简介:Micro-poredCA6-MAlightweightmaterialwithCA6:MAmassratioof7:3waspreparedusingAl(OH)3.MgCO3andCaCO3asstartingmaterials,andanthracite.sweetpotatostarchandanthracite+sweetpotatostarchasporeformingagent(PFA)withanadditionof10mass%.20mass%and30mass%.respectively.Thestartingmaterialsweredrymixed.wetco-milledinaballmillfor1h.slipcastintocylindricalspecimenswithadiameterof60mm.andthencalcinedat1450℃for3h.WiththeincreaseofPFAaddition.apparentporosityincreases,andbulkdensitydecreases.TheinfluenceofdifferentPFAsonpropertiesofthemicro-poredLWCA6-MAaggregatewasinvestigated.TheachievedCA6-MA.byadding30%sweetpotatostarch.hasaporosityof76.8%.bulkdensityof0.78g·cm-3andmedianporesizeof1.90μm.
简介:<正>BDO6月BDO进口数量1,376吨,平均单价1,955美元/吨,进口量环比减少76.3%,主要进口台湾货源,1至6月累计进口量为24,829吨,较去年同期增长9.5%。BDO按进口国家统计(数量单位:吨,价格单位:美元/吨)进口国进口数量进口单价环比增长1至6月累计进口量1至6月累计进口量同比增长日本902,493-56.7%613-33.5%荷兰000.0%2,344-56.1%马来西亚642,270-81.0%2,819-16.2%韩国000.0%809-9.0%台湾1,2221,89917.0%13,60655.0%沙特000.0%4,
简介:Hexagonplate-likeAl8B4C7powdersweresuccessfullysynthesizedusingamixtureofdiborontrioxide,activatedcarbonandaluminumoraluminabyacarbothermalreductionprocess.TheeffectofAlsourceandstartingmaterialsadditionsonsynthesisofAl8B4C7wasinvestigated.ThephasecompositionandmicrostructureofAl8B4C7powderwerecharacterizedbymeansofXRD,SEMandEDS.ThemainphasecompositionsoftheproductssynthesizedfromAl,B2O3andactivatedcarbonareAl8B4C7andAl2OC.Al2O3canreplaceAltosynthesizeAl8B4C7.Al8B4C7grainssynthesizedfromAl2O3,B2O3andactivatedcarbonarehexagonplate-likeandhaveathicknessof10μmandasizeofabout100μm.