简介:采用Nb2O3、Y2O3复合稳定剂,制得了高韧性、高强度的四方相ZrO2陶瓷材料,发现在Y2O3-ZrO2材料中加入0.5~1molNb2O3,可使材料在保持原有抗弯强度的同时,一定程度上改善了断裂韧性和相组成。
简介:ThisworkstudiedthecharacteristicsofSiO2distributionandstructureofsilicatephasesinMgO-ZrO2compositessynthesizedbyrawmaterialsoflightfiredmagnesitendzircon,Theresultsindicatethat30wt%-40wt%SiO2contentinthesystemisexistedintheformofcrystallineofforsterite(M2S),theremainderingofSiOcontent(60wt%0-70wt%)isexistedintheglassphase,Thechemicalcompositionofglassphaseiswellagreedwiththechemicalcompositionofmonticellite(CMS).
简介:AnO'-Sialon-Al2O3compositerefractorywaspreparedbyinsitureactionofSi3N4-ZrSiO4-Al2O3mixturewithfusedaluminaaggregates.Densification,insitureactionprocedureandmicrostructureofthematerialwereinvestigatedbymeansofX-raydiffraction,opticalandscanningelectronicmicroscopesandEDAX.
简介:<正>一、市场行情简述本月行情:先仰后平走势呈现,其中年初春节市场执行订单,节后市场开盘,个别厂家均有小幅上调操作,紧随而上的是合约的价位同样有所上移,但之后面对下游整体尚无积极回暖走势,且对后市预期存有一定担忧下,加上新增产能陆续投放于市,令生产企业虽拉涨意向强烈,但难以执行调涨价格,持平保稳运行。。上游原料:–电石:走势稳中僵持,市场内供货面比较稳定,电石厂家整体开工负荷维稳;–顺酐:呈现稳后下滑走势;–甲醇:整体走势呈现先扬后抑;–丁二烯:呈现下滑走势,下游整体需求疲软;下游行情:–THF:运行稳定,其中副产市场依然作为主导,正牌货源供应有增;