泗滨砭石的岩石矿物研究Ⅱ:矿物组成特征与红外发射功能的关系

为进一步查明泗滨砭石的矿物组成特征与砭石良好的红外发射功能间的关系,用激光喇曼光谱和高分辨透射电镜对砭石样品进行了研究.喇曼光谱研究除证实样品含有微米晶黄铁矿、石墨和锐钛矿外,还发现方解石、黄铁矿和锐钛矿的谱图上均有石墨的两个谱峰.TEM和HRTEM观察发现方解石全由纳米品组成,并普遍有石墨纳米粒子产出.纳米晶石墨多分布于方解石晶界间.4种矿物中纳米晶方解石含量最高,热容也最大,是泗滨砭石具有良好热辐射性质最重要的矿物学背景条件.纳米晶石墨的普遍存在提高了岩石整体导热和储热性能,其优良的热红外发射性能也是造成泗滨砭石在远红外波段具有很高发射率的一个重要原因.黄铁矿具有良好的热电性,而锐钛矿的红外线吸收和反射能力都较强、光电转换效率也高,它们也是泗滨砭石具有良好的热发射性能的一个辅助原因.上述4种矿物良好物理性质的共同作用,使加热后的泗滨砭石具有疏通经络、活血化淤、调理气血等重要的理疗功效,中医砭术在医疗保健上所利用的也正是砭石能辐射对人体有益的远红外线功能.

Petrological and Mineralogical Study of The Sibin Bian-Stone II:Relations Between Its Mineral Constituent Features and IR Emission Ability

In order to investigate the relations between mineral-constituent features and IR emission ability of the Sibin Bian-stone,a detailed study of the Sibin Bian-stone samples has been conducted by using the Raman spectroscopy and high-resolution transmission electron microscopy. The Raman spectroscopic study has not only confirmed the existence of fine-grained pyrite,anatase and graphite,but also revealed that two broad peaks of graphite are al- ways presented in the spectra of calcite,pyrite and anatase respectively. The TEM and HRTEM studies show that the calcite grains of the Sibin Bian-stone is composed of numerous nanometer-sized crystals, with nanometer-sized graphite commonly in the interstices of calcite grains. The highest content and the largest thermal capacity of nanometer-sized calcite crystals are the most important mineralogical background for the good thermal radiation property of the Sibin Bian-stone. The common presence of nanometer-sized graphite in the Sibin Bian-stone not only enhanced the thermal conductivity and heat-storing capability of the Bian-stone, but also resulted in the high infrared emission rate because of its good infrared emission capability. The good pyroelectrieity of pyrite, the good infrared absorption and reflection capability and high photoelectricity transformation rate of anatase subordinately enhanced the infrared emission capability of the Sibin Bian-stone. It is believed that the combination of good thermal properties of the above 4 minerals make the Sibin Bian-stone as an useful material with very good physiotherapical functions. Hence, the Sibin Bian-stone have widely been used to make acupression and acupuncture tools for stimulating the circulation of the blood in vessels and relaxing muscles and joints of human beings by utilizing its infrared thermal radiation property.