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:TheeffectoftheadmixturesofAlandSimetalsandB4CandMgAlONcompoundsontheoxidationofMgO/Si3N4compositerefractoryhasbeenstudied,whichisapromisingcarbonfreerefractoryforsteel-makingapplicatlon.Thefourkindsofadmixturescanbeusedasanti-oxidantsforSi3N4,butthemixtureofAlandSiachievedthebestresult.Themixturecannotonlyplaytheroleasantioxidant,butalsoassistthesinteringprocessandhelpformdensesinteringlayer,improvingthepropertyofthecomposite.
简介:研究了影响丁苯胶乳粒径大小的主要因素,其中包括乳化剂、电解质、固含量及单体加入方式,实现了一步法合成粒径200~300nm的丁苯乳胶。以该胶乳接枝苯乙烯和甲基丙烯酸甲酯共聚单体合成甲苯丙烯酸甲酯/丁二烯/苯乙烯共聚物(MBS)树脂M-338,并研究了MBS微观形态及其改性硬PVC性能的影响因素。
简介:幸运五金塑胶有限公司于一九七八年成立,一直主力发展金属和塑胶玩具,目前的客户计有Siku、RedBox、UtilityClassic、Tootsietoy和Matlel。该公司于国内设有生产厂房,面积达二十万平方尺。