弗仑克尔缺陷――若晶体中的空位与填隙原子的数目相等,这样的热缺陷称为弗仑克尔缺陷(Frenkel defect)。肖特基缺陷――仅由空位构成的缺陷称之为肖特基缺陷(Schottky defect)。 相关知识点: 试题来源: 解析 肖特基缺陷——仅由空位构成;弗仑克尔缺陷——空位与填隙原子数目相等。 根据题目提供的定义: 1. **弗仑...
解:肖脱基缺陷:有空位,无间隙原子,原子逃逸到晶体外表面或内界面(晶界)。 弗仑克尔缺陷:同时形成等量的空位和间隙原子,空位和间隙原子对其数量远少于肖脱基(空位)缺陷。 点缺陷对晶体性质的影响: 点缺陷存在和空位运动,造成小区域的晶格畸变。 1)使材料电阻增加定向流动的电子在点缺陷处受到非平衡力,使电子在传导中...
In Schottky defect, certain cations and anions are missing from the crystal lattice. Therefore, the density of the crystal decreases. However, in Frenkel defect, the ions do not leave the lattice but they simply change their positions from lattice points
Accordingly, the conventional rate theory is modified with account of radiation-induced Schottky defect formation at extended defects, which often acts against the mechanisms based on the Frenkel pair production in the crystal bulk. The theory is applied for the description of technologically and ...
Predict the structure of MgO crystal and the co-ordination number of the cation in which the radii of the cation and anion are 65 pm and 140 pm respectively. View Solution Statement:Schottky defect is generally shown by the compounds with high co−ordination no. ...
解:肖脱基缺陷:有空位,无间隙原子,原子逃逸到晶体外表面或内界面(晶界)。 弗仑克尔缺陷:同步形成等量旳空位和间隙原子,空位和间隙原子对其数量远少于肖脱基(空位)缺陷。 点缺陷对晶体性质旳影响: 点缺陷存在和空位运动,导致小区域旳晶格畸变。 1)使材料电阻增长定向流动旳电子在点缺陷处受到非平衡力,使电子在传导中...
(a) A Schottky defect in Li₂O involves 2 Li⁺ cation vacancies and one O²⁻ anion vacancy (b) cation Frenkel defect (a) 肖特基缺陷是阳离子空位和阴离子空位成对出现的缺陷。Li₂O为Li⁺与O²⁻的离子化合物,其化合比为2:1。为保持电中性,形成1个O²⁻空位时需要同时形成2个...
(Horace Hewitt Poole, 1886每1962), Ireland. Poole reported experimental results on the conduction in insulators and found an empirical relationship between conductivity and electrical field. Frenkel later developed a microscopic model, similar to the Schottky effect, to explain Poole's results more ...
Answer to: Explain how the electrical conductivity of a crystal is affected by the Schottky and Frenkel defect. By signing up, you'll get thousands...
Generally speaking, the Frenkel defect dominates when the radius difference between positive and negative ions is small, and Schottky defect dominates when the radius difference between the two ions is large.A.正确B.错误的答案是什么.用刷刷题APP,拍照搜索