简介:ANINFERENCEOFTHETEMPERATUREINTHE13THCENTURYOFCHINAZhangDe’e(张德二)CenterforClimaticResearchEXTENDEDABSTRACTSincethethermaloptim...
简介:国家市场监督管理总局、国家标准化管理委员会近日批准发布涉及建材产品的国家标准13项,新发布的有9项.分别是《矿物棉制品纤维脱落测定方法》(GB/T36492-2018)、《涂料中多环芳烃的测定》(GB/T36488-2018)、《烧结砖瓦原料物理性能试验方法》(GB/T36495-2018)、《玻璃纤维短切原丝流动性的测定》(GB/36495-2018)、《玻璃纤维短切原丝流动性的测定》(GB/T36493-2018)、《混凝土制品机械砌块成型机安全要求》(GB/T36515-2018)、《玻璃纤维无捻粗纱静电性的测定》(GB/T36494-2018)、《陶粒发泡混凝土砌块》(GB/T36534-2018)、《蒸压粉煤灰空心砖和空心砌块》(GB/T36535-2018)、《水泥生产企业水平衡测试方法》(GB/T36536-2018).
简介:TheeffectsoftheintroductionofCetoLa_(1-x)Ce_xFe_(11.5)Si_(1.5)alloyson1:13phaseformationmechanism,thefirst-ordermagneticphasetransitionstrengtheningcharacteristics,andmagnetocaloricpropertywerestudied,respectively.Theresultsshowthattheformationmechanismsof1:13andLaFeSiphasesinLa_(1-x)Ce_xFe_(11.5)Si_(1.5)alloysarethesameasthoseofCe_2Fe_(17)andCeFe_2phasesinCe–Febinarysystem,respectively.ThesubstitutionofCein1:13phasewhichislimitedcanmakethefirst-ordermagneticphasetransitioncharacteristicsstrengthen,whichcanmakethermalandmagnetichysteresisincrease,thetemperatureintervaloftemperatureinducedphasetransitiondecrease,andthecriticalmagneticfieldoffield-inducedmagneticphasetransition(HC)increase,respectively.Owingtothelatticeshrinkof1:13phasewiththeincreaseinCecontent,theCurietemperatures(TC)showalineardecrease.Themaximumchangeinmagneticentropygraduallyincreasesduetothedecreaseintemperatureintervaloftemperature-inducedphasetransition,buttherelativecoolingcapacitiesareallabout80Jákg-1atmagneticfieldof2T.