首页期刊信息编委及顾问期刊发行联系方式使用帮助常见问题ENGLISH
位置:首页 >> 正文
725 ℃煅烧后托贝莫来石的结构和表面形貌变化
作者:胡彪1 崔崇1 崔晓昱1 秦娟1 马海龙2 
单位:1. 南京理工大学材料科学与工程学院 南京 210094 2. 宁夏大学民族预科教育学院 银川 750021 
关键词:托贝莫来石 脱羟基托贝莫来石 单斜链状硅灰石 煅烧 
分类号:O 76
出版年,卷(期):页码:2015,43(2):237-240
DOI:10.14062/j.issn.0454-5648.2015.02.16
摘要:

 利用微米尺度、无定形二氧化硅与氧化钙制备层间距d(002)为1.13 nm的托贝莫来石,研究了托贝莫来石高温煅烧过程中的结构变化和在725 ℃时的微结构变化规律。结果表明:725 ℃煅烧2 h后,部分托贝莫来石形成类单斜链状的硅灰石结构(结晶态)和脱羟基托贝莫来石(无定形态);这种无定型的亚稳状态结构的外貌和托贝莫来石的晶体外貌相似,都是针状、片状的晶体,和大量由片状与针状堆积形成的颗粒状结构;在725 ℃煅烧温度下,部分微米、亚微米尺度的托贝莫来石转变为单斜链状的硅灰石结构。

My wife cheated on me why wives cheat on husbands reasons married men cheat
abortion pill abortion pill abortion pill

  Tobermorite with basal spacing (d(002)) of 1.13 nm was synthesized with submicron-sized amorphous silicon dioxide and calcium oxide. The structure and morphology changes of tobermorite calcined at 725 ℃ for 2 h were investigated. The results show that dehydroxylation tobermorite and monoclinic α-CaSiO3 crystals appear after calcination. The dehydroxylation tobermorite is amorphous, disordered and metastable. The morphology of calcined tobermorite is similar to that of uncalcined tobermorite, i.e., needle-like and lamellar, due to the lamellar twining and accumulative generation of the particles. Some submicron-sized tobermorite crystals transform into monoclinic α-CaSiO3 crystals after calcination at 725 ℃ for 2 h.

open cheat women go
My wife cheated on me why wives cheat on husbands reasons married men cheat
cialis discount coupons coupons for cialis 2016 cialis 2015 coupon
基金项目:
基金项目:科技重大专项(2012ZX04010032);(51468053)国家自然科学基金。
作者简介:
第一作者:胡 彪(1991—),男,硕士研究生。 通信作者:崔 崇(1957—),男,硕士,教授。
redirect go why women cheat on men they love
my wife cheated on me now what men and women husband cheat
参考文献:

 References:

[1] YANG Xiuli, CUI Chong, CUI Xiaoyu, et al. High-temperature phase transition and the activity of tobermorite [J]. J Wuhan Univ Technol-Mater, 2014, 9(22): 298–301.
[2] Tylar H F W. The dehydration of tobermorite [J]. Clays Clay Miner, 1959, 6(1): 101–109.
[3] Shaw S, Clark S M, Henderson C M B. Hydrothermal formation of the calcium silicate hydrates tobermorite (Ca5Si6O16(OH)2•4H2O) and xonotlite (Ca6Si6O17(OH)2): an in situ synchrotron study [J]. Chem Geol, 2000, 167(1/2): 129–140.
[4] Bernstein S, Fehr K T. The formation of 1.13nm tobermorite under hydrothermal conditions: 1.The influence of quartz grain size within the system CaO-SiO2-D2O [J]. Prog Cryst Growth Charact Mater, 2012, 58(2/3): 84–91.
[5] Shaw S, Henderson C M B, Komanschek B U. Dehydration/ recrystallization mechanisms, energetics, and kinetics of hydrated calcium silicate minerals: an in situ TGA/DSC and synchrotron radiation SAXS/WAXS study [J]. Chem Geol, 2000, 167(1/2): 141–159.
[6] YANG Xiuli, CUI Chong, CUI Xiaoyu, et al. Study on the perfofmance of early strength and calcined activity of fly ash aerated concrete [J] .Chin Concr Cem Prod, 2014, 8: 1–5.
[7] Garra W, Marchetti F, Merlino S. Tb/Na tobermorite: Thermal behaviour and high temperature products [J]. J Solid State Chem, 2009, 182(6): 1529–1532.
read percentage of women who cheat signs of infidelity
my husband cheated on me men who have affairs women who cheat on husband
服务与反馈:
文章下载】【加入收藏
中国硅酸盐学会《硅酸盐学报》编辑室
京ICP备10016537号-2
京公网安备 11010802024188号
地址:北京市海淀区三里河路11号    邮政编码:100831
电话:010-57811253  57811254    
E-mail:jccs@ceramsoc.com