Ceramics, fine paste

This study is concerned with four different mixtures, including kaolinite and calcite (kc) kaolinite and dolomite (kd) montmorillonite and calcite (me) and montmorillonite and dolomite (md). All the mixtures, by weight, were 95% clay and 5% carbonate mineral. The minerals were first ground to a fine powder and thoroughly mixed by hand before heating in a muffle furnace (temperature controlled to within 20 °C). Each mixture was heated for 1 h, air quenched at room temperature, and analyzed by X-ray diffraction. X-ray films were made in cameras of 11.46-cm diameter with filtered copper radiation and exposure times of 6 h. Several wet mixtures that simulated ceramic paste before firing were heated and studied in like manner, but they showed no differences from the dry mixtures. 

Fine Orange ware was made by the Maya from the Classic through the late Post-Classic periods (6th to 16th centuries), and is characterized by a fine texture and compact paste with little or no temper. Together with Plumbate it is one of the more important diagnostic ceramic types for the Mayan culture in Mesoamerica. 

Alkali feldspars find application in particular in fine ceramics where they have the function of fluxes in ceramic pastes and slips for porcelain, china, sanitary ceramics and tiles their content is in the range 10—50%. Feldspars are also used as fluxes in glazes in the glass industry, they serve as a source of AI2O3 and alkali oxides. 

Traditional manufacture of ceramics is based on the use of fine natural raw materials which are capable of producing easily worked plastic mass (paste) with water. The formed bodies maintain their shape. The products are strengthened and the shape fixed by firing at temperatures which were attainable even in the primitive kilns. Kaolin and clays are the main raw materials which exhibit these required properties. 

The clay constituents of the ceramic pastes are produced during raw material processing in. sufficient fineness < 40 pm so that they can be immediately made into a slip by adding water in stirring tubs. This is mixed with the... 

For special purposes (e.g., highchemcialresistance), materials of Group 1 can be lined with substances which by tiiemselves are not suitable for ceramic manufacture (for example, MgO, CaO). For example, according to Goehrens [3], one can apply to the vessel a paste made of a mixture of finely ground, weakly ignited and... 

Bare die and other chip devices are attached with electrically conductive or nonconductive adhesives to ceramic substrates having defined circuit patterns produced by thin-film vapor deposition and photoetching of metals or by screen-printing and firing of thick-film pastes. With recent advancements in fine-line printed-circuit boards, adhesives are also finding use in attaching bare die to PWBs, a technology known as chip-on-board (COB). 

Mazeo FA (2001) Extrusion and rheology of fine particulated ceramic pastes. Dissertation, Rutgers University New Jersey... 

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