Ground-Pressing

To form a f-in.-diam. pellet of Bi4Ti30i2, a sample is first made by mixing 0.47 g. (1 mmole) of bismuth oxide and 0.12 g. (1.5 mmole) of titanium(IV) oxide. The mixture is pressed into pellets with a calorimeter pellet press. The pellets are placed in Alundum or zircon boats and heated at 700°C. for 4 hours. Then the pellets are ground, pressed again, and reheated at a temperature of 920°C. for one hour. 

Pressing operations must be conducted on a barricaded and grounded press, usually in a steel mold with a steel plunger using bronze plates between the plunger surfaces, for which nonsparking stainless steel is preferred. The side of the mold and the sides of the bronze plates should be cleaned before each pressing... 

Ash fusion temperatures set of temperatures that characterize the behavior of ash as it is heated. These temperatures are determined by heating cones of ground, pressed ash in both oxidizing and reducing atmospheres. 

The uranium(IV) oxide produced by the above-described processes is used for the manufacture of uranium(IV) oxide sintered pellets. The uranium(IV) oxide is ground, pressed in e.g. hydraulic presses, then sintered at ca. 1700°C in the presence of hydrogen and thereby shrink to the desired... 

Palm kernel oil (hydrocarbons) Kernels ground, pressed, filtered Soxhlet extraction of oil fractionation on silica ael columns GC/FID identification of components bv GC/MSD i Mg/g 70-87 Tan and Kuntom 1994... 

Stoichiometric amounts of TI2O3, PbO (Fisher), SrO, and CuO are combined in an agate mortar and preheated at 600° for 2 h in flowing oxygen with two intermediate grindings. The powder samples are then ground, pressed into pellets, sealed in a silver bag or fused-silica tube, and subjected to various heat treatments. Preparations of (Tlj, PbJ Sr2Cu05 3 with x = 0-0.3 were... 

Figure 7.1 7 Potential energy curves for the ground and several excited states of C2. (Reproduced, with permission, from Ballik, E. A. and Ramsay, D. A., Astrophys. J., 137, 84, 1963 published by the University of Chicago Press Copyright 1963 The American Astronomical Society)...

Phenol—formaldehyde (PF) was the first of the synthetic adhesives developed. By combining phenol with formaldehyde, which has exceptional cross-linking abiHties with many chemicals and materials, and a small amount of sodium hydroxide, a resin was obtained. The first resins soHdified as they cooled, and it was discovered that if it was ground to a powder with a small amount of additional formaldehyde and the appHcation of more heat, the mixture would Hquify and then convert to a permanently hard material. Upon combination of the powdered resin mixture with a filler material such as wood flour, the result then being placed in a mold and pressed under heat and pressure, a hard, durable, black plastic material was found to result. For many years these resulting products were called BakeHte, the trade name of the inventor. BakeHte products are still produced today, but this use accounts for only a small portion of the PF resins used. 

A process has been developed (139) whereby up to 80% of the oil can be removed from whole, raw peanuts without the use of solvent. In this process, the blanched peanuts are brought to a proper moisture content, pressed mechanically, and then reshaped or reconstituted by dipping in hot water subsequently they can be roasted and salted, or used in confections or other formulations. Defatted peanuts may also be ground into meal and added to cookies, cakes, and many other products, where they impart a distinctly nutty flavor and cmnchy texture. On the other hand, the resulting high grade oil is refined and employed in cooking and industrial products. This process can also be used for pecans, walnuts, almonds, Brazil nuts, cashews, and other nuts (140-142). 

Edible Protein Ingredients. As of the mid-1990s only peanuts and soybeans are converted iato proteia iagredients for use ia food products. Peanuts are hydraulically pressed to remove about 55% of the oil and the pressed peanuts are then ground iato flours and sold raw or roasted for use ia baked products, snacks, and confections. 

The product stream from the kilns is collected in storage bins. Black ash from the bins is fine-ground in a ball mill and fed to a leacher circuit, which is a system of stirred tanks, where it is dissolved in water and the muds are separated by countercurrent decantation. The solution from the decantation is passed through filter presses the muds are washed, centrifuged, and discarded. The filtered product, a saturated solution containing 12—13 wt % strontium sulfide, is sent to an agitation tank where soda ash is added to cause precipitation of strontium carbonate crystals ... 

Fig. 4. Steps ki the manufacture of a disk thermistor A, hall-milled powder B, pressed disk C, skitered disk D, soldered disk E, edge-ground disk F, lead...

National Research GovwiA, Alternatives for Ground Water Cleanup, National Academy Press, Washington, D.C., 1994. 

Barium carbonate of finely controlled particle size reacts in the soHd state when heated with iron oxide to form barium ferrites. Magnetically aligned barium ferrite [11138-11-7] powder can be pressed and sintered into a hard-core permanent magnet which is used in many types of small motors. Alternatively, ground up magnetic powder can be compounded into plastic strips which are used in a variety of appHances as part of the closure mechanism. 

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