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gap
Gallium phosphide (GaP), a phosphide of gallium, is a compound semiconductor material with an indirect band gap of 2.24 eV at room temperature. Impure polycrystalline material has the appearance of pale orange or grayish pieces. Undoped single crystals are orange, but strongly doped wafers appear darker due to free-carrier absorption. It is odorless and insoluble in water.
GaP has a microhardness of 9450 N/mm2, a Debye temperature of 446 K (173 °C), and a thermal expansion coefficient of 5.3 ×10−6 K−1 at room temperature. Sulfur, silicon or tellurium are used as dopants to produce n-type semiconductors. Zinc is used as a dopant for the p-type semiconductor.
Gallium phosphide has applications in optical systems. Its static dielectric constant is 11.1 at room temperature. Its refractive index varies between ~3.2 and 5.0 across the visible range, which is higher than in most other semiconducting materials. In its transparent range, its index is higher than almost any other transparent material, including gemstones such as diamond, or non-oxide lenses such as zinc sulfide.
Hello All,
Was looking for some innovative ideas from you all.😊
I’m renovating a bathroom in a flat.
The soil, hot & cold water pipe runs stops me from butting the new toilet cisten flush to the wall. I was hoping to use a flexible waste to help me get closer but the pipes stop this option. The...
Hi.
I replaced the Pressure and Temperature relief valve on my MegaFlo CL300
(I had thought it was dripping but it turns out the overflow drip is coming from the 3bar safety relief valve for the red expansion vessel)
Before I replaced the valve it would recharge the air bubble normally - the...
A family member had a sewer line collapse, which brought to light several issues with their plumbing.
There is a 1/4 gap in the sewer line where a 3 inch pipe and 90 sits on another 4 inch 90 going into the ground.
How concerned should this family member be about septic gases in the crawl space?
I have a potential issue with a toilet on a newly tiled floor and looking for some advice on acceptable tolerances and what to do.
The back of the toilet sits at about 2mm from floor and the sides vary between 2mm - 16mm. It is a closed back on toilet base and approximately 190mm to 200mm from...
Hi, I just moved into a house about a month ago and today I noticed a small gap in the tube above the boiler flue. Is this something I need to call an engineer out asap? I guess so but wanted to post just in case people have explanation of this setup.
I poked a tiny tie wrap and it goes all...
Hello there
Quick question: I have installed a new boiler today. The engineer is foing ro back tomorrow.
The boiler is in the conservatory mounted on the wall. The flue pipes exit from top of the boiler through a round hole to outside the house.
There is a big gap around the hole and...
I have a megaflo unvented cylinder on the first floor of my property and I am trying to recharge the air gap. I have turned off the incoming cold mains valve upstream (and right next to) the pressure regulating valve and then opened the hot water taps at the lowest point in the house. The...
Hi All
Noticed the floor around shower had a pool of water, looked like shower leaking from below, presumed it was trap but all good, could not see where water was coming from?
I turned on the showed head and viewed underneath base and the ONLY time i had a leak was when the water jet was...
Hi all
Thanks for the secondary return in plastic pipe replies....Nice one
Just have another question i can't find an answer to
How does the bottom of a hot water copper cylinder rot if there's no circulation of air passing through it.
I know it rots but actually why it rots is my question???
Hi all
Having a bit of a mare; some of you may recall but after having my last shower installation botched (but thankfully getting my money back after threatening to make a court claim), I've had another botch job with fitter #2! (found him on trustatrader with decent reviews but I guess...
I have encountered a problem. My shower tray was leaking and I found out it was because the tray was flexing and causing a gap at the seal. I thought this would be an easy fix and have taken the seal off. Turns out this is not the case as the gap between the seal and the tiles is about 1cm tall...
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