Combustion is a rapid reaction between oxygen in the fuel which generates heat as a result of chemical reactions between a fuel and oxygen.<\/span> Oxygen from the air or have parts volume by 21%, nitrogen 78%, and the molecules of other gases 1%.<\/span> Some of the factors that will determine the success of the combustion process, among others:<\/span> The first change occurred in the clay when it is burned is the loss of free water.<\/span> Especially for secondary clay will be followed by the burning of other organic materials, such as humus, leaves, and twigs contained in the clay.<\/span> In the subsequent changes in the chemical content of the water will be lost.<\/span> Primary and secondary clay containing free silica in the form of sand, quartz, flint, and crystal.<\/span> Silica is subject to change the shape and volume of clay at a certain temperature.<\/span><\/p>\n Some of the changes are permanent (conversion) and others are able to turn back (inversion).<\/span> So that the clay can be transformed into ceramic must go through the combustion process with a temperature exceeding 600\u00baC.<\/span> After going through the temperature of the clay will change into a mineral dense, hard, and permanent.<\/span> These changes are called ceramic tile change or changes that occur at a temperature of 573 o<\/sup> C.<\/span><\/p>\n Baked clay of less than 600 \u00b0<\/sup> C has not had a proper maturity despite changes ceramics.<\/span> Maturity is a vitrified clay or ceramic condition that has reached maturity temperature accurately without changing shape.<\/span> At combustion temperatures below 800 \u00b0<\/sup> C, free silica minerals such as carbonate minerals will change as well.<\/span> This is a result of the burning of all the elements of carbon, called calcination process.<\/span><\/p>\n Physical changes occur at temperatures above 800 \u00b0<\/sup> C, which is when the ingredients alkali act as ‘flux’ over silica and alumina form a network of crystal (noble) and the glass binding material can not be dissolved into a mass of strong (burning biscuits).<\/span> When clay was burned at a temperature of 1300 \u00b0<\/sup> C, some changes will occur, for example, the body becomes harder when it cools and becomes impermeable.<\/span><\/p>\n The clay has undergone a process of ‘vitrification’, meaning that most of the material, especially silica has menggelas, enter the pores, and bind all the particles of clay to form a bond that is known to bond ‘silica alumina hydroxide’.<\/span> The vitrification process can be accompanied by volume shrinkage shows that, the higher the temperature the greater the fuel but the lower shrinkage porosity.<\/span><\/p>\n
\n a.<\/span> The type of furnace.<\/span>
\n b.<\/span> Stove burner.<\/span>
\n c.<\/span> The operation, and<\/span>
\n d.<\/span> Fuel.<\/span><\/p>\n