Improvement on mechanical properties sodium feldspar for porcelains tableware

Ahmad Sarai, Norazlina (2015) Improvement on mechanical properties sodium feldspar for porcelains tableware. Masters thesis, Universiti Tun Hussein Onn Malaysia.

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Abstract

Porcelain is one of the ceramic materials. In this study, Claytan porcelain was used as a main raw material and added with sodium feldspar as flux. The scope of this project is mainly focused at the effect of sintering temperature and the different process of weight percentage sodium feldspar to Claytan porcelain. Slurry of Claytan porcelain mixed was prepared by agitator mixer. The sodium feldspar mixed with the Claytan porcelain according to the weight percentage of sodium feldspar to Claytan porcelain which is at 2wt. %, 4wt. %, 6wt. %, 8wt. % and 10wt. %. Slip casting was used as the processing method. Sintering process was conducted at four different temperatures 800°C, 900°C, 1000°C and 1100°C and was fixed for 1 hour and heating and cooling rate were at 10°C/minute. DTA/TG was used in order to establish the firing condition. Physical analyses were divided into three analyses which were linear shrinkage, porosity and bulk density of the samples. It was carried out according to the specific ASTM standard of testing. The mechanical behavior was evaluated in term of modulus of rupture and micro hardness. After viewing the results, it can be concluded that percentage of porosity significantly reduces from 30.16% to 22.83% when sintered at 800°C and 1100°C for sodium feldspar 10wt .%. Claytan porcelain with sodium feldspar 2wt. % at 1100oC exhibited the highest strength of 17.59Mpa and micro hardness value 150.40Hv. The effect of firing temperature significantly improved the porosity and the quality of physical properties of Claytan porcelain. For physical and mechanical analyses, the results showed that the increasing of temperature and percentage of sodium feldspar had significantly increased the linear shrinkage, apparent porosity and bulk density.

Item Type:Thesis (Masters)
Subjects:T Technology > TP Chemical technology > TP785-869 Clay industries. Ceramics. Glass
ID Code:7808
Deposited By:Mrs Hasliza Hamdan
Deposited On:03 May 2016 17:06
Last Modified:03 May 2016 17:06

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