Posted on 09/15/2019 9:11:53 AM PDT by grundle
The temperatures are very high when a battery lights off.
LOL, I put out a silane fire on a home brew atmospheric oxide reactor by putting my thumb on the leak and continuing the process to the end. Thumb was brown for a few days until the soot came off.
Good times...
True. Neighbor loses his house, but a natural gas explosion could take out several houses.
You were depositing atmospherically reacted SiH4 (SiO2 + other stuff) on a “hot plate” with substrates in a bell jar???? or some other container?
Neighbors are far away?
Open ended rectangular quartz pipe in a fume hood. Prediluted silane, so even if dumped into air it was below LEL. Plus a hurricane of nitrogen.
Working in a 3 man wafer fab with mostly home-brew equipment was quite the learning experience.
We were in the Walter Foster Art Books warehouse, why do you ask? says nully very innocently batting his eyes...
The massive worn out blades of all those windmills will end in in landfills. A Minnesota wind farm was recently transporting these giant blades 200 miles to a landfill in South Dakota. Apparently no Minnesota landfill would accept them.
Using pyrophoric gas can entail some risks. Not familiar with prediluted SiH4. Full strength was what the fabs I worked in used.
One of my first projects at GE was to install a Silox reactor,a light powder blue box with a window to look in through and some Brooks tube flow meters to follow the bouncing balls in to “regulate” the gas mix, an open end tube with a heater block to deposit passivation glass over the final etched Aluminum conductors . The project included plumbing the stainless steel tubing with Swagelock fittings and pressure regulaters to the reactor.
https://www.chiphistory.org/187-applied-materials-silox-model-ams-2600-2660
What were the three of you making?
It was a Brooks flow meter that sprung a leak...
The world’s first CMOS on sapphire microprocessor. 3 wafers, one working die. Rockwell Anaheim had the same mask set. 12 wafers 3 die, one of which broke down the middle at dicing, one of which was destroyed in wire bonding, and one worked.
The customer wisely decided to cancel the project.
What risks?
100% silane is pyrophoric.
You said that you were using diluted silane so probably not a fire risk.
Thanks
A sparkler vs a firecracker. The sparkler burns much hotter than the firecracker. Plus, how much power is stored in a day or more in a bank of batteries. That includes powering the whole house which includes appliances, heating/cooling systems...
Also, place a firecracker on flammable material like a bed and it might char the bed. Place a sparkler on a bed and the is a very good chance that it might catch the bed on fire. Extremely hot fire vs quickly expanding gas that ends as soon as the fuel is expended. Whatever charges the batteries may continue to dump energy into the batteries even as they are melting down.
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