Negative electrode assembly preparation

Cut the monel wire mesh for the negative electrode to dimensions as shown in the diagram on the previous page. This will give you a 6 x 93/8 piece with a /4 wide 

To make the pleats, mark the fold points on each side of the screen (see illustrations). The fold points should be /8 apart. Begin folding using a ruler along each fold line as shown in the illus- 

Drill a hole in the center of the pipe cap for the bottom cap to accept a 10/24 screw. Then, center the 1 PVC cap inside the cap, and draw an outline with pencil. The 10/24 screw hole should be dead center within this outline. Drill a 3/8 hole between the inner wall of the 3 PVC cap and the circle outlined for the 1 PVC cap (see illustration at right). This /s hole is the electrolyte entry port. Cut and epoxy the 3/8 barb connector into the hole. 

Drill a hole in the center of the 1 inner diameter (ID) PVC cap to accommodate a 10/24 screw. Make a 1 nickel alloy washer. Apply a small amount of silicone 

Inside the bottom cap, showing guide outline, center screw hole, and electrolyte entry port 

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The obtained a-PbO particles are of median diameter of 0.530 pm [26]. Karami and collaborators [27] conducted the chemical reactions in the presence of ultrasonic waves (sono-chemical method) with the aim to reduce the size of the resultant particles. Under these conditions, a-PbO particles of 20—40 nm particle size are obtained. The thus synthesised PbO powder is used for the manufacture of positive plates for small laboratory test cells. Commercial negative plates are used as counter-electrodes. The test cells are set to cycling along with analogous cells assembled with commercial plates prepared with ball mill leady oxide. Figure 5.16 presents the obtained cycling test results for the two types of cells. 

As the ion beam, passing through the interface shown in Figure 4.2, enters the mass spectrometer, a negatively charged extraction electrode is used to attract positive ions and transport them into the electrostatic lens assembly. This assembly further focuses the ion beam and prepares it for ion analysis by the mass spectrometer. 

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