1、GB/T16661-2018表1Ce:(CO3)3e(C0,)Ce:(CO)Ce:(CO3)3Ce:(CO3)3产品字符牌号。nH2O-4N5nHO-4N。nHz0-3N5。nHzO-3N。nH2O-2N牌号对应原数字牌号023245023240023235023230023220REO.4545454545不小于CeO:/REO.99.99599.9999.9599.999.0不小于10为0.0010.0030.02PreOn0.0010.0030.01稀土杂质/Nd2Ox0.0010.0010.01REOSm:030.00050.0010.001合量0.1合量1.0不大于Y:Oa0.000
2、50.0010.001化学成分其他稀土0.0010.0010.008(质量杂质合量分数)Fe:O0.0010.0020.0050.010.01%SiO:0.0020.0020.0050.010.01CaO0.0020.0050.010.010.02Al:O0.0020.010.020.02一非稀土杂质Mgo0.0020.0050.010.01一不大于PbO0.00050.0010.0020.003Na:O0.0050.010.020.05一ZnO0.0020.0030.0050.010.03cr0.010.050.050.050.08S0,0.010.020.030.030.03注：稀土杂质为除去主稀土元素Ce以及Pm和Sc以外的稀土元素总量3.3外观质量3.3.1产品为白色粉末。3.3.2产品应洁净，目视无可见夹杂物。4试验方法4.1化学成分4.1.1稀土总量(RE0)的分析方法按照GB/T14635的规定进行。4.1.2稀土杂质含量的分析方法按照GB/T18115.2的规定进行。4.1.3除非稀土杂质二氧化硅(SiO2)外，其他非稀土杂质含量的分析方法按照GB/T16484的规定进行。2
