Ceramic manufacturing process

CVI [Chemical Vapor Infiltration] A ceramic manufacturing process in which the pores of a matrix are filed by CVD. 

The advantages over natural crystals are the subsequent polarizability, very high permittivity, chemical resistance, free possibility of forming and low-cost manufacturing by the ceramic manufacturing process. 

This chapter will describe some of tire basic unit processes in ceramic manufacturing, and will touch on tire pertinence of tire physical chemistry of surfaces in selected unit processes. For a more comprehensive review of ceramics and ceramic processing, tire reader is referred to otlrer sources [3, 4 and 5]. 

Figure C2.11.1. A flow chart summarizing tire ceramic design and manufacturing process.

Processing is key to the reproducible manufacture of ceramics. The tolerance of a finished ceramic to defects determines the raw materials selected, and the control that must be exercised during processing. More expensive advanced ceramics require higher quaUty, more expensive raw materials coupled with more carefully controlled manufacturing processes. 

Cera.mic, The ceramic substrate is made from a mixture of siUcon dioxide, talc, and kaolin to make the compound cordierite [12182-53-5]. Cordierite possesses a very low coefficient of thermal expansion and is thermal-shock resistant. The manufacturing process involves extmding the starting mixture (which is mixed with water and kneaded into a sort of dough) through a complex die to form the honeycomb stmcture. The extmded piece is dried and fired in a kiln to form the cordierite. The outside or circumferential dimension is formed by the die, and the length is cut later with a ceramic saw. 

HBF4 (aq) and metal fluoroborates electroplating of metals, catalysts, fluxing in metal processing and surface treatment. HzSiF6 and its salts fluoridation of water, glass and ceramics manufacture, metal-ore treatment. 

Scholtz, J. H., et al., High Performance Ceramic Fibers by CVD TQchnologyC Materials and Manufacturing Processes, 6(3) (1991)... 

Bacteriological sulfur, 23 577-578 Bacteriophages, 3 135 12 474 in fermentation, 11 46 Bacteriorhodopsin, 20 826, 840 photochromic material, 6 603 Bacteriosins, 12 76. See also Bacteriocins Bacteriostatic water, 18 714 Bacterium lactis, 11 7 Baculovirus expression system, 5 346 Baddeleyite, 21 489 26 623-624 colorants for ceramics, 7 346t Badische Anilin und Soda Fabrik (BASF) terpenoid manufacture process, 24 481 Baeyer-Villiger oxidation reactions, 14 592 chiral recognition by enzymes, 3 675 microbial, 16 401 Baffled shellside flow, 13 262 Baffles, in stirred tank geometries,... 

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