does anyone know what the materials normally are for rectifiers? its just that ive been mucking around with different materials and found one that gives a very stable DC analog read out n just want to know how similar it is to others.
the materials normally are for rectifiers
Silicon diodes are normally used these days.
In the old days selenium was used but not now.
Mercury arc all the way baby!
gardner:
Mercury arc all the way baby!
Yes they were the business. 
I remember one lighting up the local telephone exchange when I was a kid. The place is an Indian Restaurant now.
gardner:
Mercury arc all the way baby!
Did you know. The first radar systems used a tank full of mercury as a delay line. Now not a lot of people know that!
Hi there are quite a few ways of making a diode type component it depends on the application and technology involved.
What have you found to be a good diode combination?
Tom.........
Some of them are truly bizarre -- eg flame rectification, electrolytic rectification. One that's interested me is tungsten/argon.
Schottky barriers can be achieved with all sorts of metal/metal oxides/sulphides. My guess is that the O/P has stumbled on one of these. Possibly not new to science.
Give me galena and a cats whisker any day.
Germanium is another good standby.
Weedpharma
I still like thermionic valves but am curios as to what the OP has found.
Did you know. The first radar systems used a tank full of mercury as a delay line. Now not a lot of people know that!
yep did not know very cool. TRYING to understand radar systems at the moment actually. seems kinda like something useful after the triviality of that missing aircraft situation.
author=arduidiot link=msg=1996826 date=1418283153]
Did you know. The first radar systems used a tank full of mercury as a delay line. Now not a lot of people know that!yep did not know very cool. TRYING to understand radar systems at the moment actually. seems kinda like something useful after the triviality of that missing aircraft situation.
i made copper sulphate - acetone crystals and crushed them to a fine powder. then put the contents inside the ends of a blown fuse and inserted electrodes on each side and adjusted their length until i got the smoothest V(t). i havent got round to a comparitive study so its probably complete shite wrt to standards
and props to the guy that guess the ionic composition as being a metal oxide, close enough nice one!
arduidiot:
Did you know. The first radar systems used a tank full of mercury as a delay line. Now not a lot of people know that!
yep did not know very cool. TRYING to understand radar systems at the moment actually. seems kinda like something useful after the triviality of that missing aircraft situation.So the reason for the delay line was to compare one return signal against the previous. By using the delayed signal as a reference all static objects were removed from the signal. It was only items that had moved from one scan to the next that were registsred. This therefore removed all the clutter of stationary buildings, trees etc..
This therefore removed all the clutter of stationary buildings, trees etc..
There is a famous UFO case involving "evidence" being multiple radar pings at different military bases where as they were including all erraneous pings as they were obviously not that great in signal analysis. Im thinking what you mentioned would have come in handy in debunking this and hence reducing the mass of crap the internet is accumulating.
Copper oxide rectifiers were big once - copper oxide is very interesting material as
it as has semiconductor properties and copper and oxygen are involved in one of the
high-temperature superconductor recipes.
You are right MarkT that IS an incredibly curious collection of subsets isn't it. i love chemistry and well lets face it we all have weaknesses and well i cant do much sample prep ive made a huge number of quite complex organics and so the crystals from mixing in a copper sulphate were really the only point of having made them after carrying out the procedure n besides i just lack to common sense experimentally at this point so i dont really do much at the moment.
I couldnt make a low temp super conductor. I mean i started by making ionic solutions i think another one that show rectification charateristics was the crystals when acetone was mixed with Aluminium sulphate n it made some complex with the Al ions. of course putting a charge behind Al is a bit like a putting a collar on shrodingers cat when it comes to those complex bastards but theres certainly a wealth of experimentation to be done.
Also Tungsten Carbide ( a tile cutting drill bit lol) seemed like a trouble maker in the way it dissolved in hydrochloric conc.