I want to thank Ropac International for inviting me to their workshop. Fantastic experience and you should check out their equipment! Check out their website: www.ropac.com.tw
I am pretty involved in the gem world and I would recommend people to wait another 5-10 years before buying a lab grown diamond. When they first became big, like early 2010s, they were $3400/ct for decent quality (natural diamond of the same quality about $6-7,000) you can get that same 1ct stone for about $1200-1500 today. The prices have come down most steeply in the last 5 years, I think they will become dirt cheap sooner than later, probably
Diamond is used for the window through which plasma heating energy is injected into fusion reactors like ITER. This is because diamond is incredibly transparent over a huge range of frequencies, and the thermal conductivity is required to for cooling. They're also used for windows in other vacuum applications, of course, but pushing tens of megawatts through a 180mm diameter, 2mm thickness diamond window has to be the most amazing one. of course, these diamonds are polycrystalline, but still transparent. There's also a company making 100mm wafers of monocrystalline diamonds using a unique technology where the diamond isn't grown on a seed crystal, but on a Ir/YSZ/Si wafer. AuDiaTech in Germany. Supposedly the largest monocrystalline diamonds in the world.
Whilst not Diamond, the windows on the SR-71 Blackbird were made of 1.25 inch thick clear Quartz slabs, this was to resist the extreme heat and pressure of going mach 3+ Just a history tid bit I thought I'd add.
the problem with these types of processes is the steel being used for the chamber they're made it can erode if you use the wrong kind then while crystals are growing BOOM it finally decides to open a crack and your neighbor gets hit with a chunk of pipe going 80mph
This is an outstanding presentation on CVD diamond. One of the first applications for large CVD diamonds, not mentioned in this video, was the manufacture of windows for aerospace applications, Diamond is transparent to light from infrared to ultraviolet wavelengths, and can be used as a protective, optical window for sensors on the front of missiles or aircraft that is the only suitable material able to withstand impact from rain at high speed.
@@Vatsek Good question: Optical-grade synthetic sapphire is well known for its excellent optical properties from IR to UV wavelengths, particularly UV. There is a strong absorption band from F-centres at 200 nm, but this can be removed with suitable treatment, extending the optical window to 150 nm. Sapphire also has excellent mechanical properties; however, it is still not hard enough to resist rain-impact damage at high velocities. Diamond is the _only_ known material which can do this. Also note that sapphire is a birefringent crystal, which can complicate optical design.
The irony is that high quality mined diamonds aren't actually that rare but the diamond houses like DeBeers deliberately restrict the supply. Combine that with the incredible skill needed to polish high quality gemstone and that's why they're still expensive.
No point in mining if no one's buying them De Beers failed to brain wash the newer generation and they killed their own product by making people think that you should only buy new. Makes them worthless as soon as they leave the jewelry store
@@Lazerecho...that, and despite only earning a laughably tiny fraction- because external factors and danger still make it a relatively well paid job locally, if you don't have alternatives.
I want one of the diamond cubes for my desk. Ideally about twice that size. No interest in them cut, but just a nice cube of diamond would be nice to have.
I've been dreaming of asking a local company that makes industrial monocrystalline diamonds if they have any QC rejected pieces like that for this same reason
14 дней назад
I had the same thought! Maybe a good market for any "seconds"?
Artificial diamonds have been produced since the 1906... The same technology today is being used to make indestructible diamond encrusted bi-layer graphene superconductors... F-diamane. "Henri Moissan's method involved using a tube furnace to heat a mixture of fluorine and carbon to high temperatures, causing the carbon to sublime and recrystallize as diamond. This process was later refined and improved upon by other scientists, leading to the development of the chemical vapor deposition (CVD) method for diamond synthesis." How long have they been making SYNTHETIC DIAMONDS (1950's according to mainstream sources)? That would seem like a crucial tid bit of Intel to know.
It is VERY hard to get anything transparent, but it would be interesting to see if they can at least get some polycrystalline stuff without graphite all through it.
Loved this video. Brings me back to my grad school days when I used to work on diamond thin films for solvated electron generation. Another interesting thing about diamond probably most people don't know is its conduction band is actually so high in energy that it has above the energy of an electron in vacuum. As a result, if the diamond surface is properly controlled, it can have something called negative electron affinity and act as a great electron emitter assuming you can get an electron into the conduction band. This effect works not just in vacuum, but gases and liquids too and with amazing results.
As a material sciencentist seeing a video from you being released is always a good day :) Especially because I am working at pacvd and pvd Now it is required for me to watch this video to the end! 😅
@@Charles-Darwin Well, I personally don't use AI at work, but a colleague does use it to analyze effects for Raman spectroscopy and is quite happy with it. What I am doing is more about creating new kinds of coatings that are electrically conductive, which is quite interesting.
I used to run a CVD machine that created diamonds. These were for making UV photodiodes that were for measurment of energy/average power of KrF excimer lasers. The wafers were made of P type SiC then a layer of blue P type diamond then a layer of yellow N type diamond. The finished crystals were only 3x3x0.2mm. The defect rate was very high as well.😂
5:00 Derjaguin is pronounced more like "der-ya-gihn" (forgive the non-use of IPA). He was a titan in molecular physics. There is a surface force approximation named after him as well. His only major blunder, as far as I know, is a paper on the existence of so-called "polywater", which is a fun rabbit hole to go down.
Years ago there was talk of using diamond for semiconductors directly, which was supposed to allow for chips running at 10GHz and very hot temperatures with no ill effect.
Indeed diamonds have a bright future a head of them. Next to all of the other stories in the comments, Some time ago it was found how to make a P-fet on diamond filament, and recently also the N-fet. thus making it possible to make full IC's in diamond filament.
Cutting Tools/Drills and Anti-Scratch Coatings/Screen Protectors are another application. It may be better done with DLC or PCD, but i am imagining a nonstick pan coating using this technology too.
Your channel is a gem, pun intended. Every time I watch one of your videos, I get a glimpse of what the tech industry is doing or has been doing. You do such a good job at presenting information. When you brought up the heat dissipation application of CVD diamonds and mentioned Synopsis buying Ansys for heat transfer simulations, it kinda blew my mind to see a connection like that. Not a surprising connection, but one I didn’t think about until you mentioned it.
The fact that people would want to have “natural” diamonds instead of “synthetic”, if optical, mechanical, and other physical properties are essentially equivalent, is just ridiculous
people don't care, look at perls, the diamond mining monopoly is the one complaing, they know they gonna lose, they're trying to shift the people vision that lab grown diamonds are inferiors, that why they complained, when FTC removed that requiriment, now they can't use that to shift public opinion, they are losing
Diamond has also popped up for the quantum computing community. As mentioned there can be nitrogen defects introduced. Nitrogen vacancy defects in the diamond have come out as a means for qubit generation
Hey dude. I love your channel and it’s absolute science. Respect. Keep being you(making science videos) and I will keep being happy(watching your science videos) as a man can possibly be. Respect
Again, awesome content! I worked in an institute in Michigan that grows diamonds electronic, electrochemical and sensor applications. It's a super interesting semiconductor material, made from cheap widely available raw material. Power electronics, hardened circuits, magnetic field sensor or neuro electrods. Unfortunately, as of now it is not possible to grow them defect free on large areas. Hopefully they will in the future. Thanks BR
There was a cool article by Wired in 2003 called The New Diamond Age that talked about CVD diamonds and the possible future of "diamond semiconducting"
Crazy you mentioned heat spreaders, that is what the CVD machine was originally used for, literally to wick the heat away from stacked laser bar arrays used in welders and higher power DPSSLs. We eventually did runs of DUV phodiodes with it.❤
How are the diamond wafer pre cursors made? Is it possible to buy the unprocessed diamond cubes? They would make an interesting industrial curiosity without the distraction of being formed into jewelry.
I used to sell diamonds for Zales and the natural diamonds were more popular than the manufactured ones. I sold quite a few, but I'd say the ratio is easily 3 or 4 to one. The reason is that the occlusions in each natural diamond are different and it's a selling point to the client to have their own, unique, diamond they can tell from others with a jeweler's loupe. Yes, laser inscription is the standard and every manufactured diamond is laser inscribed. But most clients see the natural diamonds as more valuable since they took the Earth milliions of years to make.
Very few people have such concerns outside of niche markets frequented by the heirs to vast fortunes or the occasional irresponsible clout seeking middle class future divorcees.
Nowadays, manufactured diamonds are indeed cheaper monetarily than mined diamonds. And many people do seem to want the natural diamonds due to the perceived romanticism of it. But that said, other than Canadian diamonds, mined diamonds are not very traceable and are implicated in human rights violations. Not very romantic IMO.
@@benjamindover4337 In some cases yes, in some cases no. It depends on the situation. If you're a more experienced and older seller, you have a clientele built up over years that will come in and buy anything that they fancy. I'm of course speaking from experience I had over a decade ago. The diamond industry was a lot different even then. That shows you how little time it takes for technology to catch up. I was there for only 9 and 1/2 to 10 months but in that time I sold a few nice pieces to be sure. The one carat diamond was our main focus. The only issue I see is that you cheapen the experience and the symbolism is lost if you make diamonds, particularly those for engagements, so cheap. It's something you should have to strive for and it's something that she should have to appreciate. Or else you get another scene like in the movie Baron Munchausen, where she just tosses the diamonds into a growing pile
@@benjamindover4337yeah yeah _you_ don’t see value in it so it must be only a handful of people on the earth who have some esoteric interest. Meanwhile I’ll trust the word of the actual salesman who made a living working for a large corporation who actually made money marketing these.
first of all many thx for ur great stuff as always! about these diamant plates: could they make lenses from them? blades for scalpels, watch "glasses"?
People like diamonds. What is absurd about that? Or are you going to next say that it is absurd that people buy gold for non-industrial purposes as well? These things are market-dictated. People pay as much as something is worth to them. Although, in the case of diamonds, as he alluded to, De Beers holds a near monopoly, and can thus artificially manipulate the price. But, they can only do so much; there still has to be a market.
So youve never bought anything just to show it off? Not a tshirt with a band logo on it, some nerdy computer shit, nothing? If you have, you should be able to understand why people buy jewelry. Anyway stop being a loser
At which point the value is pfft. The original value was in the scarcity and difficulty in obtaining them. All this has done (aside from the industrial benefits) is dilute the value of every other diamond on the planet, each time one is created. If you just like them for the look, that's fine, it's not like there's something wrong with wanting or owning the stones... just remember the numbers seen at the counters are artificially higher and only more so as time goes on as a result of this "ability".
As a jeweler thats a amazing, a lot of tools needs diamonds to cut and polish, but eventually lab diamonds will be just like glass, and the natural ones will probably be mutch more expensive because mining will not be viable anymore, the cool thing is that other gems will get more visibility, personally, clear diamonds are kinda boring.
A few days ago I saw an article about making diamonds at ordinary pressure and reduced temperature in liquid metal. They are still experimenting though.
For me, as nerd, grown diamond is even better thing! "look honey! Our technical culture made this possible! Nanometers in smartwatch, diamonds in ring" ;D
I think there is already an exclusive application for CVD diamonds in anything that needs to be very wide, like 20mm or more. Can't get the thickness but you can get the width. Very difficult and expensive though, so that market won't carry CVD on it's own without some common technology that needs and can afford wide diamond windows or such.
Diamonds are the Girls best Friend. Dupdupdidu. There are a old sing with this phrase in it. First in my mind when Diamond is involved. Good Video as always! The most are totally over my head and not my Mother language, but your Voice and professional to make it easy to watch! That's are really rare in Space of Since because it's Since! Thanks for your hard work to teach a noob like me so extremely hard complex topics! Thanks 👍😎‼️
I think I fall firmly into the middle or upper middle class American market; I wouldn't consider myself "rich", but we have some money in the bank and a vacation property is within the realm of possibilities in the next few years... But when my wife and I got married several years ago, she had zero interest in a diamond at all. She didn't see the value in it, and the reputation of the diamond industry was a complete turn off. The diamond industry might complain that lab grown diamonds are killing their business, but I would suggest their business was already dying, and lab-grown diamonds might be attracting a consumer that never would have bought their product to begin with.
Im more interested in getting some of the off cuts, or flawed cubes to some electrical testing with. I wish though that i had the appropriate skills to use onenofbthose deposition machines. Might be nice to work with a micron to micron layers or wafers.
Oh how I wish I had the equipment to produce sheets of the rough cubes and a good gem cutter to sell them to. Scale what was shown up to say 24 cubes per sheet, and selling 5 sheets would be life changing. For me at least...
A lab at a local school is growing diamond spirals using ethanol/methanol and lasers, potentially for terahertz-wave communication or whatever they want really
He didn’t specifically name ANSYS there, but I concur that this seems to be what he is getting at. I believe he is referring to the Synopsys agreement to acquire ANSYS here, but I could be mistaken in that. That deal still hasn’t completed due to navigating regulatory hurdles (anti-trust things is what my understanding is). ANSYS has lots more software to offer, but Synopsys probably is primarily interested in just that one piece.
It's called money laundering, so your corporation can add value without making a profit, in effect declare a loss. Think about it. Completely legal too.
I believe he is referring to the Synopsys agreement to acquire ANSYS here, but I could be mistaken in that. That deal still hasn’t completed due to navigating regulatory hurdles (anti-trust things is what my understanding is). ANSYS has lots more software to offer, but Synopsys probably is primarily interested in just that one piece.
Would a thin flat diamond work as a good barrier for a heat exchanger? I could see uses in superminiature heat pumps and heat multipliers. Really interesting video. Thanks. Lots to think about. 👍🏻🇬🇧
In most cases, a diamond engagement ring or other diamond jewelry will have a resale value of between 20 and 60% of the amount it cost when it was new.
is the footage at around 7:17 your footage? is so awesome if not also awesome just less interesting i guess edit : commented before the end, turns out it is it's just that he got access to it and not what i was thinking of. i thought considering the knowledge of asianometry i thought he likely working in industry so had access. turns out one of the assumptions was wrong
