α—Al_2O_3三种线膨胀系数研究  

Investigation on Three Line Expansion Coefficients of α-Al_2O_3

作　　者：邵渭泉[1] 陈沙鸥[1] 戚凭[1] 李达[1] 朱海玲[1] 张永成[1] 

机构地区：[1]青岛大学理工学院物理系,山东青岛266071

出　　处：《青岛大学学报（自然科学版）》2006年第1期35-38,共4页Journal of Qingdao University(Natural Science Edition)

基　　金：青岛市自然科学基金(051JC89)

摘　　要：采用微机全自动高温热膨胀仪（RPZ03P）研究了σ-Al2O3烧结样品的热膨胀曲线，求得样品的平均线膨胀系数为（7．85±0．02）×10^-6／℃；分析了样品动态线膨胀系数与温度的关系曲线，在150-1050℃范围内，样品动态线膨胀系数随温度升高而增加，所有温度点动态线膨胀系数的平均值为样品的平均线膨胀系数；得到了样品瞬态线膨胀系数与温度关系曲线，发现随着温度升高，瞬态线膨胀系数不断减小。The thermal expansion curves of the sintered sample for α-Al2O3 were studied using Automatic High Temperature Dilatometer（RPZ-03P）, and the average line expansion coefficient was （7.85±0. 02） ×10^-6/℃. The curve of the dynamic line expansion coefficient versus the temperature displayed that the dynamic line expansion coefficient ascended with the increase of temperature, and the mean value of them equaled the average line expansion coefficient. The curve of the instantaneous line expansion coefficients related to temperature showed that these coefficients descended with the rise of temperature.

关 键 词：Α-氧化铝 平均线膨胀系数 动态线膨胀系数 瞬态线膨胀系数 

分 类 号：O552.2[理学—热学与物质分子运动论] TB303[理学—物理]