本文關(guān)鍵詞：前驅(qū)物法低溫合成六方氮化硼，由筆耕文化傳播整理發(fā)布。

前驅(qū)物法低溫合成六方氮化硼

Low Temperature Synthesis of Hexagonal Boron Nitride by Precursor Method

[1] [2] [3]

FENG Yan-chun,ZHONG Jian-chu, WANG Hong-zhi （Department of Materials Science and Chemical Engineering, School of Chemical Engineering, Dalian University of Technolgy, Dalian 116

大連理工大學(xué)化工學(xué)院材料化工系,大連116024

文章摘要：本文以三聚氰胺和硼酸為原料,先采用濕化學(xué)法合成棒狀前驅(qū)物,然后將其在空氣氣氛中高溫培燒制得六方氮化硼。實(shí)驗(yàn)考察了反應(yīng)原料配比,反應(yīng)物濃度,高溫培燒的時(shí)間及溫度對(duì)產(chǎn)物的影響。采用IR、化學(xué)分析、XRD、粒度分析和SEM等方法對(duì)前驅(qū)物及產(chǎn)物進(jìn)行了表征,確定了前驅(qū)物及產(chǎn)物的組成、物相、粒度分布及形貌。研究結(jié)果表明：合成前驅(qū)物的適宜原料配比是C3N6H6∶H3BO3=1∶2,濃度為0.4 mol/L,合成的前驅(qū)物是分子式為C3N6H6.2H3BO3的棒狀超分子加合物;在溫度950℃,空氣氣氛中培燒6 h能得到晶型良好、平均粒徑為15μm的六方氮化硼粉體。

Abstr：In this paper, a kind of precursor was prepared by a wet chemical approach using melamine （ C3N6H6 ） and boric acid （H3BO3 ） as starting material, hexagonal boron nitride was then synthesized by the high temperature treatment of the precursor in the air. To get an insight into the synthesis process of boron nitride, the effects of melamine to boron acid molar ratio, the solution concentration, the synthesis temperature and time were respectively investigated. The precursor and product were respectively characterized by FT-IR, chemical composition, XRD, particle size analyses and SEM analyses. The results indicated that a better precursor is synthesized by using the molar ratio of 1 ： 2 for the melamine and boric acid and the solution concentration of 0.4 mol/L for the reactants, and the morphology of precursor that is identified as a supramolecular adduct exhibits a rod-like crystals and its molecular formula is C3N6H6·2H3BO3. Then the rod-like precursor is treated at 950℃ for 6 h to afford good crystals of h-BN powder with a primary particle size of 15 μm.

文章關(guān)鍵詞：

Keyword：:boron nitride melamine precursor

  本文關(guān)鍵詞：前驅(qū)物法低溫合成六方氮化硼，，由筆耕文化傳播整理發(fā)布。