Abstract
Aluminosilicate are often produced from kaolin with a kaolin bond in the formulation intended to increase the thermal strength of the product. Because kaolin formulations do not sinter well, investigation of methods for increasing the density of kaolin is highly relevant. The density can be increased by increasing the degree of dispersion. An additive which improves sinterability would be especially effective. Bentonite with its high plasticity and reactive surface meets these requirements to a certain extent. Four formulations of the porcelain tableware were prepared in different percentage from 0 to 15 wt.% of calcic bentonite. The mass loss and shrinkage of different formulations were measured by using the following thermal analysis such as: Differential thermal analysis (DTA), thermal gravimetric analysis (TGA) and dilatometric analysis. Its density, water absorption, total porosity and the flexural strength were also measured at different temperatures between 1250 and 1400°C. It was found that the bentonite added to the formulation increases the strength of the product and reduces the total porosity to 3.35% by increasing the degree of dispersion during the grinding of the components, thereby improving the sintering process of the formulation. On one hand, the weight loss, shrinkage and sintering time were decreased. On the other hand, the thermal resistance and flexural strength were increased at 1380°C for 10 wt.% of bentonite content. Key words: Firing, suspensions, total porosity, thermal properties, flexural strength, bentonite.
Highlights
Formulations of traditional porcelain usually involve 25 wt.% of plastic component, 25 wt.% silica and 50 wt.%feldspar for soft porcelain and50 wt.% of clay, 25 wt.% silica and 25 wt.% feldspar for hard porcelain (Jouene, 2001; Alessandro, 2007)
The aim of this paper provides the performance of the nature of interactions between raw materials and calcic bentonite for producing the material porcelain tableware
thermal gravimetric analysis (TGA) and Differential thermal analysis (DTA) of the four porcelain samples are shown in Figures 1 to 4
Summary
Feldspar (generally sodium feldspar) for soft porcelain and. 50 wt.% of clay, 25 wt.% silica and 25 wt.% feldspar (generally potassium feldspar) for hard porcelain (Jouene, 2001; Alessandro, 2007). Bentonite is a natural mixture of minerals, it is characterized by a high capacity adsorption, ion exchange and swelling. There are two types of bentonite: sodic and calcic. License 4.0 International License sodium hydroxide because they have the highest capacity of swelling. Bentonite has been applied in environmental preservation when removing heavy metal ions from wastewater (Savic et al, 2012; Savic et al, 2014b)
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
