Sintering

CHAPTER 2 LITERATURE REVIEW 2.1 Effect of Binder and Plasticizers on the Gel Viscosity, Membrane Morphology and Pore Size According to M.R. Othman [7] the result of addition of PVA in Boehmite sol during peptization on the viscosity, coating time, pore size and BET surface area is presented in Table I,II,III, and IV. PVA was prepared by dissolving 2, 4, 6 and 8g of PVA powder into 100mL de-ionized distilled water. PVA with different concentration in the sol give a of characteristics viscosity…

3.2 Mechanochemical synthesis The mechanochemical method was employed to synthesis CP and MgCP where calcium hydroxide (CaOH2), phosphoric acid (H3PO4) and magnesium hydroxide (MgOH2) were used as precursors. Table 3.1 shows the parameter used by varying the weight percentages (wt. %) of Mg. Table 3.1: The weight percentages ratio for magnesium doped calcium phosphate Samples Parameter Calcium Hydroxide Ca(OH)2 (g) Phosphoric Acid H2PH03 (g) Magnesium Hydroxide Mg(OH)2 (g) Undoped CP 27…

Hydroxyapatite (HA) has been studied for their excellent performances which are suitable for use in bone defects or regeneration of bone. Hydroxyapatite (HA) has poor mechanical properties which make it limited used in a load bearing area. In this case, sodium alginate (SA) was used to be mixed with hydroxyapatite (HA) by using precipitation method to increase the mechanical and physical properties. The mixing of hydroxyapatite/sodium alginate effectively increases the densification and hardness…

The SLS process uses powder materials to produce 3D solid parts from CAD file. After the CAD data is uploaded to machine computer in the Stereo lithography file format, the process of sintering starts. From figure 1, it can be observed that SLS system contains three chambers. There are two chambers that is used to store powder and central chamber, where parts of the product is built. The right and left chambers are also called feed chambers…

pre-sintered at 850°C for 4 h. High purity Li2CO3, NiO, MnCO3 and Fe2O3 were mixed in stoichiometric amounts to prepare LNMFO by the same procedure as BFO. The well mixed powder was calcined at 800 °C and pre-sintered at 1200 °C for 4 h. After pre-sintering, powders were again grinded in an agate mortar. The obtained powders of BFO and LNMFO were mixed in weight…

selective laser sintering machine, and games producer software) are new one, the image scanning sensor unit and 3D manufacturing machine i.e. selective laser sintering machine are normally use in medical and engineering purpose(Oliva and Kallenberg, 2003). These innovative products would attract the customers and make sophisticated purchase…

High temperature proton exchange membrane fuel cells (HT-PEMFCs) are a promising clean technology, especially for automobile applications.1 These devices generate electricity from the chemical reactions that occur in the anode side of the cell, using H2 as a fuel and generating heat and water as by-products.2, 3 However, experimental studies using HT-PEMFCs show that degradation of the cell can occur after certain hours of operation (around 500 hours).4 Some of the factors that contribute to the…

CHAPTER 5 RESEARCH METHODOLOGY: Materials and Chemicals • Tin Oxide coated glass electrodes, 3 mm thick, 14 Ω/□, Pilkington • Anatase TiO2 nanoparticle colloid, Ti-Nanoxide D/SP, Solaronix Particle size 15-20nm with >100nm diffusing particles. • Black Dye N749, Ruthenizer 620-1H3TBA, Solaronix • Electrolyte: Iodolyte Z-150, Solaronix • Acetonitrile anhydrous 99.8%, Sigma-Aldrich • tert-Butanol - anhydrous ≥99.5%, Sigma-Aldrich • Deoxycholic acid ≥99%, Sigma-Aldrich • Titanium (IV)…

Solution growth deposition This technique consists essentially of inserting the substrate into a solution containing hydrolysable metal compounds and pulling it out at a constant speed into an atmosphere containing water vapour. In this atmosphere, hydrolysis and condensation takes place. Finally the films are hardened by a high temperature cycle to form transparent metal oxides. Any hydrolysable compound including halides or nitrates but preferably metallo-organics are suitable…

Cu also converted to CuO after hydrothermal aging (Kang et al. 2016). The other catalysts all show sintering phenomenon. The catalyst shape becomes irregular, and the particle size becomes much larger than that of fresh catalyst. These results show that the ion-exchanged Cu-BEA SCR catalysts with additives of Ce damaged significantly after hydrothermal aging at 700 °C, probably because of the sintering of particle, which is too large, thus damaged the zeolite structure (refer Fig. 2, XRD results…