Losses burn a ceramic object is a quantity that can be measured on the shrinking (size) due to the burning object. It was not just because of the evaporation of free water, but because of the changing nature of the chemical and physical properties of clay into ceramic permanently. Soft clay when mixed with water easily parsed and plastic, but after being burned into a hard stony clay and water-resistant and shrink in size compared to the size of the time before burning.<\/p>\n

Things That Cause Losses Fuel Occurrence<\/strong>
\nIn the process of burning ceramic objects will be a process as follows:
\na. Evaporation of residual water forming<\/strong>
\nAlthough it has been drained, but the amount of water vapor still remain \u00a0 in the pores of the ceramic objects and will only evaporate when objects \u00a0 The burned. After that there was shrinkage because all particles \u00a0 closer together to fill the pores.<\/p>\n

To avoid the outbreak of objects \u00a0 ceramics were burned as a result of water vapor pressure and shrinkage \u00a0 suddenly, the temperature rise at the initial stage of combustion should \u00a0 done slowly. At a temperature of 1000C-1500C all water \u00a0 formers have been lost. At that stage, it can be said that \u00a0 drying process is considered complete.<\/p>\n

b. Evaporation of water chemistry \u00a0<\/strong>
\nSubsequent changes that occur in the process of burning clay \u00a0 at a temperature of 3500C is water chemistry of clay started out. \u00a0 Understanding water chemistry should not be confused as a water-forming, water \u00a0 pores plasticity or water that evaporates during drying. Water \u00a0 chemistry is a part of the molecular structure of clay and not \u00a0 affected by temperatures below 3500C.<\/p>\n

When expressed as a percentage, clay-containing water \u00a0 chemicals by 14% of the total weight. Water chemistry should be sufficient to \u00a0 vaporized in the combustion, so as to prevent the collection \u00a0 vapor pressure which is likely to break down objects. At the time of \u00a0 clay bodies had been burned at a temperature of 5000C, the process will occur \u00a0 dehydration so it is no longer soluble in water or decompose. Clay also \u00a0 will lose plasticity and becomes very brittle so it is not \u00a0 may be recycled or used again.<\/p>\n

c. Complete combustion (oxides) compounds of carbon, carbonate and sulfate. \u00a0<\/strong>
\nAnother important change that occurred in the clay mass \u00a0 during the initial combustion is oxidation or burning completely all non-clay component in oxide compounds, including, among others, organic materials containing carbon and sulfate compounds. Process all ingredients typically oxides would be perfect on the combustion temperature 9000C.<\/p>\n

Because the amount of these minerals is relatively small, it is usually burning oxide can be carried out without a problem. Because oxidation of the three elements above, then the shrinkage fuel will also occur as a result of the movement of clay particles to occupy the space left by these elements.<\/p>\n

d. occurrence of quartz inversion \u00a0<\/strong>
\nAll clays contain certain quartz in bulk. \u00a0 Quartz can disos ialisasikan as complementary mineral clay \u00a0 nature. Quartz can also be added to the clay in the form of sand \u00a0 white (flint). Quartz crystals have a number of different forms- \u00a0 depending on the temperature difference.<\/p>\n

When the temperature changes, the crystal- quartz crystal to adjust to be slightly different structure \u00a0 and followed by a volume change. Therefore, when the temperature of 5730C was \u00a0 achieved, quartz crystal changes the shape of the alpha (c) to \u00a0 beta (d). This change was followed by a slight volume expansion (2%) \u00a0 and vice versa, during cooling, ie at a temperature of 5730C, crystal \u00a0 quartz changed back from beta to alpha or back to form crystals \u00a0 accompanied by the original volume shrinkage. Though \u00a0 changes in a relatively small volume of the mineral quartz, the temperature rise \u00a0 burning must be done slowly to prevent the outbreak \u00a0 objects were burned.<\/p>\n

e. occurrence of vitrification process<\/strong>
\nVitrification process is a melting process silica materials into \u00a0 glass which then enters the pores and make all \u00a0 solidified particles. Agency bervitrifikasi ceramic objects that have been in \u00a0 perfect becomes porous and become watertight. Clay \u00a0 will menggelas at different temperatures, depending on the \u00a0 composition.<\/p>\n

A type of red clay, for example, containing \u00a0 many elements of iron and other mineral impurities, can be burned into a hard \u00a0 and solid at a temperature of about 1000 0 C and may melt into a \u00a0 liquid glass at a temperature of 1250 0 C. Depreciation continues during \u00a0 vitrification.<\/p>\n

Shrinkage is due to the reduced particle size, \u00a0 especially when the particles are approaching the melting point and \u00a0 arrangement of particles increasingly menggelas. Losses burn an object \u00a0 ceramics can exceed 10%. Shrinkage is diverse, large or \u00a0 size depending on the temperature level vitrifikasinya. Clay \u00a0 will melt usually preceded by bubbling phases, \u00a0 boiling and at this point probably will swell in size.<\/p>\n

Case \u00a0 This is called over-firing or too mature. T anah clay mass that has \u00a0 completely burned and mature can be seen from the level of violence, pressure strength, power density or water-resistant, resistant to friction and can be seen from the color and texture.<\/p>\n","protected":false},"excerpt":{"rendered":"

Losses burn a ceramic object is a quantity that can be measured on the shrinking (size) due to the burning object. It was not just because of the evaporation of free water, but because of the changing nature of the chemical and physical properties of clay into ceramic permanently. Soft clay when mixed with water …<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[63],"tags":[4252,4243,4244,4247,4245,4249,4248,4251,4246,4250],"class_list":["post-2004","post","type-post","status-publish","format-standard","hentry","category-clay-body","tag-clayville-testing-station","tag-testing-clay","tag-testing-clay-bodies","tag-testing-clay-bricks","tag-testing-clay-content-soil","tag-testing-clay-for-cob","tag-testing-clay-for-pottery","tag-testing-clay-roof-tiles","tag-testing-clay-soil","tag-testing-clay-soil-drainage"],"_links":{"self":[{"href":"https:\/\/www.tneutron.net\/blogs\/wp-json\/wp\/v2\/posts\/2004","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=2004"}],"version-history":[{"count":1,"href":"https:\/\/www.tneutron.net\/blogs\/wp-json\/wp\/v2\/posts\/2004\/revisions"}],"predecessor-version":[{"id":9152,"href":"https:\/\/www.tneutron.net\/blogs\/wp-json\/wp\/v2\/posts\/2004\/revisions\/9152"}],"wp:attachment":[{"href":"https:\/\/www.tneutron.net\/blogs\/wp-json\/wp\/v2\/media?parent=2004"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.tneutron.net\/blogs\/wp-json\/wp\/v2\/categories?post=2004"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.tneutron.net\/blogs\/wp-json\/wp\/v2\/tags?post=2004"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}