a三级黄色片,久久亚洲精品国产一区,天天天操操操,日韩啪啪小视频,免费观看黄视频,久久久久国产成人免费精品免费,特级一级片

Crystals found in unearthed glazed porcelain

Source: Xinhua| 2018-08-14 19:29:01|Editor: Yurou
Video PlayerClose

BEIJING, Aug. 14 (Xinhua) -- A large number of crystals with high purity have been found in purple-gold glazed porcelain excavated at the Palace Museum, also known as the Forbidden City, in Beijing.

The crystals are dispersed across the glazed surface to a depth of approximately tens of micrometers.

They measured one to three micrometers in length and less than one micrometer in width, with a thickness of approximately 150 nanometers, according to Lei Yong, an official at the Palace Museum.

The formation of the crystals contributed to the reddish-brown tones of the purple-gold glaze.

It is believed the porcelain dates back to the 18th century.

Research into the porcelain and the crystals was jointly conducted by the Palace Museum and Shanghai Synchrotron Radiation Facility.

Previously, crystals were found in porcelain glaze from the Song Dynasty (960-1276), however, not as evenly distributed and sized as the newly found items.

There are still difficulties in producing crystals with such high purity and large size.

The findings of the research could be useful in the production of magnetic materials.

TOP STORIES
EDITOR’S CHOICE
MOST VIEWED
EXPLORE XINHUANET
010020070750000000000000011100001373898221