EFFECT OF PARTICLE SIZE OF ALUMINUM ON THE DEVELOPMENT OF CLINOPTILOLITE BASED POROUS CERAMIC FILTERS
Abstract
This paper reports the effect
of particle size of Al-metal powder addition on the development of
clinoptilolite based porous ceramic filters. The clinoptilolite particles was
mixed with 10 wt.% of Al-powder and the three different clinoptilolite-metal powder mixture samples were prepared
namely: (i) coarse sample (used large size of Al-powder by mixing in dry ball
mill for 5 min.), (ii) moderate sample (using fine size of Al-powder) and (iii)
fine sample (planetary milling of the moderate sample in an aqueous medium for
1 hour). The mixtures were shaped by uniaxial pressing at 50 MPa and later
sintered at the temperatures of 1200°C for 1 hour under air atmosphere. The microstructure and phase evolution were
investigated by SEM and XRD, respectively. The coarse sample indicated corundum
crystallization with silicon (Si) and with poor cristobalite crystallization.
The cristobalite crystallization is prodominantly for the fine and moderate
samples. Except the planetery milled sample (fine) the porosities of the
samples were good enough (~28%) but the pore sizes were different; the
coarse sample showed large pores up to 150 mm in size, the moderate sample produced relatively fine and narrow pore
size distribution (4-65 mm). The
results indicated that the moderate sample leads to production of ceramic
filter with high selectivity during filtration.
Keywords
References
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Details
Primary Language
English
Subjects
Material Production Technologies
Journal Section
Research Article
Publication Date
December 15, 2017
Submission Date
December 23, 2016
Acceptance Date
December 11, 2017
Published in Issue
Year 2017 Number: 039