金剛石超細粉體粒度測試中分散條件的探索

編號：CSJS00015

篇名：金剛石超細粉體粒度測試中分散條件的探索

作者：張玉敏; 劉桂華;

關鍵詞：金剛石超細粉; 粒度分析; 分散條件;

機構： 中南大學化學化工學院; 中南大學冶金科學與工程學院 長沙;

摘要： 粒度的準確測定關系到金剛石性能的表征。本文研究了試樣濃度、超聲波強度、分散時間及分散劑的加入對金剛石微粉粒度測定結果的影響,結果表明,試樣濃度低或高,粒度測定結果偏大;超聲波強度的增大和超聲波分散時間的延長明顯地有利于粒子的分散,有利于粒度的準確測定;加入適量的分散劑六偏磷酸鈉后,測試結果重現(xiàn)性好。 The exact size detection of ultrafine diamond affects a lot its performance characterization.The influence of concentration of the sample,intensity of ultrasonic,dispersing time and dispersant on the size measurement was studied.The results showed that the increase or decrease of concentration of the sample led to the error increase.The increased intensity of ultrasonic and prolonged dispersing time favorates exact size detection of ultrafine diamond.The addition of dispersant of sodium hexametaphosphate fa...