ImageVerifierCode 换一换
格式:PPT , 页数:23 ,大小:5MB ,
文档编号:4988660      下载积分:22 文币
快捷下载
登录下载
邮箱/手机:
温馨提示:
系统将以此处填写的邮箱或者手机号生成账号和密码,方便再次下载。 如填写123,账号和密码都是123。
支付方式: 支付宝    微信支付   
验证码:   换一换

优惠套餐
 

温馨提示:若手机下载失败,请复制以下地址【https://www.163wenku.com/d-4988660.html】到电脑浏览器->登陆(账号密码均为手机号或邮箱;不要扫码登陆)->重新下载(不再收费)。

已注册用户请登录:
账号:
密码:
验证码:   换一换
  忘记密码?
三方登录: 微信登录  
下载须知

1: 试题类文档的标题没说有答案,则无答案;主观题也可能无答案。PPT的音视频可能无法播放。 请谨慎下单,一旦售出,概不退换。
2: 本站所有资源如无特殊说明,都需要本地电脑安装OFFICE2007和PDF阅读器。
3: 本文为用户(晟晟文业)主动上传,所有收益归该用户。163文库仅提供信息存储空间,仅对用户上传内容的表现方式做保护处理,对上载内容本身不做任何修改或编辑。 若此文所含内容侵犯了您的版权或隐私,请立即通知163文库(点击联系客服),我们立即给予删除!。
4. 未经权益所有人同意不得将文件中的内容挪作商业或盈利用途。
5. 本站仅提供交流平台,并不能对任何下载内容负责。
6. 下载文件中如有侵权或不适当内容,请与我们联系,我们立即纠正。
7. 本站不保证下载资源的准确性、安全性和完整性, 同时也不承担用户因使用这些下载资源对自己和他人造成任何形式的伤害或损失。

版权提示 | 免责声明

1,本文(MCVD工艺制备光纤制造工艺课件.ppt)为本站会员(晟晟文业)主动上传,163文库仅提供信息存储空间,仅对用户上传内容的表现方式做保护处理,对上载内容本身不做任何修改或编辑。
2,用户下载本文档,所消耗的文币(积分)将全额增加到上传者的账号。
3, 若此文所含内容侵犯了您的版权或隐私,请立即通知163文库(发送邮件至3464097650@qq.com或直接QQ联系客服),我们立即给予删除!

MCVD工艺制备光纤制造工艺课件.ppt

1、新型光纤材料与器件团队NOVEL OPTIC FIBERS AND DEVICES TEAMMCVD工艺关键技术光纤的四大制造技术?VAD(轴向汽相沉积)?OVD(外部汽相沉积)?MCVD(改进的化学汽相沉积)?PCVD(等离子体化学汽相沉积)MCVD工艺简介工艺简介MCVD工艺步骤1Recipe DevelopmentMain variables for each process steps are following:?Gas flows:bubbler carrier gas,O2,He,Cl2,SF6 etc.?Preform temperature?Carriage speed?So

2、otbox pressure?Ramping of relevant parametersMCVD工艺步骤工艺步骤2Tube preparationTypical MCVD production tube is constructed from three quartz tubes,which are welded together prior to MCVD process.?inlet tube:low quality quartz?substrate tube:high quality synthetic silica,forms final preform?exhaust tube:l

3、ow quality quartz?sleeving tube:synthetic silicaMCVD工艺步骤工艺步骤3Fire Polishing/EtchingPurpose:To clean tube outer and inner surface to improve preform quality.?Temperature:1850-2200C?Reactant flows:O2+fluorine source for etchingSF6+O2MCVD工艺步骤工艺步骤4Cladding and core depositionCladding deposition?Purpose:

4、deposition of protection barrier for core.?Temperature:1900-2100oC?Typical reactant flows:SiCl4,?POCl3,O2,HeCore deposition?Purpose:deposition of refractive?index difference?Temperature:1900-2200oC?Typical reactant flows:SiCl4,?GeCl4,O2,HeMCVD工艺反应机理工艺反应机理SiCl4+O2=SiO2+2Cl2 GeCl4+O2=GeO2+2Cl24POCl3+3

5、O2=2P2O5+6Cl2 4BCl3+3O2=2B2O3+6Cl2热泳效应热泳现象热泳现象是指在温度梯度不为零的气体或悬浮体中,粒子向较冷区域运动的现象。热泳速度正比于温度梯度,而与粒径无关。MCVD工艺步骤工艺步骤5Collapsing?Purpose:to produce glass rod for jacketing and fiber drawing?Typically 2 to 5 forward and 1 backward steps?Temperature:2000-2400oC?Chlorine used as a drying agentMCVD工艺步骤工艺步骤5 Pre

6、form analysis?dimensional and optical parameter evaluation.?important process and quality control toolMore preform analysis?Preform dimensionsPreform,cladding and corediameters from different anglesand longitudinal positions?Refractive indicesSubstrate tube,cladding and corefrom different longitudin

7、al positions?Cutoff,MFD,Chromatic dispersion?Preform non-circularity(preform,cladding,core)?Preform concentricity(preform,cladding,core)MCVD工艺步骤6 Rod in tube sleeving?Purpose:enlarge preform size to improve MCVD productivity?Typical final preform size:40 to 80 mm?Temperature:2000C?Vacuum suction bet

8、ween rod and tube to accelerate joining processFiber drawingMCVD设备系统主要组成设备系统主要组成1.Lathe 2.Gas Control System 3.PC/PLC Control System 4.Gas&Water Supply5.Extract Systems.SGC MCVD MCVD Lathe?Oxy-hydrogen burner?Pyrometer?Flame detectorGas Control and supply System?Silicon Tetrachloride(SiCl4)Supply?Ge

9、rmanium Tetrachloride(GeCl4)Supply?Phosphoryl Chloride(POCl3)Supply?Boron trichloride(BCl3)Supply?Lathe Hydrogen&Oxygen Supply?Sulphur Hexafluoride(SF6)Supply?Chlorine Supply?Oxygen Supply?Helium Supply?Nitrogen Supply?Pneumatics Supply?Drybox temperature controlGas StationExtract Systems1.Gas inlet

10、2.Jet stream column3.Reduction tank4.Neutralization tank5.Absorption column6.Fresh water feed7.Chemical feed8.Waste water discharge9.Pure gas outletGas scrubberJet stream tankOver 90%of silica is collected to the350l jet stream tank.NaOH and Na2S2O3 solutions areautomatically added to the tank tokee

11、p the pH in the tank between 8 and8.5 and Redox potential between-50and+200mV.The washed gas is directed to Neutralization tankthrough a mist eliminator.Jet stream tank receives continuous15-40 l/h overflow from Neutralization tank.Gas scrubber Neutralization tank?The washed gas from stage 1 is?directed to the stage 2 through a setof dampers and mist eliminator(chevron type).?pH of stage 2 tank is kept between10 and 11 to ensure efficient?neutralization of the HCl gas.?HCl+NaOH-NaCl+H2O?Cl2+2NaOH-NaCl+NaClO+H2O新型光纤材料与器件团队NOVEL OPTIC FIBERS AND DEVICES TEAM谢谢!谢谢!

侵权处理QQ:3464097650--上传资料QQ:3464097650

【声明】本站为“文档C2C交易模式”,即用户上传的文档直接卖给(下载)用户,本站只是网络空间服务平台,本站所有原创文档下载所得归上传人所有,如您发现上传作品侵犯了您的版权,请立刻联系我们并提供证据,我们将在3个工作日内予以改正。


163文库-Www.163Wenku.Com |网站地图|