详细研究了激光粒度分析法测量氧化钇粉体粒径的条件.结果表明,分散剂的种类及用量、氧化钇粉体用量、超声波功率和超声时间等对粉体平均粒径的测量结果有较大的影响.对于纳米级或亚微米级氧化钇粉体的粒度测量,适宜的条件:用pH为8.0的氢氧化钠水溶液配制质量浓度为1.0 g/L的多聚磷酸钠溶液作为分散介质,氧化钇用量100 mg/L,超声波功率为300 W,超声时间为10 min,测试折射率为1.65.%The conditions of measuring the particle size of yttrium oxide powder by laser particle size analysis were studied in detail.The results showed that the type and amount of dispersant,the amount of yttrium oxide powder,ultrasonic power,and ultrasonic time had great influence on the test results of the average particle size of the powder.For the measurement of particle size of nanometer or submicron powder of yttrium oxide,the suitable conditions were obtained as follows:preparing 1.0 g/L poly sodium phosphate solution with sodium hydroxide with pH of 8.0 as the dispersion medium,the dosage of yttrium oxide was 100 mg/L,ultrasonic power was 300 W,ultrasonic time was 10 min,and refraction rate was 1.65.
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