碱性条件下钛石膏晶须生长工艺及机理分析

硅酸盐通报 ›› 2022, Vol. 41 ›› Issue (8): 2828-2835.

碱性条件下钛石膏晶须生长工艺及机理分析

黄佳, 金应荣, 杨华琳, 陈伟, 李玉玲, 王志杰

西华大学材料科学与工程学院,成都 610039

收稿日期:2022-02-23 修回日期:2022-05-07 出版日期:2022-08-15 发布日期:2022-08-30
通讯作者: 金应荣,博士,研究员。E-mail:jinry@mail.xhu.edu.cn
作者简介:黄佳(1995—),女,硕士研究生。主要从事无机非金属材料方面的研究。E-mail:723395642@qq.com

Whiskers Growth and Mechanism Analysis by Titanium Gypsum under Alkaline Conditions

HUANG Jia, JIN Yingrong, YANG Hualin, CHEN Wei, LI Yuling, WANG Zhijie

School of Materials Science and Engineering, Xihua University, Chengdu 610039, China

Received:2022-02-23 Revised:2022-05-07 Online:2022-08-15 Published:2022-08-30

摘要/Abstract

摘要： 以工业副产钛石膏为原料,氢氧化钙饱和溶液为溶剂,七水硫酸镁为晶型助长剂,采用水热法制备α-半水硫酸钙晶须。研究了碱性环境下反应温度、反应时间、浆料固液比、晶型助长剂用量、体系总体积以及体系pH值对α-半水硫酸钙晶须产率及形貌的影响,分析了晶须的生长机理。结果表明在碱性水热环境中,钛石膏先转变为α-半水硫酸钙,再逐渐依附于既有晶须生长,形成粗大的晶须,在较优的工艺条件下,α-半水硫酸钙晶须产率可达71.6%,晶须表面光滑,长径比为70。

关键词: 钛石膏, 氢氧化钙, α-半水硫酸钙晶须, 水热法, 晶须产率

Abstract: The α-calcium sulfate hemihydrate whiskers were prepared by hydrothermal method with titanium gypsum as raw material, calcium hydroxide saturated solution as solvent and magnesium sulfate heptahydrate as crystal promoter. The effects of reaction temperature, reaction time, solid-liquid ratio of slurry, content of crystal promoter and volume of calcium hydroxide solution on the yield and morphology of α-calcium sulfate hemihydrate whiskers were investigated, the growth mechanism of whiskers was clarified, too. The results show that in alkaline hydrothermal environment, titanium gypsum first transforms into α-calcium sulfate hemihydrate and then grows into whiskers. Adhering to the existing whiskers is an important way of whisker growth. When the solid-liquid ratio of slurry is 1∶12, the temperature is 120 ℃, the reaction time is 8 h, and the content of crystal promoter is 6%, the α-calcium sulfate hemihydrate whisker has high yield and excellent performance. The whiskers yield with smooth surface can reach 71.6%, and the mean aspect ratio is 70.

Key words: titanium gypsum, calcium hydroxide, α-calcium sulfate hemihydrate whisker, hydrothermal method, whisker yield

中图分类号:

TQ132.32

黄佳, 金应荣, 杨华琳, 陈伟, 李玉玲, 王志杰. 碱性条件下钛石膏晶须生长工艺及机理分析[J]. 硅酸盐通报, 2022, 41(8): 2828-2835.

HUANG Jia, JIN Yingrong, YANG Hualin, CHEN Wei, LI Yuling, WANG Zhijie. Whiskers Growth and Mechanism Analysis by Titanium Gypsum under Alkaline Conditions[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2022, 41(8): 2828-2835.

参考文献

[1] ZHANG X T, RAN L W, WANG X, et al. Structural characteristic and formation mechanism of hemihydrate calcium sulfate whiskers prepared using FGD gypsum[J]. Particuology, 2022, 62: 98-103.
[2] GAO J, LI Q, LIU F L. Calcium sulfate whisker prepared by flue gas desulfurization gypsum: a physical-chemical coupling production process[J]. Chinese Journal of Chemical Engineering, 2020, 28(8): 2221-2226.
[3] 张紫瑞,汪燕青,马自明,等.用宁夏天然石膏制备半水硫酸钙晶须工艺研究[J].宁夏工程技术,2019,18(1):40-43+49.
ZHANG Z R, WANG Y Q, MA Z M, et al. Study on preparation process of calcium sulfate whiskers from ningxia gypsum by hydro thermal method[J]. Ningxia Engineering Technology, 2019, 18(1): 40-43+49 (in Chinese).
[4] 陈家伟,张仁亮.工业副产石膏资源化利用生态环境技术发展报告[J].广州化工,2020,48(24):1-3.
CHEN J W, ZHANG R L. Report on ecological environment technology development of industrial by-product gypsum resource utilization[J]. Guangzhou Chemical Industry, 2020, 48(24): 1-3 (in Chinese).
[5] 刘凤铃,彭佥赟,刘洪.钛石膏制备CaSO₄晶须[J].化工设计通讯,2018,44(1):70-72.
LIU F L, PENG Q Y, LIU H. Preparation of CaSO₄ whiskers by titanium[J]. Chemical Engineering Design Communications, 2018, 44(1): 70-72 (in Chinese).
[6] 鲍智江,李建隆,王伟文.硫酸钙在调和液中的溶解度[J].化学工程,1995,23(5):21-25.
BAO Z J, LI J L, WANG W W. Solubility of calcium sulfate in distiller liquor[J]. Chemical Engineering, 1995, 23(5): 21-25 (in Chinese).
[7] GURGUL S J, SENG G, WILLIAMS G R. A kinetic and mechanistic study into the transformation of calcium sulfate hemihydrate to dihydrate[J]. Journal of Synchrotron Radiation, 2019, 26(3): 774-784.
[8] HOU S C, WANG J, WANG X X, et al. Effect of Mg²⁺ on hydrothermal formation of α-CaSO₄·0.5H₂O whiskers with high aspect ratios[J]. Langmuir, 2014, 30(32): 9804-9810.
[9] XIN Y, HOU S C, XIANG L, et al. Adsorption and substitution effects of Mg on the growth of calcium sulfate hemihydrate: an ab initio DFT study[J]. Applied Surface Science, 2015, 357: 1552-1557.
[10] 王鑫,纪利俊,陈葵,等.pH与Ca²⁺浓度对磷石膏常压制备α-半水硫酸钙的影响[J].无机盐工业,2017,49(11):54-58.
WANG X, JI L J, CHEN K, et al. Effects of pH and Ca²⁺ concentration on formation of α-hemihydrate calcium sulfate by phosphogypsum under atmospheric pressure[J]. Inorganic Chemicals Industry, 2017, 49(11): 54-58 (in Chinese).
[11] 蹇守卫,孙孟琪,李小生,等.pH对磷石膏生产石膏晶须过程影响的研究[J].武汉理工大学学报,2015,37(2):22-27.
JIAN S W, SUN M Q, LI X S, et al. The study on the effect of pH on the production of phosphogypsum whisker[J]. Journal of Wuhan University of Technology, 2015, 37(2): 22-27 (in Chinese).
[12] 王宇斌,张鲁,毛欣钰,等.氢氧根对半水硫酸钙晶体形貌的影响机理[J].无机盐工业,2020,52(11):20-23+55.
WANG Y B, ZHANG L, MAO X Y, et al. Effect mechanism of hydroxide ions on morphology of calcium sulfate hemihydrate crystals[J]. Inorganic Chemicals Industry, 2020, 52(11): 20-23+55 (in Chinese).
[13] LUO K B, LI H P, TAN Y X. Study on the preparation of calcium sulfate whisker by hydrothermal method[J]. Advanced Materials Research, 2012, 602/603/604: 1369-1372.
[14] 王宇斌,文堪,王森,等.同离子效应对半水硫酸钙形貌的调控机理[J].高校化学工程学报,2018,32(6):1444-1449.
WANG Y B, WEN K, WANG S, et al. Regulation mechanism of common ion effect on the morphology of calcium sulphate hemihydrate[J]. Journal of Chemical Engineering of Chinese Universities, 2018, 32(6): 1444-1449 (in Chinese).

[1]	万宗华, 张文芹, 刘志超, 王发洲. 电石渣-矿渣复合胶凝材料性能研究[J]. 硅酸盐通报, 2022, 41(5): 1704-1714.
[2]	王倩, 彭同江, 孙红娟, 丁文金, 林艳. 钛石膏-H₂SO₄-H₂O体系中石膏-硬石膏的相变规律[J]. 硅酸盐通报, 2022, 41(2): 725-732.
[3]	王波, 段晓波, 邓丽荣, 王嘉博, 陆树河, 王晓刚. β-SiC粉体中常见金属杂质的亚临界水热去除工艺[J]. 硅酸盐通报, 2021, 40(8): 2713-2718.
[4]	王波, 段晓波, 邓丽荣, 陆树河, 王晓刚, 白枭. β-SiC粉体Si杂质的亚临界水热去除工艺[J]. 硅酸盐通报, 2021, 40(2): 591-596.
[5]	朱浩泽, 于峰泉, 耿健, 王向阳, 秦华彬. 钛石膏基可控低强度材料强度及体积稳定性研究[J]. 硅酸盐通报, 2021, 40(11): 3644-3653.
[6]	王文凯, 谭涓, 王诗涵, 邱鑫. 高硅铝比小晶粒NaY分子筛/高岭土复合物的合成及其催化裂化性能[J]. 硅酸盐通报, 2021, 40(10): 3479-3489.
[7]	时军;王晶;史忠祥;戴丽静. 表面活性剂对YMn2O5粉体微观形貌的影响[J]. 硅酸盐通报, 2020, 39(9): 3001-3007.
[8]	孙青;柯美林;撒玉彪;张俭;严俊;盛嘉伟. 水热法制备Bi2MoO6/埃洛石复合光催化剂及其性能研究[J]. 硅酸盐通报, 2020, 39(5): 1677-1680.
[9]	赵春洋;范文强;李春庆;王永;杨红健;刘晓莉. 碱式硫酸镁晶须对氯氧镁水泥性能的影响[J]. 硅酸盐通报, 2020, 39(2): 435-439.
[10]	季鸣童;郑伟超. 水热法制备氮掺杂石墨烯水凝胶及其超电容性能研究[J]. 硅酸盐通报, 2020, 39(2): 643-648.
[11]	燕可翀, 李子鹏, 李杨敏, 王平治. 粉煤灰碱熔-水热合成沸石用于水溶液中汞的吸附[J]. 硅酸盐通报, 2020, 39(12): 3939-3944.
[12]	华婉苏;马浩森;姜雨杭;李秋. 偏硅酸钠掺量对高硼废液水泥固化体力学性能的影响[J]. 硅酸盐通报, 2020, 39(10): 3260-3266.
[13]	李瑞珍;杨建伟;张志鹏;卢金山. 大理石废料水热法制备高白度碳酸钙粉体及其晶形控制[J]. 硅酸盐通报, 2019, 38(9): 2719-272.
[14]	李倩男, 王桂玲, 张卫民, 王欣昱, 陈俊明. 多孔球状Mn3O4的制备及电容特性研究[J]. 硅酸盐通报, 2019, 38(7): 2157-2161.
[15]	谈翔;李月明;王竹梅;高轶群;沈宗洋;乐少文;濮秦衡. 以CA为络合剂水热法合成硅酸锆粉体的研究[J]. 硅酸盐通报, 2019, 38(6): 1694-169.