Materials Literature
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Pipeline memegang peranan penting dalam sistem distribusi dan transmisi fluida. Kondisi pipa harus dalam keadaan ready dan safe saat beroperasi. Beberapa kondisi lingkungan yang dapat mengganggu kerja sistem salah satunya adalah korosi pada pipeline diakibatkan karena kondisi lingkungan dan fluida yang dialirkan. Pada…
Peranan boiler sangat penting pada pembangkitan listrik di PLTU. Variabel proses yang tidak sesuai standard dapat menyebabkan terjadinya kerusakan. Kerusakan pada rangkaian tube water wall boiler PLTU berupa retak, bulging (bengkak) dan kerusakan lainya. Untuk mengetahui lebih lanjut tentang penyebab kegagalan maka, d…
Kegagalan air heater PT PJB UP Gresik Unit 1 terjadi karena serangan korosi oleh sulfur pada elemen pemanas bagian cold end layer sehingga menyebabkan tersumbatnya saluran udara oleh produk korosi dan deposit lain. Serangan korosi oleh sulfur disebabkan karena penggunaan bahan bakar boiler menggunakan minyak residu ya…
Laser-induced breakdown spectroscopy (LIBS) in cavitation bubbles is an analytical method to determine dissolved heavy metals at concentrations down to µg/L. The method has been applied to samples of chromium, manganese, palladium, and indium. Quantitative trace analysis has been achieved down to a limit of detection…
Permasalahan mengenai pengecatan sering ditemukan pada proses perbaikan kapal di PT PAL.Permasalahan tersebut meliputi kegagalan pengecatan. Pemecahan masalah pada pengecatan dapat meningkatkan efisiensi galangan. Chalking sering terjadi pada pengecatan saat perbaikan kapal.Proses pengecatan dengan prosedur yang benar…
Τα εμπορικά λογισμικά υπολογιστικών φαινομένων μεταφοράς (Fluent, Comsol κλπ), παρόλη την ευελιξία και τις δυνατότητές τους για ανάλυση πολύπλοκων προβλημάτων, αδυνατούν να αντιμετωπίσουν αποτελεσματικά συγκεκριμένα υπολογιστικά προβλήματα που οφείλονται στη μη γραμμικότητα των εξισώσεων που επιλύουν. Συγκεκριμένα, ότ…
One of de most important environmental problems nowadays is the abatement of NOx emissions. NOx are involved in photochemical reactions that produce smog and acid rain, and (together with CO2, CH4 and H2O), take part in the greenhouse effect. One of the most efficient ways to reduce NOx emissions is Selective Catalyti…
Druckverlustdaten korreliert, so dass in Zukunft Wrmebergangskoeffizienten aus Druckverlustexperimenten bestimmt werden knnen (Wrme-Impuls-Analogie).
Bicyclo(2,2,2)oct-7-ene-2,3,5,6-tetracarboxylic dianhydride(BTDA)와 1,3-bis(3-aminophenoxy)benzene(BAPB) 단량체를 사용하여 중합한 폴리아믹산(poly(amic acid))에 용액 삽입법을 이용해서 다양한 함량의 유기화 점토를 넣은 후 열 이미드화 방법을 통해 투명한 나노복합체 polyimide(PI) 필름을 합성하였다. 0-1.5 wt%의 다양한 함량의 유기화점토를 포함하는 복합체 필름을 제조한 후, 필름의 광 투과성, 모폴로지, 그리고 가스차단성을 각각 측정하였다. 1.0 wt%의 C…
The thermal decomposition of indium phosphide has been investigated by Auger-electron spectroscopy and mass-spectroscopy. Scanning electron microscopy has been used for study of indium islands growth on surface of the compound semiconductor. The role of atomic hydrogen in processes of decomposition and growth of metal…
Material yang ringan dan kuat menjadi syarat utama sebagai komponen-komponen otomotif, persenjataan, bahkan peralatan ruang angkasa. Oleh karena itu penelitian tentang material ringan terus-menerus di lakukan oleh masyarakat. Salah satu material yang menjanjikan adalah Metal Matrix composite (MMC) yang berbasis magnes…
List of Figures x List of Tables x List of Figures 3.1 The schematic illustration of the pseudoelectron (dashed lines) and the allelectron (solid lines) potentials and their corresponding wavefunctions.R c is the radius at which the all-electron and pseudoelectron value match. . . . . .32 5.1 Crystal structures of the…
S.1179
Abstract Ultra‐thin SiGe‐on‐insulator (SGOI and GOI)materials with various Ge concentrations were fabricated by oxidation of SiGe on SOI substrate, in which Si was oxidized and Ge was confined between the two oxide layers. The SGOI (GOI) materials were systematically characterized with double‐crystal X‐ray diffraction…
Advanced functionalized materials become progressively vital to our everyday life and indispensable to industrial engineering, energy supply and sustainability, healthcare, environment as well as l...
Kinetik ergibt ein ortsabhngiges Modell des Pellet-String-Reaktors
Mikroreaktionssystem erlaubt auch die Herstellung von Teilchen mit verschiedenen Morphologien wie z.B. Stäbchen, verzweigte Strukturen oder auch Kern-(Multi-)Schale-Teilchen.Diese Beispiele zeigen die universellen Eigenschaften der Mikroreaktionstechnologie, die ideal zur Herstellung von hochspezialisierten Teilchen w…
이미드/아라미드/설폰기가 교대로 도입된 poly(imide-aramid-sulfone)s을 divinyl sulfone(DVS)과 $N^1,N^4$ -bis(4-(vinylsulfonyl)phenyl)terephthalamide (2)를 pyromellitic diimide와 반응하여 높은 수율로 제조하였다. 또한 고분자를 닮은 3가지 모델 화합물인 N-[2-(p-aminophnenylsulfonyl)ethyl]phthalimide (3), 2,2'-(2,2'-sulfonylbis(ethane-2,1-diyl))diisoindoline-1,3-dione (4), 및…
Biotransformation gesteigert werden.
분지화된 폴리에스테르계 공중합체를 제조하고, 공중합체의 분자량, 용융점도, $T_g$ , 1/2 method temperature( $T_{1/2}$ ) 및 레올로지 특성을 고찰하여 레이저 프린터 토너 바인더로의 적용을 검토하였다. 디메틸테레프탈레이트(DMT), 에틸렌글리콜(EG), 2,2-bis(4-(2-hydroxypropoxy)phenyl)propane(HPP)으로 제조한 선형공중합체는 분자량이 낮고, 용융탄성이 낮아 이를 개선하기 위하여 분지제로 3 또는 4 관능기를 가진 2-(hydroxymethyl)-2-ethylpropane-1,3-diol(trimet…