Abstract:The effect of water vapor on the structure of anhydrous potassium pentaborate was studied at high temperature by self-designed reactor in the present paper. The vibration spectra of anhydrous potassium pentaborate crystal at high temperature were analyzed by X-ray diffraction spectrum(XRD), infrared spectrum(IR) and Raman spectrum. The ratio of B2O3 to K2O in potassium pentaborate was diminished by reacting with water vapor. XRD analysis shows that K5B19O31 exists in potassium pentaborate crystal at 750 ℃, while IR and Raman analysis show that some triangular structure units(B(3)—O) are changed to tetrahedral structure units(B(4)—O) in the crystal. The content of tetrahedral structure unit(B(4)—O) increases and the network configuration between boron and oxygen is farther broken.
张金平,杨刚,李佐虎. 无水五硼酸钾晶体高温性质振动光谱的研究[J]. 光谱学与光谱分析, 2006, 26(12): 2236-2239.
ZHANG Jin-ping,YANG Gang,LI Zuo-hu. Study on Vibration Spectrum and Properties of Anhydrous Potassium Pentaborate Crystal at High Temperature. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2006, 26(12): 2236-2239.
[1] TAO Lian-yin,ZHENG Xue-jia(陶连印,郑学家). Production and Application of Boron Compound(硼化合物的生产与应用). Chengdu:Chengdu University of Science and Technology Press(成都:成都科技大学出版社),1992. [2] GU Xue-min,GONG Yi-sheng,TANG Ka-luo(顾学民,龚毅生,汤卡罗). Inorganic Chemistry Series Second Edition, Beryllium,Alkaline Earth,Boron,Aluminium,Gallium(无机化学丛书第2卷, 铍,碱土金属,硼,铝,镓分族). Beijing:Science Press(北京:科学出版社),1990. [3] Thamizharasan K,Xavier Jesu Raja S,Xavier Francis P,et al. J. Cryst. Growth,2000,218:323. [4] Rajasekar S A,Thamizharasan K,Joseph Arul Pragasam A,et al. J. Cryst. Growth,2003,247:199. [5] Kemp P H. The Chemistry of Borates Part I. London: Borax Consolidated Limited S. W. I.,1956. [6] Filatov S K,Bubnova R S. Phys. Chem. Glasses,2000,41(5):216. [7] Krogh-Moe J. Acta Cryst.,1972,B28:168. [8] Krogh-Moe J. Arkiv. Fr Kemi.,1959,14:439, 567. [9] Jing Yan,Jia Yongzhong,Gao Shiyang,et al. Thermochimica Acta.,2001, 374:51. [10] Gurbuz H,Yavasoglu N,Bulutcu A N. Separ. Sci. Technol.,1996,31(6):857. [11] KEШAH A Д. Preparation and Study of Borate in Water Solution(硼酸盐在水溶液中的合成及其研究). Translated by CHENG Si-wei(成思危译). Beijing:Science Press(北京:科学出版社),1962. 64. [12] Dwivedi B P,Khanna B N. J. Phys. Chem. Solids,1995,56(1):39. [13] Kamitsos E I,Chryssikos G D,Karakassides M A. J. Non-Cryst. Solids,1990,123:283. [14] Youngman R E,Zwanziger J W. J. Non-Cryst. Solids,1994,168:293. [15] Umesaki N,Kita Y,Iida T,et al. Phys. Chem. Glasses,2000,41(5):304. [16] Handa K,Kita Y,Kohara S,et al. J. Phys. Chem. Solids,1999,60:1465. [17] Li Jun,Xia Shuping,Gao Shiyang. Spectrochimica Acta Part A,1995,51(4):519. [18] LIU Zhi-hong,GAO Shi-yang,XIA Shu-ping(刘志宏,高世扬,夏树屏). Spectroscopy and Spectral Analysis(光谱学与光谱分析),2003,23(2):291. [19] LI Xiao-ping,GAO Shi-yang,LIU Zhi-hong,et al(李小平,高世扬,刘志宏,等). Spectroscopy and Spectral Analysis(光谱学与光谱分析),2005,25(1):48.