No, it is not possible to grow absolutely perfect quartz crystals, nor do
they occur naturally. I had a connection with some Corning researchers
years ago who were trying to do exactly that. They found it impossible to
control the hundreds of variables necessary to accomplish that goal.
Happily,
On 2/5/2017 4:19 PM, Peter Reilley wrote:
I am curious: is the quartz in a high quality quartz crystal perfect?
That is; is the
crystalline lattice perfect, without flaws or impurities? I assume
that the quartz is
grown in a furnace, can we grow perfect quartz crystals?
Pete.
Even a
Hi
Nothing in life is perfect :)
Diffusion of ions in the lattice is one of the more obscure sources of aging.
It is maybe
number 10 or 15 on the list. The exception to that would be high radiation
environments
where you have energetic particles trying to knock things around. A similar
(but
I am curious: is the quartz in a high quality quartz crystal perfect?
That is; is the
crystalline lattice perfect, without flaws or impurities? I assume
that the quartz is
grown in a furnace, can we grow perfect quartz crystals?
Pete.
On 2/5/2017 6:31 PM, Bob Camp wrote:
Hi
Aging
John wrote:
We know of OCXO that have been continuously running for years and have
exceptional aging, supposedly as a result.
What does it take to interrupt that? A momentary loss of power? The
oven cooling down? Some long period of off-time? Or, once the
oscillator has baked in will it
Hi
Aging can be caused by many things. Stress on the blank (and can and leads and
plating and …) is one
source. There are good reasons to believe that quartz vs metal stress can take
> 1 month to settle out
to the 90% level. Particle (think borders down to atoms) equilibrium inside the
can is
-GPSDOs/info
From: John Ackermann N8UR <j...@febo.com>
To: Discussion of precise time and frequency measurement <time-nuts@febo.com>
Sent: Sunday, February 5, 2017 2:11 PM
Subject: [time-nuts] What interrupts aging?
We know of OCXO that have been continuously running for ye
We know of OCXO that have been continuously running for years and have
exceptional aging, supposedly as a result.
What does it take to interrupt that? A momentary loss of power? The
oven cooling down? Some long period of off-time? Or, once the
oscillator has baked in will it return to that
