双有机取代基TGS系列晶体的研究

Study on Two Organic dopant TGS Series Crystals

本文采用水溶液缓慢降温法生长了 4种双有机取代基TGS系列晶体。双有机取代基分别为L α 丙氨酸 +乙酸 ,L α 丙氨酸 +丙酸 ,L α 丙氨酸 +乳酸 ,L α 丙氨酸 +异丙醇胺。系统地研究了有机双取代基TGS系列晶体的生长形态、晶胞参数、主要的介电、热释电和铁电性能参数等 ,发现这几种双有机取代基TGS晶体的品质因子有不同程度地提高。并从结构的角度出发探讨了双有机取代基对晶体生长形态和晶体性能的影响机制 ,提出了有机取代基分子本身的结构特征和有机取代基中的功能基团是影响TGS晶体形态和性能的两大因素。

Four kinds of two organic dopant TGS series crystals have been grown by slow cooling method from aqueous solution.Two organic dopants are L α alanine+acetic acid,L α alanine+propionicacid,L α alanine+lactic acid,L α alanine+iso propanol amine.The growth morphology,the lattice parameters,the main dielectric and pyroelectric and ferroelectric parameters of these crystals has been systematically studied.It is found that these two organic dopant TGS crystals have better figures of merit than that of pure TGS crystal.The mechanism of the influence of two organic dopants on morphology and properties of these crystals has been searched.