简介:TheeffectoftheadmixturesofAlandSimetalsandB4CandMgAlONcompoundsontheoxidationofMgO/Si3N4compositerefractoryhasbeenstudied,whichisapromisingcarbonfreerefractoryforsteel-makingapplicatlon.Thefourkindsofadmixturescanbeusedasanti-oxidantsforSi3N4,butthemixtureofAlandSiachievedthebestresult.Themixturecannotonlyplaytheroleasantioxidant,butalsoassistthesinteringprocessandhelpformdensesinteringlayer,improvingthepropertyofthecomposite.
简介:Carbon-containingrefiactoriesareeasilyoxidizedathightenperature,thusmakingserviceliferapidlydrop.Theanti-oxidationmethods,suchasimpregnationandaddinganti-oxidatonagents,can'tmeettherequire-mentsofindustry'sdevelopmentandsomespecialcases,Byanalyzingthecharcteristicsofseveraloxidesandnon-oxidesrawmaerials,theoxidationresistantmechanismoftherefractoryanti-oxidationcoatings(RAOC),whichpossessthecharacteristcofself-healingathighttemperature,isdiscussed.
简介:Hydrationcracksofmagnesia-spinelbricksincementindustryhavebeenseriousproblemsforbothrefractoryproducersandrefractoryusersforalongtime.Whenmagnesia-spinelbricksarekeptformorethan6months,thebrickstendtohavereactionwithwaterormoistureandresultincracksandlossontheirstructuralstrength.Thosebrickscannotbeusedanymoreandcausesubstantiallossfortherelatedparties.In2013,theSiamRefractoryIndustryCo.,Ltd.,Thailand,successfullydevelopedandappliedaspecialnano-technologytocreate'Anti-HydrationMagnesia-SpinelBricks'forcementindustrywhichcanhavethestoragetimemorethantwoyearseveninhighhumidityareas.Thecementproducerscanensurethatallbricksstillhavegoodpropertiesasthenewones.
简介:2012第九届中国(天津)国际涂料展览会时间:2012年4月10日至2012年4月12日地点:天津国际展览中心展出内容:涂料、油墨及粘合剂产品:汽车涂料、不粘涂料、工业涂料、溶剂型涂料、水基涂料、粉末涂料、建筑装饰涂料、木器家具涂料及其它相关涂料、油墨及粘合剂产品。化学品及原材料:天然树脂、合成树脂(丙烯酸树脂、氨基树脂、石油树脂、有机硅树脂等)、颜料(氧化铁红、铝粉、铝浆、钛白粉、珠光颜料、酞菁等)、溶剂、填料(高岭土、滑石粉、膨润土、碳酸钙、云母粉等)、填充剂、助剂(包括增稠剂、表面活性剂、颜料分散剂、乳化剂、交联剂、消泡剂/防泡剂、防结皮剂、流平剂、杀菌剂、催干剂、稳定剂、蜡类等)。
简介:采用工艺简单、条件温和的化学试剂脱水法制备了4,4,-双柠康酰亚胺基二苯甲烷。就影响CBMI收率的各因素:投料顺序、反应温度、反应时间、脱水催化剂体系等进行了探讨,通过实验得出了最佳操作条件。
简介:MMA经溴化加成、醚化、催化裂化制得双甲醋;单氰胺与二硫化碳在碱性条件下缩合、甲基化制备二氰醋,后与正丙胺缩合再与水合肼环合,丙三唑与苯甲醛醛缩;醛缩物在缚酸剂下与双甲醋催化闭环生成环合物。再在盐酸中水解去醛基得三唑嘧啶酮成品。分别选择car1#、cat2#为裂解和闭环催化剂,反应收率分别达91.59%,91.98%,91.1%,86.6%,69.7%,总收率46.32%,产品纯度99.53%。