四硼酸

四硼酸是一种无机化合物，化学式为H
2B
4O
7[2]。它是无色固体，可溶于水，可由硼酸的脱水或聚合得到。它在形式上是四硼酸根（[B
4O
7]2−）对应的酸。

四硼酸
别名 Tetraboric acid
识别
CAS号 12447-38-0
ChemSpider 450911
SMILES
 
  • OB(OB=O)OB(O)OB=O
性质
化学式 H2B4O7
摩尔质量 157.26 g·mol−1
外观 白色固体
密度 g cm−3
熔点 236 °C[1]
危险性
GHS提示词 警告
若非注明，所有数据均出自标准状态（25 ℃，100 kPa）下。

制备

四硼酸可由硼酸加热至170 °C以上得到：[3][4]

4 B(OH)
3 → H
2B
4O
7 + 5H
2O

参考文献
  1. Abdullah Selim Parlakyigit and Celaletdin Ergun (2022): "Facile synthesis method for in situ composites of TiB2/B4C and ZrB2/B4C." Journal of the Australian Ceramic Society, volume 58, pages 411–420. doi:10.1007/s41779-021-00700-3
  2. Greenwood, N. N.; & Earnshaw, A. (1997). Chemistry of the Elements (2nd Edn.), Oxford:Butterworth-Heinemann. ISBN 0-7506-3365-4.
  3. Gurwinder Kaur, Shagun Kainth, Rohit Kumar, Piyush Sharma and O. P. Pandey (2021): "Reaction kinetics during non-isothermal solid-state synthesis of boron trioxide via boric acid dehydration." Reaction Kinetics, Mechanisms and Catalysis, volume 134, pages 347–359. doi:10.1007/s11144-021-02084-8
  4. Siavash Aghili, Masoud Panjepour, and Mahmood Meratian (2018): "Kinetic analysis of formation of boron trioxide from thermal decomposition of boric acid under non-isothermal conditions." Journal of Thermal Analysis and Calorimetry, volume 131, pages 2443–2455. doi:10.1007/s10973-017-6740-3
This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.