Ovens convection

Dry the beads in a convection oven at about 50°C overnight and at about 100°C in a clean vacuum oven for 1 hr. 

The films were then thermally cycled at tOO, 200 and 300°C for an hour at each temperature in a forced air convection oven to complete the cyclization. The solution imidization procedure has been further described by Summers, et. al. (42,43). A representative structure for the poly(imide siloxane) copolymers is depicted in Figure 5. 

Samples for analysis were prepared by spin-coating Si substrates from cyclohexanone solutions of 2,6-dinitrobenzyl tosylate and TBMS or TBS. The samples were prebaked at 90 C for 15 min in a convection oven, and analyzed after exposure and heating at 120 C for 30 min. The films on each substrate were dissolved with 5 ml of THF and a 1 ml aliquot of 0.1 vol % benzene in THF added. Finally, the solutions were diluted to 10 ml with THF, and IOOjj.1 injected onto the GPC for analysis. 

The new resist was spin-coated on a silicon substrate and baked for 20 min. at 80 t in a convection oven. 

Dissolution Measurement. Resist solutions 1n mixtures of Isoamyl acetate/cyclohexanone/methyl Isobutyl ketone (90 5 5 by volume) were filtered through 0.45 pm disc filters, then spin-coated onto silicon wafers at about 2000 rpm. The coated wafers were prebaked 1n a convection oven at 90°C for 1 hour, then stored 1n a desiccator. The basicities of the alkaline solutions were titrated by a standard HC1 solution with a Fisher Accument pH meter, Model 805 MP. The film thickness 1s about 2 pm. Resist dissolution was measured by a He-Ne laser Interferometer 1n a thermostated bath at the desired temperatures (12.131-... 

Drying and milling the resulting wet pigment presscakes, possibly preceded by extrusion or granulation, finally affords the desired pigment powder. Drying may be carried out either by a continuous process on a conveyor belt or as a batch operation in a convection oven. 

C.2 Engineering Consideration. The primary engineering considerations in prebaking are the selection and maintenance of baking ovens. Several types of ovens such as forced air convection ovens, conduction ovens, and infrared heated ovens are commonly employed. The main requirements for baking hardware are ... 

A five-cell stack (with a structure identical with that of the 30-cell stack) and a column of Drierite (anhydrous CaSO (W.A. Hammond Dryerite) used for trapping water vapor in the stack cathode exhaust stream were placed inside a convection oven set at the stack operating temperature. A T-valve was used to separate the water vapor and liquid water by gravity. The liquid water was directed to the outside of the oven with a peristaltic pump set at a flow rate of 1 mLmin , which was slightly higher than the flux of liquid water from the stack cathode exit but significantly lower than the cathode feed rate. The liquid water thus separated from the stack cathode exhaust stream was collected vdth a conical beaker placed... 

Gravity convection oven (Sheldon Manufacturing, Inc., Cornelius, OR, model 1370 FM). 

The heating phase for melting the powder is crucial to the final surface quality. The heat-up should be fast but uniform. The ovens used to melt the powder on the part can be convection, infrared, or combination (hybrid) ovens. Infrared (IR) or combination (IR/convection) ovens are most widely... 

Large-mass parts Conventional coating of large-mass parts requires exceedingly long times in convection ovens. A considerable reduction of times required for cure is to melt the powder with IR and use fast UV-initiated free radical curing reactions. 

Adsorbents. The macroreticular resins XAD-2 and XAD-4 were separately suspended in distilled water, and the suspensions were stirred to leave the fine particulates floating. These fines were removed by decantation of the supernatant layer. This operation was repeated until no opalescence was noticeable in the supernatant layer. After filtration through Whatman no. 1 filter paper and washing with methanol, the resins were dried at 70 °C in a convection oven prior to further purification. The average weight per milliliter of the resin was found to be 0.40 0.02 g. 

Basic Protocol Measuring Moisture Using a Convection Oven Al.1.1... 

This unit provides three protocols for which there are established procedures for various matrices. The Basic Protocol describes water removal and quantitation after a sample is placed in a convection oven. It is probably the method of choice when one does not know which method to choose when dealing with an unknown matrix, or when one looks at samples that foam excessively in the vacuum oven method or react, such as popcorn under vacuum. Alternate Protocol 1 describes water removal and quantitation after a sample is placed in a vacuum oven. Because it is at reduced pressure, drying times are slightly reduced compared to the convection method. In addition, drying temperatures < 100°C are possible, which is important for samples that may decompose at higher drying temperatures. Alternate Protocol 2 describes water removal using a microwave source where such analyzers measure and calculate loss automatically. 

Water is measured in a sample by determining the loss in weight for the sample after it has been dried in a convection oven. The method requires only a small amount of homogeneous sample and can measure an effective range of 0.01% to 99.99% water. 

Convection oven capable of maintaining a temperature of 103° 2°C Aluminum weighing dishes (with or without covers)... 

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