An important reason for glass transparency: a solid substance, if viewed from the inside of the atom, it is actually empty. Because inside the atom, the volume of the nucleus and electrons adds up to less than 1000,000,000 of the atomic volume. Moreover, there is no evidence that the nucleus and electrons cannot be passed by photons! Therefore, transparency is normal! To figure out this complicated problem, you must first figure out the following question: Why are some substances opaque? Opaque substances are divided into four categories: 1. Opaque due to the blocking action of free electrons: this is the reason for metal opacity. 2, opacity caused by substances that can absorb light: the electron excitation energy of molecules of such substances is relatively low, just in the visible range, and the structure of benzene ring, benzoquinone, benzidine or other conjugated system is often in the molecule. This structure can reduce the excitation energy of electrons, making electrons easily transition and absorb the energy of photons. Then the light is absorbed. 3. Opaque due to the destruction of the structure of the transparent substance. If the glass is transparent, the glass powder is opaque; the ice is transparent, and the ice is smashed and opaque. If a substance does not conform to 1, 2, then it can pass light, but if it has many small gaps in its structure, it is white. This is why white objects are opaque. 4, 1, 2, 3 reasons mixed. The opacity of many objects in reality is caused by this reason. If a substance has neither free electrons nor electrons that are easily excited, its structure is very tight and there are not many pores. That matter can pass through the photon, which is transparent. So the glass is transparent! Concerned about surprises Label: Small Encyclopedia: Why is glass transparent? Previous: What is the trend of ceiling matching? Next: Different types of wooden furniture have different health benefits
NY400 Asbestos Gasket Sheet for Oil-Resisting
Description:NY400 Asbestos Gasket Sheet for Oil-Resisting is high temperature and high pressure oil resisting materials,it can be green,black and blue colour and can cut difference size as per clients' requestmade,it made by good asbestos fiber with oil resistance synthetic rubber ,compression heating and molding it in thick paper fashion.
Usage:NY400 Asbestos Gasket Sheet for Oil-Resisting is suitable for the mediums temperature under 400℃,pressure under 4.0MPa in gasoline,mineral oil,fuel,chemical solvent oil,alkali etc transmitted in the joints of facilities and pipelines.
TEMP:400℃(max)
PRESS:4.0MPa(max)
Dimension:1540x1360mm(recommend)
4100×1500mm; 4500 x 1500mm;2000×1500mm;
1500×1500mm;1500×1000mm;1270×1300mm; 3810×1300mm
Thickness: 0.5~6.0mm
Technical data:
Lateral Tensile Strength MPa ≧15.0
Compressibility % 7~17
Recovery% ≧50
Density g/cm³ 1.6~2.0
Normal temperature softness No cracking
Oil Resistivity Test:
Immersion IRM903 Oil keeping 5h (149℃)
Lateral Tensile Strength(MPa) ≥ 12.0
Weigh gain rate(%) ≤30
Immersion ASTM Fuel Oil B keeping 5h(21-30℃)
thickening rate (%) 0~20
Oil sealing properties under normal Temperature
Medium:RH-75 Avgas
Pressure: 16Mpa No leaking keeping 30 minutes
Nitrogen Leakage Rate ML/(h•mm)≦300
Product photoes:
Ny400 Asbestos Gasket Sheet For Oil-Resisting Ny400 Asbestos Gasket Sheet For Oil-Resisting,Asbestos Gasket Sheet For Oil-Resisting,Oil-Resisting Gasket Sheet,Oil-Resistant Sealing Gasket Sheet HEBEI HENGDA SEALING MATERIALS CO.,LTD. , https://www.hengdasealing.com
