台灣東部蛇紋岩製備堇青石之研究

Synthesis of Cordierite from Serpentine of Eastern Taiwan

賴方羚(F. L. Lai) ； 雷大同(D. T. Ray)

《鑛冶：中國鑛冶工程學會會刊》 57卷2期 (2013/06) Pp. 94-105

https://doi.org/10.30069/MM.201306_57(2).0010

摘要

台灣東部地區沿中央山脈東側一帶，有儲量龐大之蛇紋岩，以豐田、萬榮、瑞穗、玉里等地區之分佈最廣，總儲量達20億公噸，是國內工業礦物中位居第三位的大宗礦產品。本研究將蛇紋岩與高嶺土混合，以固態反應方式，合成堇青石，再以合成之粉末製備陶瓷體。由實驗結果得知： 蛇紋岩及高嶺土以1：4至1：2.25之摩爾比混合，在1300℃以上煆燒1 hr，可合成α-堇青石；煆燒所得堇青石粉末，在 1300℃燒結6 hr，燒結體可達98% 理論密度，熱膨脹係數在1.5-5×10^(-6)之間。

關鍵字

蛇紋岩 ； 高嶺土 ； 堇青石 ； 固態反應

並列摘要

In eastern Taiwan, along the east wing of Central Range, there is a huge serpentine resources distributed in Feng-Tien, Wan-Jung, Jui-Sui and Yu-Li areas. The estimated serpentine resource is about 2 billion tons. The serpentine is ranked third as mineral commodity produced in R.O.C. In this study, serpentine and kaolinite were mixed at appropriate proportions and were subjected to solid-state reaction to synthesize cordierite. The cordierite ceramics were prepared from the synthesized powders. Our reserach results showed that α-cordierite can be synthesized from the mixture of serpentine and kaolinite at the molar ratios from 1:4 to 1:2.25 at temperatures above 1300℃ for 1 hr. The cordierite ceramic body sintered at 1300℃ for 6 hr has a density of 98% theoretical. The thermal expansion coefficient is between 1.5-5x10^(-6).

並列關鍵字

serpentine ； kaolinite ； cordierite ； solid-state reaction