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Teknik Karakterisasi Material

Teknik Karakterisasi Material. Tujuan Perkuliahan. Memberi pemahaman tentang prinsip dasar teknik karakterisasi material padat serta dasar-dasar interpretasinya. Undergraduate: Basic knowledge in all areas of chemistry Intro to problem solving and analytical thinking

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Teknik Karakterisasi Material

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  1. Teknik Karakterisasi Material A. Setiabudi

  2. Tujuan Perkuliahan • Memberi pemahaman tentang prinsip dasar teknik karakterisasi material padat serta dasar-dasar interpretasinya Undergraduate: • Basic knowledge in all areas of chemistry • Intro to problem solving and analytical thinking • Intro research experience • Exposure to modern instrumentation and theory • Exposure to interdisciplinary teams • Exposure to industry via internship • Become excited and stay excited about science A. Setiabudi

  3. Tujuan Karakterisasi Mateial Menentukan sifat fisika dan kimia (fisiko-kimia) • Mangetahui jenis zat (atom, molekul, senyawa) • Mengetahui struktur (Kristal, non kristal, ikatan) • Mengetahui kemurnian • Mofologi Permukaan • Sifat Termal • Sifat listrik A. Setiabudi

  4. Characterization of Inorganic Compounds • Carry out a new chemical reaction and isolate a new/known compound (organic, inorganic, or organometallic). • How do you know that your reaction has been successful or otherwise? • In other words, how would you characterize the compound that you have isolated? A. Setiabudi

  5. Common Questions to Ask • Does our material contains a known compound? • Is it pure? • What functional groups does it contain? • What is its composition and its molecular weight? • How the functional groups are linked to each other (connectivity)? • What is the molecular symmetry? • What are the bond lengths and angles? • What can we say about its electronic structure? A. Setiabudi

  6. Diagram Interaksi sebagai Dasar Katakteriasi Material kalor Ion Material elektron Foton neutron Medan Elehtromagnet A. Setiabudi

  7. Radiasi Elektromagnetik • Electromagnetic radiation X-ray, light, infra-red, microwave and radio waves are all e.m.r.’s, difference being their frequency thus the amount of energy they possess • Spectral region of e.m.r. A. Setiabudi

  8. Contoh Alur Berfikir dalam Karakterisasi Molekuler (stuktur nya milik molekul penyusun secara individu) Teknik Spektroskopy Analisa Kimia ? Material Padat Non molekuler (atom dan ion memmbentuk struktur tiga dimensinya) XRD dan/atau analisa kimia Non Kristalin Kristalin A. Setiabudi

  9. Klasifikasi Teknik Karakterisasi Material • Teknik Spektroskopy • Teknik Difraksi • Teknik Mikroskopy • Analisa Thermal A. Setiabudi

  10. Teknik Karakterisasi Material Padat A. Setiabudi

  11. Bahan Perkuliahan • Sifat Asam Basa Padatan • Spektroscopy IR untuk padatan • Teknik XRF • Teknik SEM dan TEM • Teknik TG-DTA • Teknik XRD • Penentuan Luas Permukaan Padatan A. Setiabudi

  12. Buku Sumber • Anthony R. West, Solid state chemistry and its applications, John Willey and Sons, New York (1989) • J.W. Niemansverdriet, Sepectroscopy in Catalysis, Willey-VCH, New York (2000) • Sumber-sumber di internet A. Setiabudi

  13. SEM A. Setiabudi

  14. Pengantar: SEM • Ceramic foam • Perbesaran 20x A. Setiabudi

  15. Pengantar: SEM • Ceramic foam • Perbesaran 5000x • Partikel dapat dilihat pada skala micron A. Setiabudi

  16. Thermogravimetric Analysis (TGA) • thermobalance allows for monitoring sample weight as a function of temperature • two most common instrument types • reflection • null • weight calibration using calibrated weights • temperature calibration based on ferromagnetic transition of Curie point standards (e.g., Ni) • larger sample masses, lower temperature gradients, and higher purge rates minimize undesirable buoyancy effects TG curve of calcium oxalate A. Setiabudi

  17. Dekomposisi Na3PO4 Reaksi Hasil; TGA • Perubahan-perubahan pada t < 850 0C serupa dg pemanasan Na3PO4 • Reaksi Na3PO4 dg ZrSiO4 kemungkinan terjadi pada suhu > 900 C Kurva TG-DTA pemanasan Campuran Na3PO4-ZrSiO4 A. Setiabudi

  18. A modern Diffractometer A. Setiabudi

  19. HasilXRD: Aditif Proses Pencampuran Tujuan: menambah homogenitas campuran pra-sintering Tidak ada perbedaan signifikan antara sampel yang dipreparasi dalam bentuk serbuk dan yang diberi tekanan 60 psi A. Setiabudi

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