THE UTILIZATION OF SELECTED LOCAL RAW MATERIALS IN THE PRODUCTION OF BONE CHINA
THE UTILIZATION OF SELECTED LOCAL RAW MATERIALS IN THE PRODUCTION OF BONE CHINA
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Date
1988-06
Authors
UMAR, A. D. Abdullah
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Abstract
UMAR, Abdullahi Danladi Adinoyi
The Utilization of Selected Local Raw Materials in the Production
of Bone China. M. A. (Industrial Design), July 1988.
The study is concerned with the identification and use of local
raw materilas in procelain production. It has the specific objective
of using bone as main raw material. It is hoped that the result will
be of benefit toward mass production of tableware.
Material sampled were Feldspar and Quartz from Kwara State,
Kaolin from Katsina State and Bone and Secondary Clay from Kaduna
State. The sampled materials were processed by calcination to 900 C;
crushing and watermilling for at least 7 hours. The clays were processed
by levigation. A Rational Analysis of the previously analysed
raw materials was carried out.
Formulation of bodies was done via a 66-tile triaxial blend
of Feldspar, Kaolin and Bone Ash. Further tests like shrinkage,
porosity, modulus of rupture, slip casting and firing tests were carried
out on the selected bodies. Test bodies were made up and milled
for 4 hours and were cast in simple drop out moulds. Such pieces
were then fired supported with calcined Kaolin and Silica sand or
unsupported.
Discussion and analysis of results based on physical observation
were made. It was observed that Bone China slips dry fast, set
fast and crack easily especially if the drying rate at the surface
is not synchronised with the flocculation of the plaster mould. It
was also observed that slips high in clay are a little stronger.
20% addition of both Bomo Clay and Okene Quartz, however, stained
the paste and produced glassy results. Test pieces with cracks deteriorated
further in firing, an evidence of the irreversible nature
of casting faults of Bone China.
Description
A Thesis submitted to the Postgraduate School,
Ahmadu Bello University in partial fulfillment
of the requirements for the degree of MASTER of
ARTS in Industrial Design, with specialisation
in CERAMICS
Department of Industrial Design
Faculty of Environmental Design
Ahmadu Bello University, Zaria
July 1988
Keywords
UTILIZATION,, SELECTED LOCAL,, RAW MATERIALS,, PRODUCTION,, BONE CHINA.