All computer electronics use silver solder. The older the computer electronics are, the greater the ratio of silver is in the solder. Back in the late 1980s I used silver solder that was 42% silver.
Started out with about 1.7g of Pd bottun (recovered from about 250g monocaps)
and endded up with 1.3g 999.5 Pd.
I'm not sure about the tiny resisrors in terms of noble metals yield, but i do know that resistor chips does contain Pd/Ag as well as RuO2 as resistor material, but it's not worth recovering the ruthenium.
@indeedItdoes I read in a manufacturers spec on surface mount resistors that the Pd/Au thin film (not Pd/Ag) content was 4% by weight, Ag is in the connector pads and there is a minute trace of ruthenium.
@indeedItdoes I saw this when I was on a plant visit in college in the late 1990s. I have a tendency to remember crap like that but not formuli for tests :) The older the components, the more presious metals they have. I have a small roll of really thin silver solder that says 42% silver on the lable, the roll is circa 1987. Current silver solder does not mention metal ratios. Most mother boards prior to 1990 had gold traces now alnmost all is copper.
Awesome work, as always. I'd like to see one done on scrap catalytic converter refining. As you may know, those contain a ceramic compound coated with a thin layer of platinum, palladium, and rhodium.
@Zanragnar The current 3-way catyletic converters contain various levels of the entire platimun metals group, some just do not exist without others and are very hard to seperate. The onlder the vehicle, the greater thickness of the metal coating. I had a breakout of the mtals per kg of converter material but can not find but do remember one for a midsized car would yield ~$450 revenue in July pricing.
All computer electronics use silver solder. The older the computer electronics are, the greater the ratio of silver is in the solder. Back in the late 1980s I used silver solder that was 42% silver.
Robbob9933 5 months ago
what was the weight of the palladium u refined?
I know you started with 17.9 grams of the capacitors.
what about the tiny resistors? don't they have any precious metal?
Thanks
spacebrdcst 6 months ago
@spacebrdcst
Started out with about 1.7g of Pd bottun (recovered from about 250g monocaps)
and endded up with 1.3g 999.5 Pd.
I'm not sure about the tiny resisrors in terms of noble metals yield, but i do know that resistor chips does contain Pd/Ag as well as RuO2 as resistor material, but it's not worth recovering the ruthenium.
indeedItdoes 6 months ago
@indeedItdoes I read in a manufacturers spec on surface mount resistors that the Pd/Au thin film (not Pd/Ag) content was 4% by weight, Ag is in the connector pads and there is a minute trace of ruthenium.
Robbob9933 5 months ago
@Robbob9933
Hi Thank you for your comments.
Can you PM me the link to this spec sheet?
indeedItdoes 5 months ago
@indeedItdoes I saw this when I was on a plant visit in college in the late 1990s. I have a tendency to remember crap like that but not formuli for tests :) The older the components, the more presious metals they have. I have a small roll of really thin silver solder that says 42% silver on the lable, the roll is circa 1987. Current silver solder does not mention metal ratios. Most mother boards prior to 1990 had gold traces now alnmost all is copper.
Robbob9933 5 months ago
Awesome work, as always. I'd like to see one done on scrap catalytic converter refining. As you may know, those contain a ceramic compound coated with a thin layer of platinum, palladium, and rhodium.
Zanragnar 8 months ago
@Zanragnar
Thanks.
One of my next projects is converter beadt PGM's recovery.
Sam
indeedItdoes 8 months ago
@Zanragnar The current 3-way catyletic converters contain various levels of the entire platimun metals group, some just do not exist without others and are very hard to seperate. The onlder the vehicle, the greater thickness of the metal coating. I had a breakout of the mtals per kg of converter material but can not find but do remember one for a midsized car would yield ~$450 revenue in July pricing.
Robbob9933 5 months ago