Sumer (Beijing) International Trading Co., Ltd.
professional in coffin handles ,hardware and furniture handles
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Main information:
Product name:ZAMAK COFFIN HANDLE
Model: H018
Brand: B&R
Application: European style coffin
Origin: China
Manufacturer: Sumer International (Beijing) Trading Co.,Ltd
Product detail:
Size: 20*7.5 cm
Material: Zamak (Zinc alloy)
Color: Gold, Silver or Bronze (Optional)
Attached on coffin by bolt
MOQ:1000 pcs
Main feature:
Professionally engaged in funeral field over 10 years;
Customized products acceptable;
Good quality and competitive price;
More Information:
Zinc
| Atomic properties | |
| Oxidation states | -2, 0, +1, +2 (anamphoteric oxide) |
| Electronegativity | Pauling scale: 1.65 |
| Ionization energies | 1st: 906.4 kJ/mol 2nd: 1733.3 kJ/mol 3rd: 3833 kJ/mol (more) |
| Atomic radius | empirical: 134 pm |
| Covalent radius | 122±4 pm |
| Van der Waals radius | 139 pm |
| Miscellanea | |
| Crystal structure | hexagonal close-packed (hcp) |
| Speed of soundthin rod | 3850 m/s (at r.t.) (rolled) |
| Thermal expansion | 30.2 µm/(m·K) (at 25 °C) |
| Thermal conductivity | 116 W/(m·K) |
| Electrical resistivity | 59.0 nΩ·m (at 20 °C) |
| Magnetic ordering | diamagnetic |
| Magnetic susceptibility(χmol) | −11.4·10−6 cm3/mol (298 K) |
| Young's modulus | 108 GPa |
| Shear modulus | 43 GPa |
| Bulk modulus | 70 GPa |
| Poisson ratio | 0.25 |
| Mohs hardness | 2.5 |
| Brinell hardness | 327–412 MPa |
| CAS Number | 7440-66-6 |
| History | |
| Discovery | Indian metallurgists(before 1000 BCE) |
| First isolation | Andreas Sigismund Marggraf (1746) |
| Recognized as a unique metal by | Rasaratna Samuccaya(800) |
Environmental Fate of Zinc
Zinc released to the environment follows a cycle (figure 1) in which zinc from mineral ore bodies is converted through extraction and refining processes from its mineral state (mostly sphalerite ore, zinc sulfide) into the metallic state.[5] Most of this metal will have a long service in stable metal applications and will be recovered and recycled at the end of life. Metallic zinc that is exposed to the atmosphere may be subject to corrosion that will result in a slow release of small amounts of zinc into the environment.
Zinc Cycling Through Nature
By natural erosion processes, a small part of the zinc in soil, rock and sediment is constantly moved and transported through the environment. Rain, snow, ice, solar heat and wind erode zinc-containing rocks and soil. Wind and water carry minute amounts of zinc to lakes, rivers and the sea, where it collects as sediment or is transported further. Natural phenomena such as volcanic eruptions, forest fires, dust storms and sea spray also contribute to the continuous cycling of zinc through nature. It is estimated that these natural emissions of zinc amount to 5.9 million metric tonnes each year.
More Picture:
H018 antique bronze coffin handle
H018 back look