KARAKTERISTIK BATUBARA TERPENGARUH INTRUSI DI TAMBANG AIR LAYA, SUMATRA SELATAN DAN POTENSINYA SEBAGAI MATERIAL UNTUK PEMBUATAN GRAFIT SINTETIS

Grafit dapat diaplikasikan dalam berbagai macam kegunaan misal sebagai material tahan panas, baterai, dan elektroda. Material grafit bisa didapat melalui grafit sintetis yang berasal dari batubara antrasit yang terpanaskan pada suhu di atas 2000ºC. Kondisi batubara yang terpanaskan secara alami dapat ditemui pada batubara yang terpengaruh intrusi batuan beku di Tambang Air Laya (TAL), Tanjung Enim, Sumatra Selatan. Penelitian ini bertujuan untuk mengetahui karakteristik batubara terpengaruh intrusi batuan beku dan potensinya sebagai material untuk pembentukan grafit sintetis. Empat sampel batubara yang berasal dari 4 seam dengan jarak bervariasi terhadap intrusi diambil dan dipreparasi untuk dilakukan analisis sayatan poles, random vitrinite reflectance (Rvr), proksimat, X-Ray Diffractometry (XRD), Total Carbon (TC), Total Organic Carbon (TOC), Total Inorganic Carbon (TIC), serta analisis micro-Raman spectroscopy. Batubara terpengaruh intrusi batuan beku di lokasi penelitian mengalami kenaikan vitrinite reflectance dan kandungan fixed carbon (karbon tertambat) serta penurunan nilai moisture (kadar lengas) dan volatile matter (zat terbang) seiring berkurangnya jarak terhadap tubuh intrusi. Batubara seam A1 berperingkat low volatile bituminous coal (%Ro= 2,01%) yang memiliki jarak terdekat dengan tubuh intrusi memiliki derajat pembatubaraan dan kandungan presentase mineral tertinggi. Batubara seam A1 memiliki banyak asosiasi mineral lempung yang dijumpai seperti ilit, smektit, dan rektorit sehingga dapat meningkatkan derajat kristalinitas dalam proses pembatubaraan dan akan mempermudah pada proses pembentukan grafit sintesis dalam proses selanjutnya.

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Use of WetSEM® capsules for convenient multimodal scanning electron microscopy, energy dispersive X-ray analysis, and micro Raman spectroscopy characterisation of technetium oxides

Journal of Radioanalytical and Nuclear Chemistry ◽

10.1007/s10967-021-07737-5 ◽

2021 ◽

Author(s):

D. J. Bailey ◽

M. C. Stennett ◽

J. Heo ◽

N. C. Hyatt

Keyword(s):

Raman Spectroscopy ◽

Low Cost ◽

Powder Materials ◽

Spectroscopy Analysis ◽

X Ray ◽

Micro Raman Spectroscopy ◽

Hazard And Risk ◽

Sem Imaging ◽

General User ◽

532 Nm

AbstractSEM–EDX and Raman spectroscopy analysis of radioactive compounds is often restricted to dedicated instrumentation, within radiological working areas, to manage the hazard and risk of contamination. Here, we demonstrate application of WetSEM® capsules for containment of technetium powder materials, enabling routine multimodal characterisation with general user instrumentation, outside of a controlled radiological working area. The electron transparent membrane of WetSEM® capsules enables SEM imaging of submicron non-conducting technetium powders and acquisition of Tc Lα X-ray emission, using a low cost desktop SEM–EDX system, as well as acquisition of good quality μ-Raman spectra using a 532 nm laser.

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PERBANDINGAN NILAI BAKAR BRIKET BATUBARA DAN BRIKET ARANG (CAMPURAN CANGKANG BINTARO (Cerbera Manghas) DAN BAMBU BETUNG (Dendrocalamus Asper)

TEKNIKA: Jurnal Teknik ◽

10.35449/teknika.v6i1.99 ◽

2019 ◽

Vol 6 (1) ◽

pp. 1

Author(s):

Ida Febriana ◽

Zurohaina Zurohaina ◽

Sahrul Effendy

Keyword(s):

Alternative Energy ◽

Bituminous Coal ◽

Raw Materials ◽

Calorific Value ◽

Volatile Matter ◽

Carbonization Temperature ◽

Fixed Carbon ◽

Alternative Energy Source ◽

Tapioca Flour ◽

Cerbera Manghas

Charcoal briquettes are smokeless fuels which are a type of solid fuel whose fly substance is made low enough so that the smoke generated on its utilization will not interfere with health. In this study charcoal briquettes were made from bintaro shell waste and betung bamboo using tapioca flour adhesives. This study aims to obtain the best quality sub-bituminous coal briquettes and coal briquettes. In this study the carbonization temperature used was 400ᵒC and the composition of raw materials for bintaro shells and betung bamboo was 50:50, the composition of raw materials for sub-bituminous coal and straw 90:10. The method used in this research is experiment or experimental method, with fuel value collection using ASTM D5865-03 standard. The results obtained from this study are for charcoal briquettes with 4000C carbonization temperature Inherent Moisture value of 1.91%, ash 2.29%, volatile matter 23.79%, fixed carbon 72.01% and calorific value 5878.7 kal / gr, and for coal briquettes obtained value Inherent Moisture 0.52%, ash 4.42%, volatile matter 17.98%, fixed carbon 77.08% and calorific value 7152.6 kal / gr. The fuel value of coal briquettes is greater than that of charcoal briquettes, but the combustion value of charcoal briquettes includes a good calorific value as an alternative energy source, and is in accordance with the SNI standard of 5000 kal / gr, even close to the Japanese standard 6000 cal / gr. Keywords: Bintaro, briquette, calorific value

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Phase characterisation of TiO/sub 2/ thin films using micro-Raman spectroscopy and glancing angle X-ray diffraction

2002 Conference on Optoelectronic and Microelectronic Materials and Devices. COMMAD 2002. Proceedings (Cat. No.02EX601) ◽

10.1109/commad.2002.1237222 ◽

2005 ◽

Cited By ~ 1

Author(s):

J. Hugmann ◽

B.S. Richards ◽

A. Crosky

Keyword(s):

Thin Films ◽

Raman Spectroscopy ◽

X Ray Diffraction ◽

X Ray ◽

Micro Raman Spectroscopy ◽

Glancing Angle

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Combined synchrotron x-ray diffraction and micro-Raman for following in situ the growth of solution-deposited YBa2Cu3O7 thin films

Journal of Materials Research ◽

10.1557/jmr.2005.0421 ◽

2005 ◽

Vol 20 (12) ◽

pp. 3270-3273 ◽

Cited By ~ 3

Author(s):

F. Berberich ◽

H. Graafsma ◽

B. Rousseau ◽

A. Canizares ◽

R. Ramy Ratiarison ◽

...

Keyword(s):

Raman Spectroscopy ◽

X Ray Diffraction ◽

X Ray ◽

Additional Information ◽

Micro Raman Spectroscopy ◽

High Temperature Process ◽

Structural Growth ◽

Metal Organic ◽

Insight Into

A unique combination of in situ synchrotron x-ray diffraction and in situ micro-Raman spectroscopy was used to study the growth process of YBa2Cu3O6+x films obtained by metal organic decomposition using trifluoroacetate precursor on LaAlO3 substrates. The techniques give complementary information: x-ray diffraction gives insight into the structural growth, whereas micro-Raman spectroscopy gives information of the chemical composition with additional information on the texture. To perform both experiments in situ, a special high-temperature process chamber was designed.

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Enhanced yield strength in iron nanocomposite with in situ grown single-wall carbon nanotubes

Journal of Materials Research ◽

10.1557/jmr.2006.0061 ◽

2006 ◽

Vol 21 (2) ◽

pp. 522-528 ◽

Cited By ~ 13

Author(s):

A. Goyal ◽

D.A. Wiegand ◽

F.J. Owens ◽

Z. Iqbal

Keyword(s):

Carbon Nanotubes ◽

Raman Spectroscopy ◽

Yield Strength ◽

Vapor Deposition ◽

Single Wall Carbon Nanotubes ◽

Iron Matrix ◽

Single Wall Carbon ◽

X Ray ◽

Micro Raman Spectroscopy

The yield strength of iron-carbon nanotube composites fabricated by in situ chemical vapor deposition of 2.2 vol% single-wall carbon nanotubes (SWNTs) inside an iron matrix showed substantial enhancement up to 45%, relative to that of similarly treated pure iron samples without carbon nanotubes of the same piece density. The work hardening coefficient and the Vickers hardness coefficient also significantly increased in these composites relative to the reference samples. X-ray diffraction together with energy dispersive x-ray measurements and micro-Raman spectroscopy indicated no concomitant formation of carbides and very little amorphous carbon during the vapor deposition process. Micro-Raman spectroscopy and scanning and transmission electron microscopy showed spectral signatures and images, respectively, indicating the formation and dispersion of SWNTs within the cavities of the iron matrix. It is suggested that the increased strength of the nanocomposites was due to the mechanical support provided to these cavities by the extremely strong SWNTs.

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Metal Deposition on Laser Modified Teflon Surfaces

MRS Proceedings ◽

10.1557/proc-385-239 ◽

1995 ◽

Vol 385 ◽

Cited By ~ 3

Author(s):

Stefan Lätsch ◽

Hiroyuki Hiraoka ◽

Joachim Bargon

Keyword(s):

Raman Spectroscopy ◽

Photoelectron Spectroscopy ◽

Deposition Process ◽

Metal Deposition ◽

Polymer Surfaces ◽

Good Adhesion ◽

X Ray ◽

Micro Raman Spectroscopy ◽

Polymer Adhesion ◽

Secondary Ion

ABSTRACTCu, Ni, and Au were deposited with defined patterns and good adhesion by electroless plating, e-beam evaporation, and sputtering onto Teflon (polytetrafluoroethylene, PTFE), Teflon ET (PTFE-co-ethylene), Teflon FEP (PTFE-co-hexafluoropropylene) and Teflon PFA (PTFE-coperfluoroalkoxy vinyl ether) surfaces. The polymers had been irradiated in a tetramethyl – ammonium hydoxide solution (TMAH) by a Nd:YAG laser at 266 rim and by an excimer laser at 248 nrm prior to the metal deposition process. Both, the treated and virgin polymer surfaces were characterized by x-ray photoelectron spectroscopy (XPS), secondary ion mass spectroscopy (SIMS) and Micro-Raman spectroscopy. The increased metal to polymer adhesion at the interface was found to be due to chemical changes and is in the order Ni > Cu ≅ Au.

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