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CHAPTER 2 - Ammonium

0.1 wt % of the coated powders, pure alumina and Sic powders were dispersed separately in 1 litre of deionised water using NaN03 as electrolyte. The samples were aged for 24 h and the pH is adjusted on each aliquot batches of 100 ml until values

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Thermal Oxidation of Silicon Carbide (SiC) Experimentally …

Thermal Oxidation of Silicon Carbide (SiC ) Experimentally Observed Facts 209 (a) (b) Fig. 1. (a) Schematic details of 4H-SiC substrate which was used and (b) A 2 diameter 4H-SiC wafer hold by tweezers showing optical tr ansparency by looking at carrier

Experiments For Preparing Sic By Ball Milling Techninque

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Development of dual-phase SiC/Si3N4 nanostructures on …

As-received micron-sized SiC particles were reduced to nanosized SiC particles by high-energy ball milling. Further, the ball-milled powders were heat-treated at 1300 C, 1400 C and 1500 C for 2 h in argon and nitrogen atmospheres.

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Dispersion of nano-silicon carbide (SiC) powder in …

The dispersion characteristics of nanosize silicon carbide (SiC) suspension were investigated in terms of surface charge, particle size, rheological measurement and adsorption study. Ammonium polycarboxylate has been used as dispersant to stabilize the suspension. It was found that the isoelectric point (iep) of SiC powder was pHiep (4.9). The surface charge of powder changed significantly in


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Characterization of Si3N4 powders Abstract-High technology ceramics based on Si3N are manufac— tured by sintering high pure and fine grained Si34 powders at high temperatures and pressures. Chemical composition, phase distribution and physical properties of

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Silicon carbide powder (SiC) was comminuted in a planetary mill during time intervals of 0.5 2 4 and 6 h. The wet milling media was ZrO 2 spheres in isopropyl alcohol. The powders were then characterized with respect to chemical composition particle size distribution surface .


1. C.K. Chung*, O.K. Khor, C.J. Syu and S.W. Chen (2014, Dec). Effect of oxalic acid concentration on the magnetically enhanced capacitance and resistance of AAO humidity sensor. Sensors & Actuators B-Chemicals. (Accepted). MOST