Powder particle size relationship in microwave synthesised ceramic powders

Ramakrishnan, K. N.

doi:10.1016/s0921-5093(98)00871-5

Cited by 7 publications

(2 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Usually, the normal distribution represents the average particle size ( D 50 ); however, we used Weibull analysis, which demonstrates the maximum appearance of the particles in sizes, when compared with normal distribution ( D 63 > D 50 ). Recently, Ramakrishnan 27 studied the particle size distribution of different ceramic particles, such as TiO 2 and ZrO 2 , through the two‐parameter Weibull distribution. However, the degree of distribution (α) or maximum appearance of particles in size (β) has not been studied.…”

Section: Resultsmentioning

confidence: 99%

Synthesis and Morphological Analysis of Titanium Carbide Nanopowder

Sarkar¹,

Chu²,

Cho³

et al. 2009

Journal of the American Ceramic Society

View full text Add to dashboard Cite

One of the major challenges in the development of nanostructured/ultrafine nonoxide ceramics is the synthesis of nonagglomerated‐nanosized ceramic powders. Here, we investigate carbothermal reduction to obtain spherical titanium carbide (TiC) nanoparticles smaller than 100 nm in diameter. Using a combination of characterization techniques, it has been confirmed that optimum thermal reduction conditions include a temperature of 1350°C with 1 h holding in an argon atmosphere. A three‐parameter Weibull distribution function provides a satisfactory fit for the size distribution of the synthesized TiC nanoparticles. Varying the synthesis time at 1350°C revealed the particle coarsening exponent “n” to be 2.9 and that particle shapes change from spherical at 1 h to more faceted at longer holding times of 4 h.

show abstract

Section: Resultsmentioning

confidence: 99%

Synthesis and Morphological Analysis of Titanium Carbide Nanopowder

Sarkar¹,

Chu²,

Cho³

et al. 2009

Journal of the American Ceramic Society

View full text Add to dashboard Cite

show abstract

“…There are several reports in the literature of TiO 2 powder preparation by microwave processing. Ramakrishnan synthesized titania ceramic powders from TTIP in methanol under microwave irradiation . Ayllón et al prepared anatase TiO 2 powder from a fluorine-complexed titanium aqueous solution using microwave irradiation .…”

Section: Introductionmentioning

confidence: 99%

Microwave-Assisted Preparation of TiO₂/Activated Carbon Composite Photocatalyst for Removal of Methanol in Humid Air Streams

Tao

Mazyck

2006

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

TiO 2 /activated carbon composite photocatalyst was prepared by a microwave-assisted impregnation method and was employed for the removal of methanol from humid air streams. A commercial microwave oven (800 W) was used as the microwave source. Under 2450 MHz microwave irradiation, titanium tetra-isopropoxide (TTIP) was quickly hydrolyzed and anatase TiO 2 was formed in a short time (<20 min). As a result of the volumetric heating and selective heating of the microwave, the solvent and byproducts were quickly removed which reduced energy consumption and processing time. The formed submicrometer TiO 2 particles mainly deposited on the external surface of carbon. In a packed bed reactor with an empty bed contact time of 0.35 s, the prepared materials maintained a 40% removal efficiency at an inlet methanol concentration of 39 ppm. When the TTIP conversion was complete, neither the irradiation time nor the water/TTIP ratio could further change the photocatalytic activity.

show abstract