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新型压电晶体Sr_3Ga_2Ge_4O_(14)的性能表征

Properties of New Piezoelectric Sr_3Ga_2Ge_4O_(14) Crystal
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摘要 采用坩埚下降法以及坩埚密封技术,成功生长了直径50mm的新型压电晶体Sr3Ga2Ge4O14.测试了晶体的晶格常数、热膨胀系数、密度、硬度和透过光谱等基本物理性能.测试结果表明:晶体热膨胀系数明显小于石英晶体,而且α11和α33相对比较接近,有利于该晶体用作声表面波用基片材料.在250～2500nm波段范围内,其透过率均大于80%,优于相同结构的La3Ga5SiO14晶体,是一种潜在的激光基质晶体材料. A new piezoelectric single crystal Sr3Ga2Ge4O14 (SGG) has been successfully grown by the vertical Bridgman method with crucible-sealing technique. SGG crystal up to 50 mm in diameter has been obtained. The basic physical properties of SGG crystals such as lattice parameters, thermal expansion coefficients, density, hardness and optical transmittance were measured. The thermal expansion coefficients of SGG crystal are smaller than those of α-quartz crystals, and α11 and α11 are very close, which is beneficial to SAW applications. The optical transmission of SGG crystals is above 80% in the range of 250-2500 nm, which is higher than that of La3Ga5SiO14 crystal and has a potential application as a laser host material.
作者 武安华 周娟 徐家跃
机构地区 中国科学院上海硅酸盐研究所
出处 《人工晶体学报》 EI CAS CSCD 北大核心 2005年第2期224-228,共5页 Journal of Synthetic Crystals
基金 中国科学院创新前沿项目(SCX20040016)资助
关键词 Sr3Ga2Ge4O14 压电晶体 热膨胀系数 晶体材料 晶体生长 密度 硬度 Sr_3Ga_2Ge_4O_(14) piezoelectric crystal thermal expansion coefficient optical transmition spectrum
分类号 O73 [理学—晶体学] O78 [理学—晶体学]
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参考文献13

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人工晶体学报
2005年 第2期

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