, especially the S-band region (2-4 GHz). Keywords: MTC002 ceramic, resonant frequency, output power, and DRO.
Socialization and Training on Processing LDPE (Low-Density Polypropylene) Plastic Waste into Paving Blocks Agustinur, Satya Cantika; Basmalah, Mazaya; Novianti, Eni; Lestari, Emilia Dwi; Martila, Lenny Intan; Putri, Rahadian Dwi Oktavia; Yantidewi, Meta; Deta, Utama Alan
International Journal of Research and Community Empowerment Vol. 1 No. 1 (2023): Febuary 2023
Publisher : Mitra Edukasi dan Publikasi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58706/ijorce.v1n1.p14-21

Abstract

The increasing amount of waste in Indonesia, especially in Surabaya, is a severe problem that must be resolved immediately. The amount of plastic waste in the city of Surabaya is one of the causes of damage to the environment. So that the plastic waste must be processed so that it can be reduced. Surabaya State University KKN students made this problem the basis for implementing the Socialization and Training of Plastic Waste Processing Types of LDPE (Low-Density Polypropylene) into Paving Blocks. The purpose of this activity is as an effort to reduce the amount of plastic waste and provide alternative new jobs for the community. This activity applies the lecture method, question and answer, simulation and practice. The action begins with the opening and filling out of the pre-test, then continues with filling in the material, making simulations, and the activity ends with closing and filling in the post-test. The pre-test and post-test assessments results showed that the participant's knowledge of the material was still classified as "low" with an average pre-test score of 52.40% and an increase in knowledge of the material as indicated by the post-test average score of 87 .27%. The activity concludes that participants experience an increase in knowledge and understanding of handling plastic waste into paving blocks and have knowledge about tools, materials, and processing methods to be applied in everyday life.