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"Annealing effect on the electrical properties change of P - type 6H-Sic schottky diodes with SiO2 ramp profile after irradiated up to 1.75 MGy at RT (Room Temperature) were investigated. A perpendicular edge termination based on oxide ramp profile around the schottky contact is used on Al schottky rectifier fabricated on a 10 um p--type 6H-SiC epi-layer on P-type 6H-SiC substrate (3.5 off, Si face) Na : 5.9 x 10 15/cm2"

"Keberhasilan suatu proses pembentukan (forming) khususnya deep drawing baja lembaran untuk menghasilkan produk tertentu sangat ditentukan oleh sifat-sifat materialnya, walaupun juga masih sangat tergantung pada variabel-variabel proses pembentukan itu sendiri. Sifat mampu bentuk baja lembaran dingin sangat dipengaruhi oleh tekstur kristalografi. Komponen tekstur yang berpengaruh pada sifat mampu bentuk baja lembaran adalah (111)<112> dan (100)<110)>. Parameter yang banyak digunakan untuk menunjukkan sifat mampu bentuk baja lembaran dingin diperoleh dengan uji tarik. Yang menjadi ukuran adalah nilai rm. (koefesien anisotropi plastis normal). Walaupun dari uji ini data relatif cepat dan mudah diperoleh, namun data yang diperoleh kurang menunjukkan sifat yang sesungguhnya. Pengujian yang cukup p·opuler dan sering dipakai adalah cup drawing test. Pengujian ini menggunakan punch datar, yang berarti deep drawing murni. Besaran yang . menjadi ukuran deep drawability pada cup drawing test adalah Limiting Drawing Ratio (LDR). Dengan melakukan kedua pengujian ini, maka akan dapat diketahui hubungan yang lebih teknis dan praktis antara nilai rm dengan LDR. Perubahan variabel siklus anil (annealing) selalu ditujukan untuk mendapatkan sifat material (mampu bentuk, nilai rm) ke arah yang lebih baik. Dilain pihak perubahan sifat material akan diikuti dengan perubahan pada batas operasi deep drawing. Dengan demikian perlu diketahui pengaruh perubahan sifat mampu bentuk (nilai rm) terhadap perubahan batas operasi deep drawing. Percobaaan pada penelitian ini dilakukan dengan dua tahap. Tahap pertama adalah percobaan anil yang dimaksudkan untuk mendapatkan variasi sifat mampu bentuk. niiai rm· Percobaan kedua adalah deep drawing. Percobaan ini dilakukan umuk mendapatkan batas operasi deep drawing, yaitu gaya pemegang bakalan (Blank Holder Force, BHF) dan LDR. · Dari hasil percobaan menunjukkan, laju pemanasan lambat, temperatur tinggi dan waktu tahan lama, dapat menaikkan rasio tekstur (111)<112> tt'.rhadap (100)<110)>. Kenaikan rasio tekstur diikuti dengan kenaikan nilai rm dan LDR. Pada batas operasi deep drawing menunjukkan bahwa selang gaya pemegang bakalan menjadi lebih lebar pada kondisi anil laju pemanasan lambat, temperatur yang tinggi dan waktu tahan lama.

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The success of a forming process especially a deep drawing produces a component depends on its material properties besides on forming process variables itself The formability of cold sheet steel very influenced by its crystallographic textures. The texture components that influence sheet steel formability are texture (111)<112> and (100)<110>. The parameters most widely used to showed cold sheet steel formability to be obtained by tension test. That is value of the normal plastic anisotropy coefficient, rm-value. Datum of this testing can be taken easily and faster but the result does not show the real of material properties. Another popular method is called cup drawing test. This test uses a flat bottom punch so it can be considered as pure deep drawing. On deep drawing test, deep drawability values are represented by limiting drawing ratio (LDR). By conducting these tests, more practical and technical relationship between rm-value with LDR can be understood. The changes of annealing cycle variables always aimed to get better material properties (formability, rm- value). In the other side, changes of material properties wili be followed by change of deep drawing operation limits. Therefore, it needs to be understood effect of changes of sheet steel formability (rm-value) on deep drawing operation limits. The experiment was divided into two stages. First stage is annealing simulation that means to get formability variation of sheet steels, rm-value. The second stage is deep drawing test to find out deep drawing operation limits, that are blank holder force, BHF and LDR. The results showed that slow heating rate, high temperature and prolonged holding time could increase texture intensity ratio (111)<112> to (100)<110>. The increase of texture ratio is followed by the increase of the rm-value and LDR. This annealing cycle pattern also makes the blank holder force range wider at the deep drawing operation limits."

"Optimalisasi paduan cartridge brass sebelumnya telah dilakukan lewat penambahan paduan Al, menghasilkan paduan Al-brass dengan fasa α dan β biner yang memiliki kekuatan mekanis lebih tinggi dari paduan konvensional tanpa mengalami reduksi elongasi yang signifikan. Dalam penelitian ini, dipelajari mengenai pengaruh proses manufaktur canai dingin dan perlakuan anil terhadap karakteristik fasa dan yang terdapat dalam paduan Cu-29.5Zn-2.5Al wt. hasil pengecoran gravitasi. Pelat as-cast dihomogenisasi pada temperatur 800 °C selama 2 jam, dideformasi menggunakan canai dingin dengan derajat deformasi sebesar 20, 40, dan 50, dan diberikan perlakuan anil pada temperatur 150, 300, 400, dan 600 °C selama 30 menit. Karakterisasi dilakukan melalui observasi mikrostruktur dengan mikroskop optik, pengambilan gambar dengan SEM, uji komposisi OES dan SEM-EDS, karakterisasi fasa dengan XRD, dan pengujian kekerasan mikro dengan metode Vickers. Paduan as-homogenized memiliki struktur mikro martensitik dua fasa α dan βdan dengan diamond-shape configuration. Setelah canai dingin terlihat adanya mekanisme deformasi slip, cross-slip, twinning, dan pembentukan shear band hanya pada fasa ?, sementara peningkatan kekerasan mikro terjadi pada kedua fasa dan. Selanjutnya, perlakuan anil temperatur rendah pada 150 °C menghasilkan peningkatan kekerasan mikro paduan akibat pembentukan atmosfir Cottrel, sementara perlakuan anil di temperatur 300, 400, dan 600 °C menghasilkan penurunan nilai kekerasan mikro akibat mekanisme penguraian dislokasi dan relaksasi tegangan. Rekristalisasi butir equiaxed hanya terjadi di fasa α dan β pada hasil anil temperatur 600 °C.

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Previous research displayed a successful attempt in optimizing mechanical properties of cartridge brass by utilizing Al alloying element, producing binary Al brass alloy with higher strength and hardness without a significant diminution in its elongation compared to conventional cartridge brass alloys. Hereinafter, the effect of cold rolling and annealing treatment on the characteristics of α and β phases in gravity casted Cu 29.5Zn 2.5Al wt. alloy was studied. Produced as cast samples were homogenized at 800 °C for 2 h, subjected to cold rolling with 20, 40, and 50 reduction in thickness, and annealed at 150, 300, 400, and 600 °C for 30 min. Phase characterizations were done through optical microscopy, SEM imaging, OES and SEM EDS composition analysis, XRD, and micro Vickers hardness measurement. A binary martensitic morphology with diamond shape configuration compromising of α and β phases were found in as homogenized sample. Cold rolling resulted in slip, cross slip, twinning, and formation of shear band, solely in the phase. However, increase in microhardness was detected in both α and β phases. Furthermore, it was found that low temperature annealing at 150 °C resulted in an increase of micro hardness of both phases due to the formation of Cottrel atmosphere, while usual decrease in hardness value was discovered after annealing at 300, 400, and 600 °C through disl°Cation entanglement and stress recovery mechanisms. Recrystallized phase β grains in equiaxed shape were visible in sample annealed at 600 °C."

"Purpose of Research (specific objective and/or statement of hypothesis in around 300 to400 words. Please try to avoid using an additional page). Zry-4 is an alloy of Ziconium (Zr) with alloying elements of Fe,Cr, and Sn with weight percentage of 0.2%, 0.07% and 1.5% respectively. This alloying element addition is intended to improve the mechanical properties as well as Zirconium, that is corrosive resistance at high temperature. Besides the alloying elements, the micro structural morphology of Zry-4, as results of thermomechanic treatment process, also an active role to determine mechanical, physical and corrosion properties. This alloy is used as structure and cladding materials for Pressurized water Reactor (PWR) nuclear fuel element. Zirconium alloy of Zr-702 will also be used for chemical engineering devices due to its high corrosion resistance in acid and alkali liquid as well as at high temperature. Examples of device are : Distillation Column, Reactor, Pump Housing and Heat exchanger and Heating coil due to mechanical properties at high temperature. Some researchs have been done previously to observe changes of mechanical and corrosive properties of Zry-4 with solution treatment 0-phase, but unfortunately they are not continued between deformation degree and grain size with new precipitate is obtained.In this research we plan to carry out a cold deformation process of 0-quenching result and be continued with annealing process. From the process results we will observe the morphology of micro structure of Zry-4. This process will enable to determine the deformation level, time and temperature annealing to obtain a certain microstructure according to the desired mechanical properties (Microhardness). Results of research can hopefully be used as input in the working process of Zry-4.Optical Microscopy, Transmission Electron Microscopy and X-Ray Diffraction will be used in the microstructure observation."

"Single Emissive Organic Light Emitting Diode (OLED) merupakan divais diodapenghasil cahaya yang terdiri dari emissive layer yang diapit oleh 2 konduktoryakni anoda dan katoda. OLED dibuat dengan proses fabrikasi yang direalisasikandengan berbagai tahapan, pada skripsi ini dilakukan tahapan fabrikasi. Ketikalaminasi dilakukan, temperatur laminasi menjadi masalah dalam proses fabrikasiyang menentukan berhasil atau tidaknya fabrikasi divais dioda. Pada skripsi inidilakukan fabrikasi OLED struktur ITO/PFO/Al dengan temperatur laminasi yangberbeda-beda. Setelah fabrikasi, dilakukan pengujian karakteristik I-V dari divaisOLED. Hasil pengujian karakteristik I-V menunjukkan bahwa laminasi optimalterjadi pada temperatur 160 C.

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Single Emissive Organic Light Emitting Diode OLED is a diode device composedof emissive layer sandwiched by 2 conductors that are anode and cathode. OLED ismade by fabrication process that is realized by many steps, in this paper laminationstep was performed. While lamination, the lamination temperature become one ofthe problems in fabrication process that decided the diode fabrication is success ornot. In this paper OLED with ITO PFO Al structure was fabricated with differentlamination temperature. Then, I V characteristic of OLED device was tested. TheI V characteristic test result show that the optimum lamination is at temperature160 C."

"Organic Light Emitting Diode OLED adalah sebuah divais electroluminance yang menggunakan bahan organik sebagai emissive layer. Dalam fabrikasi OLED terdapat berbagai macam cara untuk menumbuhkan emissive layer dengan ketebalan tertentu. Salah satu tekniknya adalah dengan cara spincoating. Kecepatan rotasi spincoating menentukan ketebalan dari lapisan yang ditumbuhkan. Ketebalan lapisan tersebut mempengaruhi performa divais yang dihasilkan. Dalam skripsi ini OLED dengan struktur ITO/ Polylfluorene PFO /Al difabrikasi menggunakan teknik laminasi dan menggunakan spincoating untuk menumbuhkan lapisan PFO. Variasi dilakukan terhadap kecepatan rotasi spincoating pada 1000 rpm, 2000 rpm, 3000 rpm, 4000 rpm, dan 5000 rpm. Hasil fabrikasi menunjukkan karakteristik arus dan tegangan yang dihasilkan sesuai dengan karakteristik OLED. Kecepatan rotasi spincoating yang optimum adalah 3000 rpm. Divais 3000 rpm, 4000 rpm, dan 5000 rpm dapat menghasilkan luminasi berwarna kebiru-biruan.

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Organic Light Emitting Diode OLED is an electroluminance device that uses organic material as an emissive layer. In OLED fabrication there are various ways to grow an emissive layer with a certain thickness. One of the techniques is by spincoating. The rotation speed of spincoating determines the thickness of the grown layer. The thickness of the layer affects the performance of the resulting device. In this thesis OLED with the structure of ITO Polylfluorene PFO Al is fabricated using lamination technique and using spincoating to grow PFO. Variations were made to spincoating rotation speeds at 1000 rpm, 2000 rpm, 3000 rpm, 4000 rpm, and 5000 rpm. The fabrication results show the current characteristics and OLED voltage. The optimum rotational speed of spincoating at 3000 rpm. The device has the smallest treshold voltage. The 3000 rpm, 4000 rpm, and 5000 rpm devices can produce bluish luminations."

"The purpose of this research is to find out the characteristics of reservoir parameter and to estimate the pressure of geothermal field. The annealing simulation methods is a conditional simulation that has some advantages, is able to avoid local optimal value mistakes and can be used in data extrapolition. The result of the annealing simulation on the geothermal field are image, contour, and semivariogram of parameter resevior. There are two conclusions gained from this research. Annealing simulation methods gives are two an image of reservoir with limited data and is valid to be used in parameters prediction of reservoir at the Kamojang geothermal field with significance 5% and the optimum pressure of geothermal is 31.85 ksc with location (-22248m.1663.6m)"

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Pengembangan pembuatan lapisan tipis Cu2ZnSnS4 dengan metode SILAR menjadi perhatian penelitian kini untuk menciptakan sel surya berbasis lapisan tipis yang terjangkau dan efisien. Proses anil dengan sulfur yang dilakukan pada lapisan tipis CZTS dapat memperbaiki sifat-sifat pada lapisannya. Temperatur dan waktu anil merupakan parameter utama dalam proses anil pada lapisan tipis CZTS. Penelitian ini bertujuan untuk mengetahui pengaruh temperatur dan waktu anil terhadap sifat optis berupa nilai energi celah pada lapisan tipis CZTS dengan jumlah siklus pencelupan yang sudah ditentukan yaitu sebanyak 40 siklus.

Variabel temperatur anil adalah 250oC, 300oC, 350oC dan 400oC. Sedangkan variabel waktu anil adalah ½ jam dan 1 jam. proses anil yang dilakukan menggunakan sulfur padatan. Pengaruh temperatur dan waktu anil pada sifat morfologi, optikal dan struktural telah diuji. Nilai energi celah yang dihasilkan bervariasi bergantung pada temperatur dan waktu anil. Hasil pengujian XRD pada semua sampel, ditemukan fasa CZTS dengan puncak difraksi yang memiliki intensitas yang rendah. Topografi permukaan yang dihasilkan menunjukkan penampakan retakan dan juga kemungkinan fasa kedua CuxS.

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Development of Cu2ZnSnS4 thin films fabrication with Successive Ionic Layer Adsorption and Reaction (SILAR) method has become a concern to produce low cost and efficient based thin film solar cells. Anneling process in sulfur condition was done on CZTS thin films to improve its properties. Annealing temperature and time are the main parameter for anneling process on CZTS thin films.

This study aims to know the effect of annealing temperature and time on CZTS optical property with 40 immersion cycles. Annealing temperature variables are 250oC, 300oC, 350oC, and 400oC. While the annealing time variables are ½ hour and 1 hour. Annealing process is performed using solid sulfur. The effect of annealing temperature and time on morphology, optical and structural properties were examined. The resulting band gap energy varies which depends on annealing temperature and time. The XRD results on every samples was found CZTS phase with diffraction peak which has low intensity. Surface topography shows the presence of cracks and possibility of CuxS second phases.

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"Envelope detector berperan dalam proses demodulasi dan terletak di belakang low noise amplifier pada receiver wireless power and data transfer. Envelope detector sendiri merupakan rangkaian elektronika yang dapat mendeteksi puncak dari sebuah gelombang atau daya yang masuk, sehingga hanya menunjukan bagian envelope pada gelombang tersebut. Untuk keperluan alat implan medis, kebutuhan tegangan operasional sangat rendah sehingga ini menjadi tantangan sendiri. Penelitian ini menyajikan tiga macam desain envelope detector yang bekerja pada 14 MHz (ISM band) yang terdiri dari rangkaian transistor berupa nMOSFET, PNP BJT, atau Dioda Schottky yang dilakukan diatas PCB. Berdasarkan simulasi, penggunaan ketiga tipe semikonduktor tersebut dapat melakukan pendeteksian envelope hingga ke tegangan 100 mV. Namun berdasarkan hasil uji coba yang dirangkai pada PCB, kapabilitas pendeteksian paling rendah dan stabil dapat dilakukan pada tegangan 500 mV.

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Envelope detector used on a WPDT receiver serves in a demodulation process following an amplification by an LNA. Envelope detector is an electronic circuit used to detect the envelope of a given wave by utilising the peak signals. In medical implant devices, operating in a very low voltage is compulsory and poses challenges. This research presents three envelope detector designs operating in 14 MHz consisting of transistors configurated with either an nMOSFET, PNP BJT or a Schottky diode implemented on a PCB. Based on the simulations, the proposed circuit design had been able to detect the envelope of the coming signals with the ability to detect as low as 100 mV. Moreover, the fabricated circuit implemented on a PCB shows the ability to detect an envelope as low as 500 mV."