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1、文獻檢索的作業(yè)實習：專利文獻檢索實習目的：了解專利文獻檢索的方法實習要求：能用多種途徑進行專利文獻檢索實習設備：計算機實習內容：1、氮化鋁粉末的生產工藝（國外專題數據庫）（1）、Rareearth-activatedaluminumnitridepowdersandmethodofmakingInventorsBINGHANUSJONATHANTAPUSMADISRAUKASUSApplicantsOSRAMSYLVANIAINCUSPriorityUS763689P??31-Jan-2006ClassificationsInternational(2006.01):C0
2、4B35/00European:C04B35/581;C01B21/072;C09K11/08J;C09K11/77D;C09K11/77N6;C09K11/77P6;C09K11/77T6AbstractRareearth-activatedaluminumnitridepowdersaremadeusingasolution-basedapproachtoformamixedhydroxideofaluminumandarareearthmetal,themixedhydroxideisthenconvertedintoanammoniummetalfluoride,
3、preferablyarareearth-substitutedammoniumaluminumhexafluoride((NH4)3Al1-xRExF6),andfinallytherareearth-activatedaluminumnitrideisformedbyammonolysisoftheammoniummetalfluorideatahightemperature.Theuseofafluorideprecursorinthisprocessavoidssourcesofoxygenduringthefinalammonolysisstepwhichisa
4、majorsourceofdefectsinthepowdersynthesisofnitrides.Also,becausethealuminumnitrideisformedfromamixedhydroxideco-precipitate,thedistributionofthedopantsinthepowderissubstantiallyhomogeneousineachparticle.（2）、ALUMINUMNITRIDESINTEREDBODYANDMETHODOFPRODUCINGTHESAME9公開號US5482905申請?zhí)朥S/08/178642申
5、請人SUMITOMOELECTRICINDUSTRESLTDSUMITOMOELECTRICINDUSTRIESLTD發(fā)明人NAKAAHATASEIJIAMATSUURATAKAHIROSOGABEKOUICHIYAMAKAWAAKIRAHATASEIJIMATSUURATAKAHIROSOGABEKOUICHIYAMAKAWAAKIRA申請日期1994-01-05授權日期1996-01-09國際分類C04B35/58C04B35/58??美國專利分類501/98.4501/98.4??代理人Bierman;JordanB.BiermanandMuserlianman;J
6、ordanB.BiermanandMuserlian摘要AnaluminumnitridesinteredbodycomprisingaluminumnitridecrystalsbelongingtoaWurtzitehexagonalcrystalsystemwhereinthe3axesa,bandcoftheunitlatticeofthecrystalaredefinedsuchthattheratiob/aofthelengthsoftheaxesbandais1.000nearthecenterofthecrystalgrainandlieswithinth
7、erange0.997-1.003inthevicinityofthegrainboundaryphase.Aluminumnitridesinteredbodyisproducedbysinteringamoldedbodyofarawmaterialpowderhavingaluminumandnitrogenasitsprincipalcomponentsatatemperatureof1700.degree.-1900.degree.C.inanon-oxidizingatmospherehavingapartialp
