Reversion - recrystauization can increase electrical conductivity . precipitation can also increase conductivity by reducing solid solubility in matrix . finauy , high - conductivity of auoys come from disperse and duplex phase structure 合金高導(dǎo)電性的根本原因在于時(shí)效后形成的彌散型復(fù)相結(jié)構(gòu),細(xì)小的析出粒子彌散分布于高電導(dǎo)率的基體之中,對(duì)電導(dǎo)率的影響很小。
And these phenomena vanished as temperature rised to 1200 . ( 6 ) the phenomenon that fe3 + ions were partly incorporated into the structure of a - al2o3 can be found in all samples . the solid solubility of fe3 + ions was decreased with the increase of temperature ( 6 )不同方法制備的復(fù)合粉末中都存在fe ~ ( 3 + )離子固溶到al _ 2o _ 3晶格中的現(xiàn)象,且固溶度隨熱處理溫度的升高而減小。
Abstract : the cold - pressing ceramic processing technique was used to prepare ce - doped barium titanate ceramics . the solid solubility of ce ions in batio3 lattice and the effect of the ce doping on the structure of batio3 dielectric ceramics were investigated by x - ray diffraction spectroscopy 文摘:采用冷壓陶瓷處理技術(shù)制備了鈰參雜的鈦酸鋇陶瓷.應(yīng)用x光衍射譜來(lái)調(diào)查鈰在鈦酸鋇晶格中的固溶性以及鈰的參雜對(duì)鈦酸鋇介電陶瓷結(jié)構(gòu)的影響
The solid reaction synthetic process , sintering properties and phase composition of the lsgm samples are investigated by tg - dta , sem , xrd and the archimedes method . the results reveal that the sintering technology generated significant influence on the sintering properties of the lsgm samples . the optimum synthesis parameters to prepare lsgm electrolyte with a pure perovskite - type structure were ascertained ; the sintering temperature and chemical constitution contributed greatly to the phase composition , the solid solubility limit of lsgm electrolyte increased with increasing of the sintering temperature , and we made lsgm electrolyte of single - perovskite structure above 1400 # 本文采用改進(jìn)埋燒法制備出la _ ( 0 . 8 ) sr _ ( 0 . 2 ) ga _ ( 1 - y ) mg _ yo _ 3 ( lsgm )電解質(zhì),對(duì)制備方法與工藝參數(shù)、材料結(jié)構(gòu)、電學(xué)性能以及熱學(xué)性能進(jìn)行了研究,分析了組成、結(jié)構(gòu)與導(dǎo)電性能的關(guān)系,探討了離子傳輸機(jī)制,其目的在于為該類離子導(dǎo)體的進(jìn)一步研究和應(yīng)用提供實(shí)驗(yàn)和理論依據(jù)。