Page 658 - Materials Chemistry, Second Edition

CAT3525_C22.qxd 1/27/2005 1:00 PM Page 629
Electronics Waste 629

TABLE 22.4
Weight of Glass and Pb Contents for CRTs
Screen Size Total Glass Total Pb in Lead Total Pb in No-Lead
Weight (lb) Panel CRT (lb) Panel CRT (lb)
Portable and Table Televisions
8" and below 12.9 1.30 1.08
9" and 10" 15.0 1.47 1.21
13"and 14" 17.2 1.75 1.46
20" 28.2 2.70 2.21
25" 43.5 4.05 3.28
29" through 31" 81.2 7.99 6.62
35" 117.4 11.28 9.27
Console Televisions
26" and below 48.8 4.54 3.68
27"–32" 68.5 6.61 5.44
35" and above 117.4 11.28 9.27
Monitors
14" 19.7 na 1.68
15" 19.7 na 1.68
17" 25.7 na 2.08
19" through 21" 28.0 na 2.28
Source: Reproduced with kind permission of the Electronic Industries Alliance,
Arlington, VA.

Frit
70−85% Pb

Shadow mask
Phosphor-coated screen

Neck
Cathode

Anode

Electron Glass funnel Glass panel
gun 22−25% Pb (face plate)
2.3−2.8% Pb

FIGURE 22.1 Cross section of a CRT showing Pb contents. Reproduced with kind permission of the Silicon
Valley Toxics Coalition, San Jose, CA.