Crystal Glass Trophies
Glass is a non-inorganic material, which is an inorganic thermoplastic polymer in structure. It can be formed over 650oc. The thermal expansion coefficient of glass is lower than that of steel, which is a bad conductor of electricity and heat. Specific gravity: 2.46~2.5 linear expansion...
Glass is a non-inorganic material, which is an inorganic thermoplastic polymer in structure. It can be formed over 650oc. The thermal expansion coefficient of glass is lower than that of steel, which is a bad conductor of electricity and heat.
Specific gravity: 2.46~2.5 linear expansion coefficient: 9~10x10-6/oc(~350oc) specific heat: 0.2(0o~50oc), practical surface tensile strength: 500kgf/cm2 glass name originated from tang, that is to say, glass raw material plus lead oxide is called in crystal glass. And the proportion that adds lead oxide, with the custom definition of each country also somewhat different, generally speaking, when the proportion of lead oxide reaches 24% above, glass transmittance and refractive index are all good, at the same time heavier, softer, very suit to burn into delicate glass artwork. When talking about crystal ware in general European and American countries, it means to use this kind of crystal glass material namely, its price is expensive not general glass can be compared. Man-made glass "glass" is glass, the very glittering and translucent that added lead to change just can be called crystal. If appreciation with pure artistic vision, also have collect value of course. If you attend natural crystal natural glass energy or growth time is very different. It's important to understand. Like Austria or Italy, the crystal cup of high price glass disc wine bottle, or is the crystal glass that places adornment to use all sorts of lovely little animals, the crystal lotus glass that Buddhism USES, crystal droplight, it is crystal glass glass almost! There's no magnetic energy. Crystal glass is actually made of glass made from natural crystal, that is, lead glass is often heard. Adding lead to glass can increase the refractive index of glass and reduce hardness so that it is easy to be polished. The beautiful crystal cups that sell commonly also are lead glass.
Crystal and glass look very similar, but they are two completely different substances. The main differences are as follows:
1. Different materials
Crystals are crystals of silica, while glass is a molten mixture of silica.
2. Different effects
Glass only has adornment effect, and crystal besides adornment effect, still have piezoelectric effect, have special health care effect.
The price is different
The price of crystal is several times or even dozens of times higher than that of glass.
Different physical properties
1. Crystal is a crystal, with a high hardness (mohs 7), while glass has a low hardness (mohs 5.5). Crystal can be marked on glass, otherwise it cannot.
2. Crystal is a crystallinity with good thermal conductivity. It feels cold when touched with the tip of the tongue. The glass was warm.
Use polarizer to distinguish, crystal can pass light, but glass can't.
We can easily distinguish crystal from glass by its different physical properties.
5. Different processing techniques