الفهرس 
Introduction and Review of LiteratureOnly 14 pages are availabe for public view
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Abstract
Porous thermostable ceramic materials with low temperature coefficient
of linear expansion (TCLE) are required for fabricating refractories,
thermal insulation, catalyst supports and filters for hot liquid gases used
in industry. One of these materials is cordierite based ceramic. Cordierite
is well-known to display low thermal expansion and in turn has an
excellent thermal shock resistance when it is subjected to rapid thermal
changes. There is no doubt that this material is offered as one of the
potential ceramic filters that meet the demand of highly efficient
particulate removal from hot gas stream in a number of industrial process
points. These includes preparation of combustion off gases for reuse
across secondary turbines, removal of particulate from hydrocarbon
processing gas streams above the dew point, filtering of gases from
incineration of reuse and disposal facilities, removal and/or recovery of
catalyst from off gases, and others.
A large numbers of investigations dealt with the using of numerous
techniques in synthesis of cordierite as well as porous cordierite ceramic
with the using of various starting materials or even from analytical grade
oxide powder. Meanwhile, the using of secondary resources or waste
materials can bring a higher output of cordierite at lower costs than the
traditional one, and make a break-through in raw materials as well as
technology.
This dissertation focused on the possibilities of utilization of the solid
waste materials (silica fumes and aluminum slag) in the preparation of
cordierite based ceramic as well as fabrication of porous cordierite body.
The thesis consists of four main chapters.
Chapter one deals with the introduction and literature review. The
literature review part cover all the processes used in synthesis of
cordierite based ceramics. In addition, it contains all the processes used in
fabrication porous ceramic body via various techniques. Meanwhile, the
importance of using solid state reaction during cordierite synthesis among
all other process as well as the importance of using replica technique
during porous body fabrication was reported.
Chapter two concerned with the experimental work. In this chapter, the
experimental procedures during this investigation were clearly described.
On the other hand the characterization tools used during investigation
were illustrated.
Chapter three focused on the results of the dissertation and its discussion.
The most important remarks conducted from this part could be
summarized as follows:-
1- With the using of aluminum slag during synthesis of cordierite
with a mixture of quartz and talc, sintering temperature of 1300oC
with sintering time of 2hr was regarded as the most appreciate
sintering conditions for this batch mixture. On the other hand,
using of 0.2 wt% sodium silicate (based on the dry solids) at pH of
8 was considered the most appropriate conditions for obtaining a
well-dispersed suspension of this powder mixture. The
characterization of porous cordierite body produced with replica
technique revealed the suitability of using the obtained body in the
application concerning dust filtration.
2- With the using of silica fumes during synthesis of cordierite with a
mixture of bauxite and talc, sintering temperature of 1350oC with
sintering time of 2hrs was regarded as the most appreciate sintering
conditions for this batch mixture. A well-dispersed suspension
from this mixture was obtained with the using of 0.2 wt% sodium
silicate (based on dry solids) at pH of 8. Porous cordierite body
with large spherical interconnected pores includes small irregular
pores was obtained via replica technique. This structure is suitable
for application in dust collection purpose.
3- During the usage of the two waste together (silica fumes and
aluminum slag) with talc, the most appreciate sintering condition
for this batch mixture was found to be 1325oC sintering
temperature and 2hrs sintering time. However, 0.2% sodium
silicate (based on dry solids) at suspension pH of 8 was regarded as
the most appreciate conditions for obtaining a well-dispersed
suspension from this mixture. The obtained porous body from this
mixture proved to be suitable for dust collection purpose.