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Affordable nano powder handling

Written by Robert Greenyer on .

It is exciting times here because in the next 10 days we expect to receive 75um powder from Dr. Brian Ahern and 10nm Ni from Quantum Sphere to join the special powders Bob Higgins has produced, which are also in the micro-metric range.

Brian's 10nm Ni/Pd islands in ZrO grains will need significant further processing to get them down to around 15um and this will take some weeks of grinding and we are still discussing how best to do that as the raw material is very precious.

Bob Higgins' and Brian's powders are big enough, even after grinding to operating sizes, to not loft easily (do not become airborne) and they also do not present the same health hazard that the 10nm QSI Ni may present, from inhalation, skin and eye exposure. That is not the only challenge Ni at this size presents as Ryan found out when handling their 40nm Ni powders... with even just a little humidity, these particles start to clump together and then become difficult to handle and potentially inactive. So we need to find a way to safely handle these materials whilst keeping them dry, some of the early options we were considering looked really expensive, but Alan Goldwater has been doing some great work trying to make this part of the process affordable.

First was the getting the cost of the "glove box" down... In Alan's words "Barring some serious DIY, a dry glove box looks to be expensive, even used. The basic CLEATECH plastic ones are $1k+ on eBay, and the metal ones more." That is not really practical for wide scale testing, so he looked for other options and found that a glove bag purged with Argon or Nitrogen could work with a variety of sizes available for $20-30...

Glove bag supplier 

Alan adds "The nice thing about a glove bag is that after loading it, you can collapse and squeeze it to get the air out, then inflate it with dry gas. Seems to me 2 cycles of that should get down to less than 10% relative humidity (RH). So figure 4 cubic feet of gas per use (for the smallest size bag from the above source). Another advantage is that when you're done with the job, just crumple the bag up and toss it, so nano-contamination of the enclosure is not an ongoing issue. Still have to wash the scale, implements and bottles..."

Suitability test

Alan sought to test the potential of the glove bag concept, combined with a desiccant, to get to below the 10% (RH) target. 

  1. On the advice of Mathieu, he bought a WH8040 Digital Air Humidity Controller Sensor for $30.39 from Amazon.com which has a measuring range from 1%-99% AC 110V. It's also available for 220 v.a.c. supply on Amazon.co.uk, about £20.
  2. He then activated an 8 oz silica gel fabric bag he had, by baking it at 120 C for 150 minutes, followed by 30 minutes in a convection oven (a fruit dryer) at 50 C to remove residual water vapour.
  3. He then used a polythene bag, about 2 mil thick and 10 litre volume. He filled it with ambient air at 48% RH and then added the activated silica gel cotton bag, the RH sensor probe and closed up the bag with a wire-tie. 

Figure 1: Test setup

Results

In Alan's words "After 15 minutes the meter read 20%, and at 30 minutes it was 3.5%...

...At 45 minutes, it's "off the scale" - less than 1% with this meter. Accuracy is probably ±5% at best and no calibration was attempted. But even if its ±10%, the desiccant seems to do the job."

Conclusion

Using a $30 glove bag and some activated silica gel looks like it will really work! Additionally, if the powder did not have a problem with dry air, then there would be no need for Argon or nitrogen. A Big thank you goes to Alan for taking the initiative on this one. By testing the humidity meter with an actual glove bag and more silica gel, we could develop a protocol for Nano Powder handling that would not require the RH meter so cutting the cost of this part of the process to essentially that of the glove bag.

Discussion

We are expecting to receive 4 packages of 5g of 10nm QSI powder and this will be required to be handled in 3 locations, Minnesota (testing in advanced powder reactor), France (testing in high pressure Mizuno style cell) and California (partial sintering on Ni mesh substrate for later glow discharge testing). So this finding, especially proper use of silica gel, will be immediately helpful.

Comments   

 
0 #7 Kathie 2017-06-11 00:44
ᕼeya i am for the first timе heгe. I found this board and I
find It really useful & it hеlped me out much. I hope to give somᥱthing
back and aіd others like you helped me.
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0 #6 sims 3 profesiones 2017-01-25 21:59
You actually make it seem really easy along with your presentation however I
in finding this topic to be really one thing that
I believe I might never understand. It kind of feels
too complex and very broad for me. I'm looking ahead to your subsequent submit, I'll attempt to get the grasp of it!
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0 #5 Robert Greenyer 2014-04-30 22:03
@Ecco

It does more than that - it will forward posts across a wide array of media and social networks based on filters.

I like you ideas though. We need to make things very accessible.
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+4 #4 Mathieu Valat 2014-04-30 15:00
Ecco,
Bob is right, there are very interesting things going on.
We are just preparing internally to make sure that scientific rigor is fulfilled and that equality on access to information is respected. You just showed us it is not, so thank you.

This might be the biggest step in our project yet, and we are very happy to be on the verge of this achievement.

Your suggestions are very clever and that is out of my current ability to implement. I am sure this is doable though.
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+1 #3 Ecco 2014-04-30 12:51
@Robert Greenyer: why spend money and complicating things up when there's a free, much easier and simpler solution than that?

Just have a dedicated, single general blog post or forum thread (so that it will be put to better use, among other things) for every new experiment / campaign. Put most general information (Evernote notebook links, documents, etc) in the first thread post / blog post and keep posting log updates on Evernote. From time to time, check out comments and engage in discussions, post live updates and share tidbits there. Keep the first post / blog post containing general experiment information updated as needed.

Make these dedicated forum threads / blog posts for ongoing experiments prominently visible somewhere on the website, so that they will be easily accessible and discoverable.

Updates not strictly related with incremental, day-to-day progress in ongoing experiments, or "breaking news"/important events related to them could have their own entry in the main quantumheat.org news blog section, which could be repurposed to also feature important general LENR-related news not necessarily related (or directly so, at least) with MFMP.

I believe these improvements would make and website and organization appear more alive and accessible.
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+1 #2 Robert Greenyer 2014-04-30 10:18
@Ecco

Agreed. Following a trip to Coalescence, HUG decided to use Evernote as it is very easy to capture things in the moment as they were doing and reduces the chance to miss key information. Alan has also taken this path. In part that is because it is not so easy to upload and make blogs on Joomla - the CMS on which this site is built.

I tried to address this immediately when it started by testing zapier... zapier will link Evernote to several things but not joomla as you can see here.

https://zapier.com/zapbook/evernote/joomla/

I guess it could be linked to other avenues like FB or Twitter but the service costs money and we are just not receiving any donations at the moment other than physical items and time. My plan was to link to a google doc and then embed that google doc into a thread - but I have been engaged in grant applications for the project because we have a huge roster of experiments to do (5 now, none successful) and keeping my own head above water.

This is the function I intended to do - create a new row in a live published Google spreadsheet and have the spreadsheet hosted on this site.

https://zapier.com/zapbook/evernote/google-docs/422/create-google-spreadsheet-row-evernote-note/

I think we can get away with a basic package which is $165 per year. If I can get agreement, I will go ahead with that - then the logbook could be automatically generated this way also.

There really is a HUGE amount going on, I will work with the team to get it all published here. Something we are negotiating on at the moment will have profound changes Thank you for your continued attention.
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+4 #1 Ecco 2014-04-29 10:55
@MFMP: maybe unrelated with this blog, but I hope you realize that the lack of updates on the public side of quantumheat.org is making the organization appear somewhat dormant. In reality, as I recently found out, it appears there has been quite some activity recently, judging by the logs on Evernote. Even I was surprised with that, since I only followed the "hydrogen splitting" one and the last entry is two weeks old.

I think very few people regularly check the Evernote logs. Accessibility is poor (one has to hunt for the notebook links, and I wonder if there actually is more than what I have joined) and there is little to no indication anywhere on the website that you're posting day-to-day updates there. It's also not straightforward to get update notifications as with other web resources. All of this discourages community discussions and involvement, already hampered by the seemingly lack of progress in conclusively demonstrating excess heat.
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