Carbon molds

The block diagram of the above mentioned process is shown in Fig.l. Figure 2 shows schematically a carbon mold filled with preformed disks of SiGe material having different doping concentration. Typical sintering conditions are 25 SOMPa in pressure, around 1,285°C in temperature, and 1 2 minutes in time. In the last step, the sintered material was cut into a size having a... 

Molding/carbonization Molded graphite Vitreous carbon... 

Glassy carbon mold fabricated from release force depends on coating with chromium and fluorinated silane... 

He atmosphere. The melt was maintained at temperature for -- 30 min and furnace cooled. The resulting product was ground, placed in a carbon mold, and cast as a cylinder under a static He atmosphere, Hampl [8]. 

To prepare the standard pH buffer solutions recommended by the National Bureau of Standards (U.S.), the indicated weights of the pure materials in Table 8.15 should be dissolved in water of specific conductivity not greater than 5 micromhos. The tartrate, phthalate, and phosphates can be dried for 2 h at 100°C before use. Potassium tetroxalate and calcium hydroxide need not be dried. Fresh-looking crystals of borax should be used. Before use, excess solid potassium hydrogen tartrate and calcium hydroxide must be removed. Buffer solutions pH 6 or above should be stored in plastic containers and should be protected from carbon doxide with soda-lime traps. The solutions should be replaced within 2 to 3 weeks, or sooner if formation of mold is noticed. A crystal of thymol may be added as a preservative. 

Polycarbonate acrylonitrile-butadiene-styrene alloy Allyl-diglycol- carbonate polymer Diallyl phthalate molding Cellulose acetate Cellulose-acetate-butyrate resin... 

Injection stretch-blow molding may be performed on a single one-stage machine in sequence or on two independent sequential two-stage machines. PET carbonated beverage botties are usually produced by injection stretch blow molding. 

Synthetic Marble. Synthetic marble-like resin products are prepared by casting or molding a highly filled monomer mixture or monomer—polymer symp. When only one smooth surface is required, a continuous casting process using only one endless stainless steel belt can be used (52,53). Typically on the order of 60 wt % inorganic filler is used. The inorganic fillers, such as aluminum hydroxide, calcium carbonate, etc, are selected on the basis of cost, and such properties as the translucence, chemical and water resistance, and ease of subsequent fabrication (54,55). 

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