Effect of pH on the Hydrothermal Synthesis of BN Nanocrystals  

作　　者：Wei FANG Xiao Peng HAO Ning LUN Xian ZHAO De Liang CUI Xu Tang TAO Min Hua JIANG 

机构地区：[1]State Key Lab of Crystal Materials, Shandong University, Ji＇nan 250100 [2]School of Material Science ＆ Engineering, Shandong University, Ji＇nan 250011

出　　处：《Chinese Chemical Letters》2006年第4期537-540,共4页中国化学快报（英文版）

基　　金：This work was supported by the National Natural Science Foundation of China （NNSFC, No. 20473048, 50272036, 50302005, 90206042）;Key Project of Science ＆ Technology Research of Ministry of Education （KPSTR）;Specialized Research Fund for the Doctoral Program of Higher Education （SRFDP, No. 20020422057）.

摘　　要：Boron nitride （BN） has been synthesized using hydrothermal synthesis method. The experimental results showed that the pH value of the reaction solution has an important effect on the yield and phases of BN samples. As the pH value decreased, the content of cBN increased and the yield improved. The increase in cBN content is resulted from the conversion of oBN into cBN under hydrothermal condition, and the growth of cBN nanocrystals may due to the decrease in the reaction speed, thus the crystalline perfection of BN improved when the pH value decreased.Boron nitride （BN） has been synthesized using hydrothermal synthesis method. The experimental results showed that the pH value of the reaction solution has an important effect on the yield and phases of BN samples. As the pH value decreased, the content of cBN increased and the yield improved. The increase in cBN content is resulted from the conversion of oBN into cBN under hydrothermal condition, and the growth of cBN nanocrystals may due to the decrease in the reaction speed, thus the crystalline perfection of BN improved when the pH value decreased.

关 键 词：Hydrothermal synthesis pH value boron nitride 

分 类 号：O613.81[理学—无机化学] O613.61[理学—化学]