摘要
采用熔融淬冷法制备了不同锂钠比的锂铝硅酸盐玻璃,用两步化学强化法对样品进行了化学强化处理,研究了Li_(2)O取代Na_(2)O对铝硅酸盐玻璃机械性能和化学强化特征参数的影响。结果表明:随着Li_(2)O逐渐取代Na_(2)O,玻璃化转变温度从537.3℃减小至514.8℃。随着Li_(2)O含量增加,有利于化学强化中的第一步交换———Li^(+)-Na^(+)交换,提高交换层深度,但会对第二步Na^(+)-K^(+)交换产生抑制作用,导致K^(+)的交换深度减小。维氏压痕测试表明化学强化可以明显地提高Na-Li-x玻璃的硬度和抗裂性。随着Li_(2)O取代Na_(2)O,化学强化后玻璃的抗裂性先增后减,在Li_(2)O摩尔分数为10%时达到极值,为72.3 N,相比Li_(2)O摩尔分数为5%时的值提升了69.3%,引入适量的Li_(2)O会提高玻璃的耐径向开裂能力。
By using the melting-quenching technique,lithium aluminosilicate glasses with various Li_(2)O/Na_(2)O ratios were prepared.A two-step chemical strengthening approach was employed to improve the performance of glass.After chemical strengthening,mechanical properties and characteristic parameters were investigated.It is found that the glass transition temperature decreases from 537.3℃to 514.8℃as Li_(2)O gradually replaces Na_(2)O.With the increase of Li_(2)O content,it is beneficial to Li^(+)-Na^(+)ion exchange,increasing the depth of compression(DOC).But it will inhibit the Na^(+)-K^(+)ion exchange,resulting in the decrease of depth of layer(DOL).The hardness and crack resistance of glasses are greatly improved after twostep ion-exchange.The crack resistance(CR)of the samples first increases and then decreases with the increase of Li_(2)O/Na_(2)O ratio.It reaches the maximum value of 72.3 N when the concentration of Li_(2)O is 10 mol%.Compared to the sample with a Li_(2)O concentration of 5 mol%,it increases by 69.3%,indicating that the introduction of an appropriate amount of Li_(2)O will improve the radial crack resistance of the glass.
作者
何进
王明忠
陈志鸿
崔秀珍
许银生
陆平
HE Jin;WANG Mingzhong;CHEN Zhihong;CUI Xiuzhen;XU Yinsheng;LU Ping(Xianning CSG Photovoltaic Glass Co.,Ltd.,Xianning 437100,China;State Key Laboratory of Silicate Materials for Architecture,Wuhan University of Technology,Wuhan 430070,China)
出处
《材料科学与工程学报》
CAS
CSCD
北大核心
2023年第2期176-181,共6页
Journal of Materials Science and Engineering
基金
国家自然科学基金资助项目(61975156)
咸宁南玻光电玻璃有限公司资助项目(XNGDJS202007001)。
关键词
化学强化
盖板玻璃
离子交换
铝硅酸盐玻璃
应力层深度
Chemical strengthening
Cover glass
Ion exchange
Aluminosilicate glass
Depth of compression
