Physical Changes in the Primary and Secondary Clay after Burned<\/strong><\/p>\n

The first change that occurs in the primary and secondary clay when burned, is the loss of free water. Especially for secondary clay will be followed by the burning of other organic materials, such as humus, leaves, and twigs contained in the clay. In further changes the chemical content of the water will be lost. Primary and secondary clay containing free silica in the form of sand, quartz, flint and crystal. Silica is subject to change shape and volume of clay at a specific temperature. Some changes are permanent (conversion) and the other to change back (inversion).<\/p>\n

In order to turn into a clay tile to go through the process of combustion temperature exceeds 600 \u00ba C. After the temperature through the clay mineral has been changed into a dense, hard and permanent, these changes disebutCheramic change or change in ceramics. Steadfast burnt clay is less than 600 \u00ba C has a maturity not exactly in spite of ceramic change.<\/p>\n

Maturity is a vitrified clay or ceramic condition that has reached maturity is the right temperature without changing its form. At combustion temperatures below 800 \u00ba C, free silica minerals such as carbonate minerals will change as well.<\/p>\n

This is a result of the burning of all the elements carbon, a process called calcination. Physical changes occurring temperature above 800 \u00ba C, which is when the materials alkali acts as a ‘flux’ for silica and alumina to form a network of crystals (noble) and glass binding materials that can not be dissolved into a mass of solid (burning biscuits ).<\/p>\n

When the clay is burned at a temperature of 1300 \u00ba C, some changes will occur, for example, the body becomes much harder when it cools and becomes watertight. The clay has undergone a process of ‘vitrification’, meaning that most of the material, especially silica has menggelas, enters the pores and bind all the clay particles to form a bond, known as a bond ‘Silica Alumina Hydroxide’.<\/p>\n

The vitrification process can be accompanied by volume shrinkage, where the higher the temperature the greater the fuel but the lower the shrinkage porosity or in other words the more solid objects and air.Tanah impermeable clay which does not undergo a process of ‘vitrification’ at high temperature (1300 \u00b0 C) can be classified into type of clay ‘refractory’ (refractory clay).<\/p>\n

Each clay can be melted when the temperature is sufficiently grilled. Ideally each type of clay has vitrified point without a change in shape (deformation). In practice, vitrification is often followed by a change in shape. This is due to the stresses on the body that is the weakest due to melting of the clay minerals.<\/p>\n

Change the color of fire, temperature, and condition that occurs in clay during the process of combustion, as shown in the figure below. The things that need to be considered in the combustion
\na. Do not burn too fast clay because the clay will explode into a million pieces or cracked. This is due to not enough time for the water to evaporate plasticity.<\/p>\n

b. The cooling process should not be done quickly, clay volume changes are often very sudden. Causes a sudden cooling of the surface gets hotter than the surface of the other, so that when the volume changes the volume of the other has not changed. It is this factor that causes baked clay to be broken. Therefore, the cooling process should be done later and as evenly as possible to prevent the outbreak of goods. These errors will rarely occur if the furnace is not opened before the temperature in the furnace to 100 0 C.<\/p>\n","protected":false},"excerpt":{"rendered":"

Physical Changes in the Primary and Secondary Clay after Burned The first change that occurs in the primary and secondary clay when burned, is the loss of free water. Especially for secondary clay will be followed by the burning of other organic materials, such as humus, leaves, and twigs contained in the clay. In further …<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[60],"tags":[2273,2274,2275,2276,2277,2278,2279,2280,2281,2282],"class_list":["post-1924","post","type-post","status-publish","format-standard","hentry","category-tanah-liat","tag-types-clay","tag-types-clay-bodies","tag-types-clay-bricks","tag-types-clay-masks","tag-types-clay-minerals","tag-types-clay-pots","tag-types-clay-pottery","tag-types-clay-roof-tiles","tag-types-clay-sculpture","tag-types-clay-soil"],"_links":{"self":[{"href":"https:\/\/www.tneutron.net\/blogs\/wp-json\/wp\/v2\/posts\/1924","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.tneutron.net\/blogs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.tneutron.net\/blogs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.tneutron.net\/blogs\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.tneutron.net\/blogs\/wp-json\/wp\/v2\/comments?post=1924"}],"version-history":[{"count":1,"href":"https:\/\/www.tneutron.net\/blogs\/wp-json\/wp\/v2\/posts\/1924\/revisions"}],"predecessor-version":[{"id":9532,"href":"https:\/\/www.tneutron.net\/blogs\/wp-json\/wp\/v2\/posts\/1924\/revisions\/9532"}],"wp:attachment":[{"href":"https:\/\/www.tneutron.net\/blogs\/wp-json\/wp\/v2\/media?parent=1924"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.tneutron.net\/blogs\/wp-json\/wp\/v2\/categories?post=1924"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.tneutron.net\/blogs\/wp-json\/wp\/v2\/tags?post=1924"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}