Abstract：As the saying goes that “no ash, no glaze”, lime-ash has been the core material widely used to prepare glaze in ancient China. Among all the lime-ashes, those made in Jingdezhen are the most influential and representative ones. Not only did lime-ash contribute greatly to the prosperity of porcelain making of Jingdezhen in Song, Yuan, Ming and Qing Dynasty, but also it has a complicated, rigorous and a touch of “mysterious” in its preparation process, technical principle and glaze mechanism. Therefore, the research of the lime-ash has been an important subject in exploring the “secret” of ancient Chinese porcelain production by Chinese and foreign researchers. In this paper, four representative firewood and two lime stones as the raw materials were collected for the comparative studies, and three kinds of lime-ash with different smolder times were collected from one of the only two traditional lime-ash workshops in Shou’an town nearby Jingdezhen urban area. The chemical composition and phase composition of the raw materials and lime-ash with different smolder times made in Jingdezhen were discussed by testing with the Energy Dispersive X Ray Fluorescence (EDXRF) and X-Ray Diffraction (XRD). The results showed that Fe2O3, MnO contents reaches 1.41% and 1.52% respectively, but the P2O5 content is just 0.54% of Langqi grass which is lower than other firewood that is not only benefited to form the characteristic of “Green in the white” in Jingdezhen traditional glaze, but also is favor to enhance the transparency of glaze and promote the coloration of traditional under-glazed color painted porcelain, such as the blue and white porcelain. The CaO content of grey lime stone is lower than that of the black lime stone with MgO content of 35.79%.This could be the main reason why the craftsmen prefer to use black lime stone to prepare lime-ash. In addition, the EDXRF results show that the K2O, P2O5, MnO and Fe2O3 contents have increased as the time of smoldering increases. In the meanwhile, the calcium carbonate (CaCO3) phase has also increased, but the calcium hydroxide (Ca(OH)2) phase has decreased. The study helps Jingdezhen porcelain “look like jade” and is also good to avoid the “thickness” of glaze when there is a certain amount of Ca(OH)2 in glaze. So it could be concluded that the unique raw materials and smolder technology of the lime-ash which have provided the technical support for the development of lime-ash glaze are the unique features of ancient Jingdezhen ash glaze.
吴军明，罗 婷，熊春华，虞会青，范志伟 . 釉灰制备原料和工艺对其组成的影响 [J]. 光谱学与光谱分析, 2016, 36(11): 3709-3713.
WU Jun-ming, LUO Ting, XIONG Chun-hua, YU Hui-qing, FAN Zhi-wei . Effect of Raw Materials and Preparing Process on the Composition of Lime-Ash . SPECTROSCOPY AND SPECTRAL ANALYSIS, 2016, 36(11): 3709-3713.
[1] LIU Zhen, XU Chui-xu(刘 桢, 许垂旭). Journal of Jingdezhen Ceramic Institute(景德镇陶瓷学院学报)，1986, 7(1)：35. [2] ZHOU Ren(周 仁). Symposium on Chinese Ancient Ceramics(中国古陶瓷研究论文集). Beijing: China Light Industry Press(北京：轻工业出版社), 1982. [3] Ministry of Light Industry(轻工部编). Handbook of Househood Ceramic Industry(日用陶瓷工业手册). Beijing: China Light Industry Press(北京：轻工业出版社)，1987. [4] Slade R and Wood N. ISAC’02(02’ 古陶瓷科学技术国际讨论会论文集). Shanghai: Shanghai Scientific and Technical Publishers(上海：上海科学技术出版社), 2002. 263. [5] Wood N and Cowell M. William. ISAC’02(02’ 古陶瓷科学技术国际讨论会论文集). Shanghai: Shanghai Scientific and Technical Publishers(上海：上海科学技术出版社), 2002. 326. [6] XU Chui-xu, LIU Zhen(许垂旭, 刘 桢). Jingdezhen’s Ceramics(景德镇陶瓷), 1987, (1): 19. [7] ZHU Gui-hong(祝桂洪). Traditional Technology of Jingdezhen Ceramic(景德镇陶瓷传统工艺). Nanchang: Jiangxi University Press(南昌：江西高校出版社), 2004. [8] ZHENG Nai-zhang, XIONG Chun-hua, LIU Zhao-peng(郑乃章，熊春华，柳兆鹏). Journal of Ceramics(陶瓷学报)，2010, 31(3)：440. [9] JIANG Qi(蒋 祈). TAO Ji(陶记). Codex of Jiangxi Library(江西图书馆据抄本油印), 1960. [10] ZHU Yan，TAO Shuo，XIONG Liao, et al(朱 琰，陶 说, 熊 寥，等). The Integration of Chinese Ancient Ceramic Documents(中国陶瓷古籍集成). Shanghai: Shanghai Cultural Press(上海：上海文化出版社)，2006. 326. [11] QIN Da-shu(秦大树). Archaeology(考古)，2001, (10)：78. [12] YE Jie, FAN De-lian(叶 杰, 范德廉). Bulletin of Mineralogy Petrology and Geochemistry(矿物岩石地球化学通报)，2000，19(2)：95.
