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《降溫法生長(zhǎng)KDP晶體的實(shí)驗(yàn)和數(shù)值模擬》由會(huì)員上傳分享，免費(fèi)在線閱讀，更多相關(guān)內(nèi)容在行業(yè)資料-天天文庫(kù)。
1、重慶大學(xué)碩士學(xué)位論文降溫法生長(zhǎng)KDP晶體的實(shí)驗(yàn)和數(shù)值模擬姓名：毛琨申請(qǐng)學(xué)位級(jí)別：碩士專(zhuān)業(yè)：工程熱物理指導(dǎo)教師：李明偉20070420重慶大學(xué)碩士學(xué)位論文英文摘要ABSTRACTKDPcrystal，asonekindofnon-linealopticalmaterialwimgoodqualities，hasbeenappliedwidelytothehi曲technologyfieldssuchaslaserfrequencyconversion,elcctroopticalmodulation,opticswitchandSOon．Big—sizedKDPcrystalist
2、hepreferredmaterialforICF(thermalConfinemcmtFusion)，othermaterialswithbettercomprehensiveperformancecomparedwithKDPcrystalCannotbegaineduptillnow．Becauseofitsspreadingusageinthesefields，morehigh—qualityKDPcrystalisurgentneeded．WiththedevelopmentofICFtechnology,USAprohibitstheexportofrelativet
3、echnologyandmaterials．Intheinternationalmarketsthebig—sizedandhigh-qualityKDPcrystalfallsintoshortofsupply．ThefocusoftheresearchonKDPcrystalinrecentyearsistryingtoincreaseKDPgrowthrate，shortenitsgrowthcycleanddecreaseitscostatthepreconditiontoassuringitshi曲opticalquality．Themethodoftemperatur
4、ereductionistheusualmethodofKDPcrystalgrowth．Itisveryimportantmaintainingarlappropriaterateoftemperaturereductioninorderthatthesolutionisstayinginmetastablezoneduringtheperiodofgrowth．So，intheprocessofcrystalgrowth，allappropriatesupersaturationofthesolutionneededbeconsideredpivotally．Inthispa
5、per,thefollowingresultshavebeenobtainedbyKDPcrystalgrowthexperimentsandnumericalsimulation．Theimtialtemperatureofsolutionandrateoftemperaturereductionhaveeffectsonthequantityandrateofcrystalgrowth．Solventevaporationwillaccelerategrowthbutloweritsquality．Sothevesselofgrowthsolutionshouldenable
6、closed，growthsolutionshouldbecontrolledappropriatelybytherateoftemperaturereduction．Thestabilityandpurityofthegrowingsolutionhavemorenotableinfluenceongrowthrateandquailty．ThepHvalueofthegrowingsolutionchangesthemorphologyofthegrowncrystal．pH=4．5istheappropriatevalueforKDPcrystalgrowthfromsol
7、ution．Thedistributionofcrystalsurfacesupersaturationtrendsgraduallydecreasedfromtheedgetothecenterpositionofthecrystal．Onthesalneconditions，supersaturationwillbelowerwiththegrowthrateincreasingandsupersaturationwillbeincreasedwiththerotations
