{"title":"熔体透明度对利用佐赫拉尔斯基技术生长 Li2MoO4 单晶的影响","authors":"Yahia Zakarya Bouzouaoui, Rayane Ayadi, Oumaima Brakni, Samir Zermout, Idir Lasloudji, Matias Velázquez","doi":"10.1002/crat.202400095","DOIUrl":null,"url":null,"abstract":"<p>In this paper, it is found that taking a semitransparent melt, influences c–m interface shape, heat transfer, melt flow and von Mises thermal stress distributions, therefore the quality of the grown crystal. As a result, when absorption coefficients of both melt and crystal change from transparent to opaque case, the c–m interface convexity reduces from 12.5 to 5.8 mm, its shape becomes more convex toward the melt, and the maximum von Mises thermal stresses decreases from 69.55 to 13.8 MPa. For the second study, where the crystal absorption coefficient is fixed at <span></span><math>\n <semantics>\n <mrow>\n <mn>20</mn>\n <mspace></mspace>\n <msup>\n <mi>m</mi>\n <mrow>\n <mo>−</mo>\n <mn>1</mn>\n </mrow>\n </msup>\n </mrow>\n <annotation>$20\\ {{\\mathrm{m}}}^{ - 1}$</annotation>\n </semantics></math>, the c–m interface convexity increases with the increase in melt absorption coefficient. The maximum and minimum von Mises stresses for the case <span></span><math>\n <semantics>\n <mrow>\n <mn>100</mn>\n <mspace></mspace>\n <msup>\n <mi>m</mi>\n <mrow>\n <mo>−</mo>\n <mn>1</mn>\n </mrow>\n </msup>\n </mrow>\n <annotation>$100\\ {{\\mathrm{m}}}^{ - 1}$</annotation>\n </semantics></math> are low compared to other values; then the grown crystal has a good quality.</p>","PeriodicalId":48935,"journal":{"name":"Crystal Research and Technology","volume":null,"pages":null},"PeriodicalIF":1.5000,"publicationDate":"2024-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"The Impact of Melt Transparency on Li2MoO4 Single Crystal Growth by the Czochralski Technique\",\"authors\":\"Yahia Zakarya Bouzouaoui, Rayane Ayadi, Oumaima Brakni, Samir Zermout, Idir Lasloudji, Matias Velázquez\",\"doi\":\"10.1002/crat.202400095\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p>In this paper, it is found that taking a semitransparent melt, influences c–m interface shape, heat transfer, melt flow and von Mises thermal stress distributions, therefore the quality of the grown crystal. As a result, when absorption coefficients of both melt and crystal change from transparent to opaque case, the c–m interface convexity reduces from 12.5 to 5.8 mm, its shape becomes more convex toward the melt, and the maximum von Mises thermal stresses decreases from 69.55 to 13.8 MPa. For the second study, where the crystal absorption coefficient is fixed at <span></span><math>\\n <semantics>\\n <mrow>\\n <mn>20</mn>\\n <mspace></mspace>\\n <msup>\\n <mi>m</mi>\\n <mrow>\\n <mo>−</mo>\\n <mn>1</mn>\\n </mrow>\\n </msup>\\n </mrow>\\n <annotation>$20\\\\ {{\\\\mathrm{m}}}^{ - 1}$</annotation>\\n </semantics></math>, the c–m interface convexity increases with the increase in melt absorption coefficient. The maximum and minimum von Mises stresses for the case <span></span><math>\\n <semantics>\\n <mrow>\\n <mn>100</mn>\\n <mspace></mspace>\\n <msup>\\n <mi>m</mi>\\n <mrow>\\n <mo>−</mo>\\n <mn>1</mn>\\n </mrow>\\n </msup>\\n </mrow>\\n <annotation>$100\\\\ {{\\\\mathrm{m}}}^{ - 1}$</annotation>\\n </semantics></math> are low compared to other values; then the grown crystal has a good quality.</p>\",\"PeriodicalId\":48935,\"journal\":{\"name\":\"Crystal Research and Technology\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":1.5000,\"publicationDate\":\"2024-09-10\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Crystal Research and Technology\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://onlinelibrary.wiley.com/doi/10.1002/crat.202400095\",\"RegionNum\":4,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"Chemistry\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Crystal Research and Technology","FirstCategoryId":"88","ListUrlMain":"https://onlinelibrary.wiley.com/doi/10.1002/crat.202400095","RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"Chemistry","Score":null,"Total":0}
引用次数: 0
摘要
本文发现,半透明熔体会影响 c-m 接口形状、传热、熔体流动和 von Mises 热应力分布,从而影响生长晶体的质量。因此,当熔体和晶体的吸收系数从透明变为不透明时,c-m 接口的凸度从 12.5 mm 减小到 5.8 mm,其形状变得更加凸向熔体,最大 von Mises 热应力从 69.55 MPa 减小到 13.8 MPa。在第二项研究中,晶体吸收系数固定为 ,c-m 接口凸度随着熔体吸收系数的增加而增加。与其他值相比,该情况下的最大和最小 von Mises 应力都较低,因此生长出的晶体质量较好。
The Impact of Melt Transparency on Li2MoO4 Single Crystal Growth by the Czochralski Technique
In this paper, it is found that taking a semitransparent melt, influences c–m interface shape, heat transfer, melt flow and von Mises thermal stress distributions, therefore the quality of the grown crystal. As a result, when absorption coefficients of both melt and crystal change from transparent to opaque case, the c–m interface convexity reduces from 12.5 to 5.8 mm, its shape becomes more convex toward the melt, and the maximum von Mises thermal stresses decreases from 69.55 to 13.8 MPa. For the second study, where the crystal absorption coefficient is fixed at , the c–m interface convexity increases with the increase in melt absorption coefficient. The maximum and minimum von Mises stresses for the case are low compared to other values; then the grown crystal has a good quality.
期刊介绍:
The journal Crystal Research and Technology is a pure online Journal (since 2012).
Crystal Research and Technology is an international journal examining all aspects of research within experimental, industrial, and theoretical crystallography. The journal covers the relevant aspects of
-crystal growth techniques and phenomena (including bulk growth, thin films)
-modern crystalline materials (e.g. smart materials, nanocrystals, quasicrystals, liquid crystals)
-industrial crystallisation
-application of crystals in materials science, electronics, data storage, and optics
-experimental, simulation and theoretical studies of the structural properties of crystals
-crystallographic computing