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

以金属和/或陶瓷玻璃为前体衍生的纳米功能材料的开发

基本信息

批准号：
15205025
负责人：
MACHIDA Ken-ichi
金额：
$ 30.12万
依托单位：
Osaka University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (A)
财政年份：
2003
资助国家：
日本
起止时间：
2003 至 2005
项目状态：
已结题

项目摘要

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.

本研究旨在合成金属和/或陶瓷玻璃衍生的纳米材料并表征其功能特性。1）金属氧化物纳米复合材料的制备及其吸波性能研究金属氧化物纳米复合材料是以稀土-铁二元或稀土-铁-硼三元非晶合金为原料，通过氢化还原和氧化反应制备的。在1.5 ~ 18 GHz范围内，α-Fe/REO_3或α-Fe/Fe_2B/REO_3（RE=稀土）具有良好的吸波性能。这是由于这种纳米复合粒子的形成有效地降低了α-Fe或Fe_2B磁性粒子的集肤效应。2）含某些固体电解质组分的陶瓷玻璃的制备及其离子导电性能研究了含（La，Sr）（Ga，Mg）O_（3-δ）或（Ce，Sm）O_（2-δ）的制备和晶化。该陶瓷玻璃具有良好的O^2-离子传导特性，玻璃表面形成了精细的离子传导通道。3）制备及光谱烧孔性能研究采用熔融法在空气或H_2/N_2混合气体中，在约100 ℃下制备了CaX_2-SiO_2-Al_O_3（X=F，Cl）三元系卤氧玻璃。一千二百度。所得卤氧玻璃显示出优异的持续光谱烧孔（PSHB）性能与高的空穴峰形成率。特别是CaCl_2基玻璃的空穴峰在室温下也保持不变。