四硼酸锶(SrB4O7)的制备新工艺及其影响因素

材料研究学报

2010, Vol. 24

Issue (1): 108-112

研究论文

本期目录 | 过刊浏览

四硼酸锶(SrB4O7)的制备新工艺及其影响因素

张林进; 叶旭初

南京工业大学材料化学工程国家重点实验室材料科学与工程学院南京 210009

New Preparation Process and Influencing Factors of Strontium Tetraborate (SrB₄O₇)

ZHANG Linjin; YE Xuchu

State Key Laboratory of Material-Oriented Chemical Engineering; College of Material Science and Engineer;
Nanjing University of Technology; Nanjing 210009

引用本文:

张林进叶旭初. 四硼酸锶(SrB4O7)的制备新工艺及其影响因素[J]. 材料研究学报, 2010, 24(1): 108-112.
, . New Preparation Process and Influencing Factors of Strontium Tetraborate (SrB₄O₇)[J]. Chin J Mater Res, 2010, 24(1): 108-112.

全文: PDF(1065 KB)

摘要:

采用液相沉淀法合成两种水合硼酸锶SrB₂O₄ ?4H₂O和SrB₆O₁₀ ?5H₂O, 将其高温煅烧制备出纯四硼酸锶(SrB₄O₇)相, 分析了高温煅烧过程、产物的物相和形貌, 研究了煅烧温度和保温时间等因素的影响。结果表明, 在加热过程中水合硼酸锶发生脱水 → 非晶化→ 晶化过程, 且SrB₆O₁₀在800℃左右分解为SrB₄O₇和液态氧化硼; 将SrB₂O_4 ?4H₂O和SrB₆O_10 ?5H₂O在900℃煅烧4 h可制得纯相四硼酸锶; 延长煅烧时间可提高产物的晶化程度, 但是其晶型没有明显的变化。用该法制备的SrB₄O₇:Eu荧光粉, 其发光强度明显比以SrCO₃和H₃BO₃为原料制备的样品高。

关键词 ：无机非金属材料 , 四硼酸锶 , 高温煅烧 , 煅烧温度 , 保温时间

Abstract：

Two hydrated strontium borate (SrB₂O₄·4H₂O and SrB₆O₁₀·5H₂O) were synthesized by liquid-phase precipitation method, and pure phase strontium tetraborate (SrB₄O₇) was obtained by high temperature calcination. The phase compositions, morphology and the high temperature sintering process of products were characterized by XRD, SEM, TG-DTA and chemical composition analysis. The effects of calcining temperature and holding time were investigated. The results show that the process of dehydration→amorphization→crystallization exists in the calcination of hydrated strontium borate. SrB₆O₁₀is unstable at 800^oC, and decomposed into SrB₄O₇ and liquid boron oxide. Pure strontium tetraborate was obtained with SrB₂O₄·4H₂O and SrB₆O₁₀·5H₂O as raw materials, which were calcined at 900^oC for 4 h. With the increasing of reaction time, the crystallization degrees of products are improved, but the crystal structures are unaffected essentially. SrB₄O₇:Eu phosphors were prepared using this method. It is also found that the emission intensity from the sample is higher than that synthesized using SrCO₃ and H₃BO₃ as raw materials.

Key words： inorganic non-metallic materials strontium tetraborate high-temperature calcination calcining temperature holding time

收稿日期: 2009-05-05

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