What Does kleding Mean?
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By hierdie hoë temperatuur "smelt" die kleideeltjies as 't ware ineen en phrase die skerf so dig dat dit heeltemal ondeurdringbaar is. Meestal phrase grès, wat 'n blougrys of bruin kleur het, bedek satisfied 'n "glasuur" wat ontstaan deur sout in die brandende oond te strooi. 'n Dun lagie slaan dan op die voorwerpe neer.
Ceramic chemistry – Science and know-how of making objects from inorganic, non-metallic materialsPages displaying limited descriptions of redirect targets
Below its existing identify, Gradac was described for the first time in 1649. It had been named once the stronghold that was located about the elevation above the present-day church of St. Michael, and which was constructed almost certainly through the Cretan War (1645–1669) like a defence in opposition to the Ottoman Empire.
In the early nineteen eighties Toyota investigated production of an adiabatic motor utilizing ceramic components in the recent fuel region. The usage of ceramics might have authorized temperatures exceeding 1650 °C. Benefits would come with lighter products as well as a scaled-down cooling method (or no cooling system at all), leading to main excess weight reduction. The expected maximize of gas efficiency (as a consequence of increased operating temperatures, shown in Carnot's theorem) couldn't be verified experimentally. It had been found that warmth transfer on the hot ceramic cylinder wall was bigger than the heat transfer to the cooler steel wall.
Keramiek is 'n versamelnaam vir alle voorwerpe wat uit klei gevorm en na droging aan 'n hoë temperatuur blootgestel word sodat 'n reaksie in tree wat nie onmerkbaar is nie. Die klei wat gebruik word, besit die eienskap dat dit deur die byvoeging van 'n bietjie h2o breibaar term, en deur die byvoeging van meer drinking water in klein deeltjies opbreek en vloeibaar term.
Hierdie soort potte phrase vandag nag deur baie van die Swart volke vir huishoudelike gebruik gemaak. Nomadiese volke soos Khoi, Strandlopers en San het ook heelwat pottebakkerswerk gedoen.
Glazuur is eigenlijk een dun laagje glas. Het hoofdbestanddeel van glas is silica. Het smeltpunt van silica ligt veel hoger dan de temperatuur van de oven website en dus moet er een zogenaamde flux aan het glazuurrecept worden toegevoegd om het smeltpunt te verlagen. De verschillende glazuren zijn genoemd naar het kind flux dat ervoor is gebruikt, zoals loodglazuur, alkalische kalkglazuur, en porselein glazuur (waarvoor porseleinsteen is gebruikt).
In Bisantium is daar tot fulfilled die val van die stad in 1453 veral twee soorte erdewerk gemaak: voorwerpe met 'n gestempelde reliëfile onder 'n deursigtige glasuur- sodat die rooi skerf sigbaar was- en, veral na ca. 1200, voorwerpe satisfied versierings in die graffito-tegniek achieved motiewe van determine, diere en blare.
These materials do demonstrate plastic deformation. Having said that, as a result of rigid composition of crystalline materials, you will discover very few offered slip methods for dislocations to maneuver, and in order that they deform really bit by bit.
En het 'n besondere hoë glansafwerking gehad. In die Romeinse Ryk is gebruiksvoorwerpe van terrasigillata vervaardig: keramiek van klei wat tydens die bakproses rooi verkleur, besonder dun uitgewerk kan phrase maar tog baie tricky is, en bedek is satisfied 'n glansende rooi of soms swart sliblaag.
Ceramics are chemically proof against corrosion and they are favored for environments in which steel bearings would rust. In certain applications their electrical power-insulating properties are advantageous. Negatives to ceramic bearings consist of appreciably bigger Price, susceptibility to break underneath shock loads, as well as the prospective to use steel areas on account of ceramics' larger hardness.
Ceramic ball bearings can be used rather than metal. Their larger hardness ends in decreased susceptibility to don. Ceramic bearings commonly previous triple the life time of steel bearings. They deform less than metal less than load, causing considerably less contact with the bearing retainer walls and lower friction. In pretty significant-pace programs, heat from friction will cause a lot more problems for steel bearings than ceramic bearings.
Steengoed of gres wordt gemaakt van een gresklei en kan worden gebakken bij hogere temperaturen (1200-1300 °C); hierbij versintert de klei, het item is geschikt voor het bewaren van vloeistoffen.
Equally are valued for their abrasion resistance and so are as a result Employed in programs like the don plates of crushing equipment in mining functions. Superior ceramics are used in the clinical, electrical, electronics, and armor industries.