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Journal : Lensa: Jurnal Kependidikan Fisika

Co-Precipitation Synthesis and Analysis of Co and Zn Doped Barium M-Hexaferrites Pangga, Dwi; Pathoni, Haerul; Suprianto, Suprianto
Lensa: Jurnal Kependidikan Fisika Vol 12, No 1: June 2024
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/j-lkf.v12i1.11732

Abstract

Barium hexaferrite (BaFe12O19) is a material of significant interest due to its wide range of applications. In this study, we synthesized barium M-hexaferrites (BaFe12-2xCoxZnxO19) powders through the co-precipitation method, starting from BaCO3 and FeCl3.6H2O powders, with Co and Zn powders used as dopant materials. The variations in x values were set at 0, 0.2, 0.4, 0.6, 0.8, and 1. Our findings indicate that the co-precipitation method is highly effective for synthesizing barium M-hexaferrites (BaFe12-2xCoxZnxO19) nanomaterials, which contain more than 89% iron elements and have an average particle size of 50 nm. The Differential Thermal Analysis (DTA) and Thermogravimetric Analysis (TGA) reveal that phase transformations occur at temperatures of 285°C and in the range of 750-840°C. Further analysis using the Rietveld refinement method demonstrates that the barium M-hexaferrite phase begins to form at relatively low temperatures, with the most optimal yield observed at x = 0.4. At temperatures exceeding 740°C, there is a tendency to form a single-phase α-Fe2O3 (hematite). The introduction of Co and Zn as dopant ions results in only minor changes to the lattice parameters of the basic hexagonal crystal structure. This comprehensive study underscores the viability of the co-precipitation method for producing high-quality barium M-hexaferrites and provides valuable insights into the effects of Co and Zn doping on the structural and thermal properties of these materials.
Implementasi Perangkat Pembelajaran PBL Terintegrasi STEM Berbasis Kearifan Lokal Kelintang Jolo untuk Meningkatkan Motivasi Belajar Siswa Tarigan, Susantri Br; Pathoni, Haerul; Nurhatmi, Jules
Lensa: Jurnal Kependidikan Fisika Vol 13, No 1: June 2025
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/j-lkf.v13i1.15514

Abstract

Penelitian ini bertujuan untuk menguji efektivitas perangkat pembelajaran Problem Based Learning (PBL) terintegrasi STEM berbasis kearifan lokal Kelintang Jolo untuk meningkatkan motivasi belajar siswa pada materi gelombang bunyi. Menggunakan desain quasi experiment nonequivalent control group pada siswa kelas XI SMAN 6 Kota Jambi, data dikumpulkan melalui angket motivasi belajar awal dan akhir dari kelas eksperimen dan kontrol. Hasil uji normalitas menunjukkan seluruh data terdistribusi normal dengan nilai signifikansi >0,05. Uji homogenitas menunjukkan data angket awal dan akhir homogen dengan nilai signifikansi masing-masing 0,319 dan 0,087. Hasil uji t berpasangan pada kelas eksperimen menunjukkan nilai signifikansi 0,000 dengan perbedaan rata-rata -14,286 antara pengukuran awal dan akhir, sementara kelas kontrol juga menunjukkan nilai signifikansi 0,000 dengan perbedaan rata-rata -11,47. Perbandingan peningkatan motivasi belajar antara kelas eksperimen membuktikan bahwa implementasi perangkat pembelajaran PBL terintegrasi STEM berbasis kearifan lokal lebih efektif dalam meningkatkan motivasi belajar siswa.
Implementation of STEM-Integrated Project-Based Learning Tools Based on Local Content (Jambi Coffee) to Improve Student Learning Outcomes Amanda, Putri; Pathoni, Haerul; Amnie, Erlida
Lensa: Jurnal Kependidikan Fisika Vol 13, No 1: June 2025
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/j-lkf.v13i1.16052

Abstract

This study aimed to investigate the effectiveness of Project-Based Learning (PjBL) tools integrated with STEM and local content—specifically the cultural practice of Jambi coffee brewing—in enhancing students’ learning outcomes in the physics topic of temperature and heat. The research employed a quasi-experimental method using a non-equivalent control group design. The participants were 11th-grade students from SMA Negeri 11 Muaro Jambi in the 2024/2025 academic year, selected through purposive sampling. A total of 54 students participated, divided evenly into two classes: the experimental class, which was taught using STEM-integrated PjBL tools incorporating local content, and the control class, which was taught using conventional PjBL tools without STEM or local context integration. Both groups underwent pretest and posttest assessments. Data were analyzed using paired sample t-tests and independent sample t-tests with a significance level of 0.05. The paired t-test results indicated a statistically significant improvement in both classes (p = 0.000). However, the independent sample t-test revealed a significant difference in posttest scores between the two groups (p = 0.011), with the experimental class showing greater gains. These results suggest that the integration of STEM and local cultural context into PjBL can deepen students’ conceptual understanding, enhance engagement, and improve learning outcomes more effectively than PjBL alone. The contextualization of physics content using familiar real-world practices, such as coffee brewing, provides meaningful learning experiences that connect abstract scientific concepts to students' daily lives.
Co-Precipitation Synthesis and Analysis of Co and Zn Doped Barium M-Hexaferrites Pangga, Dwi; Pathoni, Haerul; Suprianto, Suprianto
Lensa: Jurnal Kependidikan Fisika Vol. 12 No. 1: June 2024
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/j-lkf.v12i1.11732

Abstract

Barium hexaferrite (BaFe12O19) is a material of significant interest due to its wide range of applications. In this study, we synthesized barium M-hexaferrites (BaFe12-2xCoxZnxO19) powders through the co-precipitation method, starting from BaCO3 and FeCl3.6H2O powders, with Co and Zn powders used as dopant materials. The variations in x values were set at 0, 0.2, 0.4, 0.6, 0.8, and 1. Our findings indicate that the co-precipitation method is highly effective for synthesizing barium M-hexaferrites (BaFe12-2xCoxZnxO19) nanomaterials, which contain more than 89% iron elements and have an average particle size of 50 nm. The Differential Thermal Analysis (DTA) and Thermogravimetric Analysis (TGA) reveal that phase transformations occur at temperatures of 285°C and in the range of 750-840°C. Further analysis using the Rietveld refinement method demonstrates that the barium M-hexaferrite phase begins to form at relatively low temperatures, with the most optimal yield observed at x = 0.4. At temperatures exceeding 740°C, there is a tendency to form a single-phase α-Fe2O3 (hematite). The introduction of Co and Zn as dopant ions results in only minor changes to the lattice parameters of the basic hexagonal crystal structure. This comprehensive study underscores the viability of the co-precipitation method for producing high-quality barium M-hexaferrites and provides valuable insights into the effects of Co and Zn doping on the structural and thermal properties of these materials.
Implementasi Perangkat Pembelajaran PBL Terintegrasi STEM Berbasis Kearifan Lokal Kelintang Jolo untuk Meningkatkan Motivasi Belajar Siswa Tarigan, Susantri Br; Pathoni, Haerul; Nurhatmi, Jules
Lensa: Jurnal Kependidikan Fisika Vol. 13 No. 1: June 2025
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/j-lkf.v13i1.15514

Abstract

Penelitian ini bertujuan untuk menguji efektivitas perangkat pembelajaran Problem Based Learning (PBL) terintegrasi STEM berbasis kearifan lokal Kelintang Jolo untuk meningkatkan motivasi belajar siswa pada materi gelombang bunyi. Menggunakan desain quasi experiment nonequivalent control group pada siswa kelas XI SMAN 6 Kota Jambi, data dikumpulkan melalui angket motivasi belajar awal dan akhir dari kelas eksperimen dan kontrol. Hasil uji normalitas menunjukkan seluruh data terdistribusi normal dengan nilai signifikansi >0,05. Uji homogenitas menunjukkan data angket awal dan akhir homogen dengan nilai signifikansi masing-masing 0,319 dan 0,087. Hasil uji t berpasangan pada kelas eksperimen menunjukkan nilai signifikansi 0,000 dengan perbedaan rata-rata -14,286 antara pengukuran awal dan akhir, sementara kelas kontrol juga menunjukkan nilai signifikansi 0,000 dengan perbedaan rata-rata -11,47. Perbandingan peningkatan motivasi belajar antara kelas eksperimen membuktikan bahwa implementasi perangkat pembelajaran PBL terintegrasi STEM berbasis kearifan lokal lebih efektif dalam meningkatkan motivasi belajar siswa.
Implementation of STEM-Integrated Project-Based Learning Tools Based on Local Content (Jambi Coffee) to Improve Student Learning Outcomes Amanda, Putri; Pathoni, Haerul; Amnie, Erlida
Lensa: Jurnal Kependidikan Fisika Vol. 13 No. 1: June 2025
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/j-lkf.v13i1.16052

Abstract

This study aimed to investigate the effectiveness of Project-Based Learning (PjBL) tools integrated with STEM and local content—specifically the cultural practice of Jambi coffee brewing—in enhancing students’ learning outcomes in the physics topic of temperature and heat. The research employed a quasi-experimental method using a non-equivalent control group design. The participants were 11th-grade students from SMA Negeri 11 Muaro Jambi in the 2024/2025 academic year, selected through purposive sampling. A total of 54 students participated, divided evenly into two classes: the experimental class, which was taught using STEM-integrated PjBL tools incorporating local content, and the control class, which was taught using conventional PjBL tools without STEM or local context integration. Both groups underwent pretest and posttest assessments. Data were analyzed using paired sample t-tests and independent sample t-tests with a significance level of 0.05. The paired t-test results indicated a statistically significant improvement in both classes (p = 0.000). However, the independent sample t-test revealed a significant difference in posttest scores between the two groups (p = 0.011), with the experimental class showing greater gains. These results suggest that the integration of STEM and local cultural context into PjBL can deepen students’ conceptual understanding, enhance engagement, and improve learning outcomes more effectively than PjBL alone. The contextualization of physics content using familiar real-world practices, such as coffee brewing, provides meaningful learning experiences that connect abstract scientific concepts to students' daily lives.
Co-Authors -, Astalini -, Maison A.A. Ketut Agung Cahyawan W Abdul Manab Aldila, Febri Tia Alrizal Alrizal , Alrizal Alrizal Alrizal Alrizal Alrizal Alrizal, Alrizal Amanda, Putri Andre Rabiula Annisak, Wiricha Ashar, Rayandra Astalini Astalini Astalini, Astalini Aulia Eka Putra Ayu Wanda Bambang Hariyadi Br Sinuraya, Wina Tiodora Chatarina Umbul Wahyuni Darmaji Darmaji dasrinal tesal Dewi, Difa Jefri Oktifia Dwi Agus Kurniawan Dwi Agus Kurniawan Dwi Febriyanti Dwijayanti, Esti Erlida Amnie Estianinur, Estianinur F B Pujaningsih Fadhillah, Nanda Febri Berthalita Pujaningsih Fibrika Rahmat Basuki Firdaus Firdaus Firdiansyah, Firdiansyah Hebat Shidow Falah Hendri, Menza Hidayati Hidayati Hikmah Syiarah Idris, Kemal Ika Saputri Islahudin Johri Sabaryati Johri Sabaryati, Johri Jufrida Jufrida Jules Nurhatmi Kemal Idris Kinanti Eka Putri Kurnia, Nila Kurniawan, Dwi Agus Kurniawan, Dwi Agus Kurniawan, Nugroho Lois Kusumawati Setiawan Louisiana Muliawati Louisiana Muliawati M Hendri M Hidayat M Nuklirullah Masyithah, Deby Claudia Mayang Dela Kesumah Muhammad Akbar Pisnaji Muhammad Haris Effendi Hasibuan Muliawati, Louisiana Musyaddad, Muhammad Nanya Aprillia Nehru Nehru Nizlel Huda Nova Susanti Nova Susanti Nugroho Kurniawan Nurung, Muhamamad Pangga, Dwi Perdana, Rahmat Qistimahami, Qistimahami Qodariah Barkah Rachel Risda Sitanggang Raden Maulana Rasmi, Dian Pratiwi Rayandra Ashar Retty Miraza Riska Fitriani Samratul Fuady Saputra, Bemie Eka Saputri, Ika Siahaan, Anggrek Adewina Siti Khaerani Sri Purwaningsih Sri Purwaningsih Suprianto Suprianto Sutri, Sutri Tari, Tari Tarigan, Susantri Br Tias, Dini Maryuning Umirza Fadjar Arpan Wawan Kurniawan Wella Meliza Wulan Sari Wulan Sari, Wulan Yosi Riduas Hais Zen, Fadhila Zilfa Zulkarnain, Zulkarnain