A cordierite powder was synthesized from a batch composition of talc, diatomite and alumina. Sintered samples of the synthesized cordierite were characterized by X-ray diffraction (XRD), differential thermal analysis (DTA), and Rietveld analysis. The XRD analysis showed hexagonal or a-cordierite (indialite) as a major phase along with MgAl2O4 spinel and cristobalite as secondary phases in the s...

BaTiO3-based positive temperature coefficient (PTC) thermistors have been prepared by microwave sintering. The sintering process was carried out in a 2.45 GHz multimode microwave tube furnace without any susceptor The heating behavior of the PTC material, influence of processing conditions on microstructure, and electrical properties of the sintered samples were investigated. The sintering temp...

ةــصلاخلا : ُـي ةيساسلأا تاضارتفلاا نم ةلاحلا دادتملا يسدنهلا عيزوتلا ربتع ةراشلأل فوآرام ةجذمن ءادأ نم د ُّ حت يتلا ةيتوص لا . ة يعباتتلا ءاز جلأا جذو منأ نإ ف ،مو معلا ى لعو – تا يئزج كلذ آو ،ةيئاوش علا HMM ى لعو ، يف ةبوعص ةجرد يف ةدا يز ى لإ هرود ب يدؤ ي اً يئزج صقن لا اذ ه زواجتل ،صوصخلا روطلا د يدحتو بيرد ت . جذو من نمض توصلا تايئاصحلال يجيرد تلا ي نمزلا ر يغتلا جرد ن م ل ،ضار تفلاا اذ ه ى ل...

In the present study, sintering behavior and electrical conductivity of Sm doped Ceria (SDC) multi-doped (Sm/Pr/Li) electrolytes synthesized by microwave-assisted co-precipitation method is studied. SDC green pellet displayed a unimodal shrinkage with linear 15.67% along slight dedensification above 1350℃. An increase in an temperature from 1200 to 1300℃ was observed. Further increasing (1400 1...

عاطقلا طبر ي يذ لا ة يبرهكلا ىو قلا ماظنل يكيمانيدلارارقتسلال ةضيفتسم ةيلمع ةسارد ثحبلا اذه مدقي ني ب ة لوقنملا ةرد قلا ةدا يز ى لع ك لذ ريثأ ت و ةيدوعس لا ءا برهآ ةآر ش ن م ط سولأا عا طقلا و يقرش لا نيعاطقلا ، ىوقلا مظن تاتبثم طبض للاخ نم كلذو . دقل شم ةغايص مت ةلك طبض ةروص ىف تاتبثملا هذه ةلثمأ ةلكشم . ماظنلا ءادأ نيسحتل ك لذو ةدر فنملا ماظنلا ميق ىلع نادمتعت فده يتلاد حارتقا مت دقلو . د قلو ...

Transparent MgAl2O4 ceramics were fabricated by pulsed electric current sintering (PECS) employing two-step mode. First, nanoscale powders produced solution combustion synthesis from hydrated nitrate compounds and urea. Subsequently, the synthesized sintered PECS with a heating rate of 100oC/min under an applied pressure 100 MPa. The process was conducted according to profile. At first step, te...

In this work we report on the design, microfabrication and analytical performances of a new electrochemical sensor array (ESA) which allows for the first time the simultaneous amperometric detection of nitric oxide (NO) and peroxynitrite (ONOO ), two biologically relevant molecules. The on-chip device includes individually addressable sets of gold ultramicroelectrodes (UMEs) of 50 mm diameter, ...

Preparing high relative density ?-TiAl alloy by pressure-less sintering at low-cost has always been a challenge. Therefore, new kind of non-spherical pre-alloyed TiAl powder was prepared the reaction TiH2 and Al 800 °C to fabricate high-density Ti-48Al via sintering. The oxygen content controlled below 1800 ppm using coarse (~120 ?m). sintered densities ranged from 92.1% 97.5% with temperature ...