Development of Nano-functional Materials Derived from Metal and/or'Ceramics Glasses as Precursors

本研究以金属和/或陶瓷玻璃为原料合成了纳米材料，并对其功能特性进行了表征。2003-2005年的研究结果如下：1)金属氧化物纳米复合材料的制备及其微波吸收性能研究金属氧化物纳米复合材料是由稀土-铁二元或稀土-铁-硼三元体系中淬火的非晶合金经加氢歧化和氧化得到的。所得α-Fe/RE_O_3或α-Fe/Fe_2B/RE_O_3 （RE=稀土）在1.5 ~ 18 GHz范围内具有良好的电磁波吸收性能。这是由于α-Fe或Fe_2B磁性颗粒通过形成纳米复合颗粒有效降低了趋肤效应。2)含固体电解质成分陶瓷玻璃的制备及其离子导电性能采用电炉加热或Nd:YAG激光辐照制备了含（La, Sr）（Ga, Mg）O_<3-δ>或（Ce, Sm）O_<2-δ>等固体电解质成分的氧化玻璃。所制得的陶瓷玻璃具有良好的O^2离子导电特性，并在玻璃表面形成了精细的离子传导路径。这些结果表明它们有可能用作传感探头等。3)制备及持续光谱烧孔性能采用熔融法制备了CaX_2-SiO_2-Al_O_3 （X=F, Cl）三元体系中的氧卤化物玻璃，温度约为1200℃，分别在空气或H_2/N_2混合气体中制备。所制得的氧卤化物玻璃具有优异的持续光谱空穴燃烧（PSHB）性能和较高的空穴峰形成率。特别是在室温下，cacl_2基玻璃的空穴峰仍然存在。

The present study was made to synthesize the nano-materials derived from metal and/or ceramic glasses and characterize their functional properties. The obtained results for the period of 2003-2005 are as follows :1)Preparation and microwave absorbing properties of metal-oxide nano-compositesThe metal-oxide nano-composites were derived from the quenched amorphous alloys in rare earth-iron binary or rare earth-iron-boron ternary systems by the subsequent HD (hydrogenation disproportionation) and oxidation processes. The resultant α-Fe/RE_O_3 or α-Fe/Fe_2B/RE_O_3 (RE=rare earths) showed good electromagnetic wave absorbing properties in a range of 1.5-18 GHz. This is due that the skin effect of α-Fe or Fe_2B magnetic particles is effectively lowered by forming such nano-composite particles.2)Preparation and ionic conducting properties of ceramic glasses containing some components for solid electrolytesThe oxide glasses containing solid electrolyte components such as (La, Sr)(Ga, Mg)O_<3-δ>or (Ce, Sm)O_<2-δ> were prepared and crystallized by the subsequent heating with an electric furnace or irradiating with a Nd:YAG laser. The resultant ceramic glasses showed good O^2-ion conducting characteristics and the fine ion conduction path was finely patterned on the surface of glasses. These results indicate they are possibly used as sensing probe and so on.3)Preparation and persistent spectral hole-burning propertiesThe oxy-halide glasses in ternary systems of CaX_2-SiO_2-Al_O_3 (X=F, Cl) were prepared by the molten method in air or H_2/N_2 mixed gas at ca. 1200℃. The resultant oxy-halide glasses showed excellent persistent spectral hole-burning (PSHB) properties with a high hole peak formation rate. Particularly, the hole peaks of CaCl_2-based glasses were persisted even at room temperature.