Studies on the Chemical Constituents in China Bronze Sculpture

The different nature of various metals in the alloy in the role varies. Copper is copper alloy bronze mirror of the basic elements, copper melting point of 1084.5 ℃, the ternary alloy in the highest melting point, about 70% of the total; if all pure copper bronze mirror, because of its high melting point, not easy for smelting, copper and bronze casting of the mirror will be red. The appearance of this bronze sculpture implied an important transition from the art of god to human. Then its value is far less than the hardness and high tin bronze, the light reflection rate is nowhere near as high tin bronze, and therefore its shine less effective. Copper in the wet air prone Pseudomonas (rust), chemical reaction in case vinegar toxic copper acetate.

Tin melting point 232 ℃, white, after adding tin alloy in tin and copper combine to form the α-phase and (α + δ) eutectoid. α phase is the Cu-Sn solid solution, the highest tin content can reach 16%; δ-phase is the intermetallic compounds, the chemical composition of Cu31Sn8, the highest tin content up to 32.6%. Tin in the alloy played a lower melting point, increase the mobility of copper solution, and make the alloy increased the hardness, but alloy can be silver; with the amount of tin added, light alloy reflectivity gradually improved. The decorations on the bronze statue of Shang and Zhou head from mystery to reality. As early as 4,000 years ago, ancestors of Qijia cast bronze mirror, in the copper solution by adding a 9% tin, which has been compared to the image effect of copper bronze mirror management. In October 1998, Chinese Academy of Sciences Natural History of the Mr.

He Tangkun for the investigation of tin content of 9% of Qijia china bronze sculpture mirror is really when the bronze mirror with, came to Ezhou museum artifacts copy of the actual study; I issue a special preparation of the 9% of the amount of tin, lead and tin 14% 2%, 2% lead, and the remaining two alloys of copper, one of the tin, 11% of total lead and 16%, respectively, with both the smelting and alloy casting experiments; because there is no mold Qijia bronze mirror, bronze mirror casting range when used for the Western Han Dynasty bronze mirror sunlight 7.4cm Fan, Fan pouring with cold, due to rain, the temperature 15 ℃, therefore, temperature range is 15 ℃. From monotony to variety, the chinese bronze has experienced a lot. Casting process smoothly, and not because of tin-containing alloys occurs less than normal water shortage.

Figure 1 shows the piece with a range of cast bronze mirror blank, you can see, casting flute angle distinct, clear writing. Figure 2 after grinding through the tin content of 9% of copper bronze mirror, you can see from the figure, the image effect is not less than modern glass, bronze mirror; From this point we should recognize that the Chinese Neolithic times, our ancestors were, it can be regarded as an epoch-making scientific and technological progress. Among the patters of human and animal on the china bronze, the man become from the passive state to the imitative position. Containing 14% tin bronze mirror image effect is even more self-evident. The disadvantage is that because of its alloys containing less tin, bronze, mirror yellow or even red-prone to be clean every day, in order to ensure the normal white. Qijia culture period from 9% tin content bronze mirror to the early Warring States period containing 24% tin bronze mirror, which has experienced between 1000 years of technical progress of the process.