local copy: CRT phosphors original: http://www.phosphor-technology.com/crt.htm
is a link to one CRT phosphor manufacturer's page.
Notice that phosphor compounds containing Silver (compounds that
contain Ag) are still being manufactured and
offered for sale:
P11-BE GL47/N-C1 ZnS:Ag 0.147 0.076 6.5
P11-BE GL47/F-C1 ZnS:Ag 0.147 0.076 3.0
P20-KA GJL47/N-C1 (Zn,Cd)S:Ag 0.297 0.571 8.0
P20-KA GJL47/F-C1 (Zn,Cd)S:Ag 0.297 0.571 3.5
P20-KA GJL47/UF-C1 (Zn,Cd)S:Ag 0.297 0.571 2.1
P22-X (B) GL47/N-C2 ZnS:Ag 0.148 0.063 8.0
http://www.phosphor-technology.com/xray.htm lists x-ray production phosphors that the company manufactures.
The manufacture of these phosphors:
JGL47/L-R1 (Zn,Cd)S:Ag 20.0 RED
JGL47/S-R1 (Zn,Cd)S:Ag 10.0 RED
JGL47/F-R1 (Zn,Cd)S:Ag 6.0 RED
as phosphors intended specifically for x-ray production, ought to
be internationally outlawed.
local copy: OSRAM
SYLVANIA Chemical & Metallurgical Products - Phosphors for
Cathode Ray Tubes original: http://www.sylvania.com/beyond/chem/cathray.htm
From Sylvania (A large TV / picture tube / phosphor manufacturer,
best known for light bulbs and TV sets):
1330 ZnS:Ag Blue 450 55 MS P-22, color TV1,2
1331 ZnS:Ag Blue (wide gamut) 450 55 MS Color
TV, data display
Somewhat of a tutorial on CRT operation:
local copy:Winn L_ Rosch
Hardware Bible, Electronic Edition, Chapter 17 original:
http://viking.delmar.edu/courses/Cis312J/EBOOK/wrh17.htm
Good news: Here is a new phosphor technology that may make
high voltage CRTs obsolete:
http://www.nanox.co.uk/about_nanomaterials/feds.html
http://nc.eedept.kobe-u.ac.jp/~yagi/research/fed.html
Bad news: This new technology page describes a potential
problem newcomer:
http://www.futron.com/bmdo/1SBIR/1996/421.HTM
"It is the goal of the phase I effort to develop direct band
gap semiconducting quantum dots of CdS along with doped ZnS sots
with activator ions including Ag+ and a host of transition metal
ions."
Somewaht more technical backgroud as to the operating
principles of and repair of television, although I'm sure there
are sources that are more specific:
http://www.bithose.com/serfaq/REPAIR/F_tvfaq.html