Thread: Chromium Oxide 1.0?

Just for the record, 50 microns is HUGE compared to anything we would ever use for honing.

I belive that would be roughly the equivalant of a 300 grit hone. Not sure you'll be able to accomplish anything useful with it on a razor.

On the other hand, if you've got some trash blade lying around, give it a go and see what happens. Worst case scenario, they're still trash blades when you're done.

Originally Posted by VeeDubb65

Just for the record, 50 microns is HUGE compared to anything we would ever use for honing.

I belive that would be roughly the equivalant of a 300 grit hone. Not sure you'll be able to accomplish anything useful with it on a razor.

On the other hand, if you've got some trash blade lying around, give it a go and see what happens. Worst case scenario, they're still trash blades when you're done.

Oh, no doubt 50 microns is "coarse". Knowing full well what grit equivalent that would roughly translate to I ordered a packet out of curiosity and to have on hand in case I feel like dreaming up some sort of experiment. Setting a bevel with chrome ox. At the level we use it at, it does seem like an oxymoron. I don't know that 50 microns would stay 50 microns in actual use or if it would reduce rapidly in crystal size to something somewhat smaller.

Chris L

I don't know either, but I'll be curious to see what sort of results you get.

This has me pondering a different question.

Given that Chris' source can offer 50 micron grit sizes that are ground to that specific size, can I grind down some .5 micron to a smaller size? I have a mortar and pestle and an extra flat bed strop on the way.
Would this be worth the time and effort? Would a mortar and pestle be sufficient for the task?

Sorry to derail.

BTW, thanks ya'll for the discussion. It's got quite a few of us thinking (which is always good).

Yes you could, but it's probably not worth the effort because a mortar and pestle wouldn't allow you to controll the size of the end result. Some would still be .05, some would be smaller, and they'd all be very inconsistant.

Originally Posted by ChrisL

Oh, no doubt 50 microns is "coarse". Knowing full well what grit equivalent that would roughly translate to I ordered a packet out of curiosity and to have on hand in case I feel like dreaming up some sort of experiment. Setting a bevel with chrome ox. At the level we use it at, it does seem like an oxymoron. I don't know that 50 microns would stay 50 microns in actual use or if it would reduce rapidly in crystal size to something somewhat smaller.

Chris L

Well, as i know, the reason is, that CrO was used for polishing metal, is that it's much harder, than the steel. So, porbably You can break the crystals, but i don't kniw how. If You can find out the hardness of it, You can probably figure something out. But i'm pretty sure if You want to use it for metal polishing, or as an abrasive, You will have to work hard&long with it.

And that's where things get really complicated. Hardness and durability are not always the same thing. I'll be very interested to see what comes from it.

hello hi_bud, I hope your question has been answered.
I can very well understand you and hope so do you (because my english is pretty bad)

"Cr2O3" is the smallest compund that repeats itself in a material.
That does not mean anything made of Cr2O3 will consist of only one Cr2O3 molecule.
Cr2O3 comes in a configuration as well.
You can see that in the second picture here Chromium(III) oxide - Wikipedia, the free encyclopedia

or here File:Eskolaite structure.jpg - Wikipedia, the free encyclopedia

you see the moleculs consisting of Cr2O3 actually bind together.
(red is Oxygen white is Chromium I think)
So in one single piece of Cr2O3 you actually have a lot of accumulated Cr2O3 molecules.
Cr2O3 is a substance that will form crystalls.
And Crystalls are nothing more than accumulated molecules.

I don´t know if there is a difference in US and Eu Sugar,
but I know that there are way different sizes in Salt.
That would be exactly the same phenomena.

If the sizes of Chromium oxide particles can be taken from its atomic specifications,
why are there varyances in the size of grain at all?
0.5 micron Cr2O3 does have particles below 0.5 and above.
This would not be possible if a Cr2O3 particle would consist of one Cr2O3 molecul only.

Btw. one chromium atom is 128 pm of size
and let´s say Oxygen has 152 pm
together Cr2O3 would theoretically have 560 pm
that would be 560 / 10.000.000.000.000 m
It´s just an example and not actually the size of a Cr2O3 molecule.
0.5 Cr2O3 has an average particle size of 0.5 / 1.000.000 m



And Yes you could break down the particles even more,
but not by using a mortar. They are just too small and hard already.
You could only filter out the smaller particles sedimentary

I did response early and i hope was clear. i never mention chr2o3 has particular size example 0.5 or 1.0 micron. i didn't know what size it has now i know after checking it).I mean to chr203 size weight etc will not change.
This is simple as it can get.
if you want to melt,froze anything else and change configuration of the molecules or joining among them that is different story.
But simple chr2o3 is same and will stay same doesn't matter where or how you get it.
chr2o3 has 2 chro and3oxgen right?
now if you add million more 2chr+3ogxygen you will get 1 kg right
next lets add 5 million more 2chr+3oxyge now you will get 5 kg of it.(those are just examples)
size is bigger and weight is different.
I understand this but i hope you will try understand below.
Lets say
chr2o3 has 100 molecules together and right weight is 100gr
next we do heat it up particular temperature and instead of
2chr +3oxygen we have added 100 extra only oxygen
NOW LETS SAY OXYGEN JOIN THEM AND MAKE INSTEAD OF CHR2O3 YOU WILL HAVE CHR205.NOW THIS MATERIALS WEIGHT AND CHARACTERISTICS WILL BE DIFFERENT.IT WILL ACT TOTALLY DIFFERENTLY ETC.IT WONT BE chr2o3 any more

I hope this helps and clears what i was trying to say.

I´m sorry but this doesn´t make sense.
The chemical formular Cr2O3 has clearified as true for the smallest
compund repeating itself.
You will never get one single Cr2O3
The word "Cr2O3" is an idialisation for chemical reaction only.

There is no way of changing Cr2O3 to Cr2O5
It simply does not exist.
Chromium has exactly 3 arms. He can grab 3 things.
Oxygen has 2 arms.
So if two chromium will grab five oxygen there will be some arms left
to grab something. This is not possible.
There are exceptions of course but for explaination purposes it will do.

Chromium oxide molecules will stick together to a certain extend.
Two Cr2O3 meet and will actually COMBINE.
Maybe even 100 do so. This way a crystall is being formed.
This crystall can be seen like a single peace of material
consisting of 100 Cr2O3.
This crystall will be ONE chromium oxide particle
of any given size depending on the amount of Cr2O3 accumulated.
It will have the size and the weight of 100 Cr2O3

If there has been growing a crystall at one point
there will be formed another somewhere else.
This crystall will consist of 100.000 Cr2O3.
It will have a considerably larger size but still will be one piece of (many) Cr2O3
there can be formed another crystall at another