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Preparation and Characterization of Alkaline Resistant Porous Ceramics from Potassium Titanate Whiskers

ISSN号：1004-9541
期刊名称：《中国化学工程学报：英文版》
时间：0
分类：TQ174[化学工程—陶瓷工业;化学工程—硅酸盐工业]
作者机构：[1]State Key Laboratory of Materials-oriented Chemical Engineering, Nanjing University of Technology, Nanjing 210009, China, [2]Information College of Science and Technology, Nanjing Forestry University, Nanjing 210037, China
相关基金：Supported by the Funds for 0utstanding Young Researchers from the National Natural Science Foundation of China （Nos.29925616, 20428606）, the National Natural Science Foundation of China （Nos.20236010, 20246002, 20376032）, the Natural Foundation of Jiangsu Province （BK2004215）, the National High Technology Development Program of China （No.2003AA333010, No.2006AA03Z455）, the State Key Development Program for Basic Research of China （No.2003CB615700）, CNPC Program （W06-03C-01-03-02）.

关键词：钛酸钾晶, 须耐碱多孔陶瓷, 制备, 表征, ceramics, alkaline resistance, sintering, potassium titanate

中文摘要：

从钾泰坦的碱的抵抗多孔的陶艺的准备和描述吃了络腮胡子被学习。在络腮胡子预先形成(K2Ti6O13 和 K2Ti4O9 的混合物) 的 K2Ti4O9 络腮胡子完全在 960 ° C 被变换成 K2Ti6O13。在把陶艺的力量，孔和渗透弄弯的碱的抵抗以及变化被改变 K2Ti6O13 络腮胡子的内容比 50% 高的在预先形成(臼齿的部分) 的作文调查。多孔的 K2Ti6O13 陶艺的碱的抵抗在苛性的 NaOH 答案被发现比 Al2O3 的高得多，并且进一步的学习显示 K2Ti6O13 陶艺能稳定地在 pH 】的答案被使用 2.0。开始有在直到 66% 的预先形成(臼齿的部分) 然后减少的未加工的 K2Ti6O13 的内容的弯曲力量增加，与孔和渗透的行为相反。把从 80% 的预先形成(臼齿的部分) 准备的陶艺的力量，孔和渗透弄弯的价值未加工的 K2Ti6O13 络腮胡子是分别地 56MPa， 29.4% 并且 330L .m ? 2 .h ? 1，它比得上多孔的 Al2O3 陶艺的那些。

英文摘要：

The preparation and characterization of alkaline resistant porous ceramics from potassium titanate whiskers are studied. K2Ti4O9 whiskers in the whisker preforms （mixtures of K2Ti6O13 and K2Ti4O9） were completely converted to K2Ti6O13 at 960℃. The alkaline resistance as well as the change in bending strength, porosity and permeability of the ceramics was investigated by altering the composition of the preforms in which the content of K2Ti6O13 whiskers was higher than 50% （molar fraction）. The alkaline resistance of the porous K2Ti6O13 ceramics is found much higher than that of Al2O3 in caustic NaOH solutions, and further study indicates that the K2Ti6O13 ceramics can be stably used in solutions of pH〉2.0. The bending strength increases initially with the content of the raw K2Ti6O13 in the preforms up to 66% （molar fraction） and then decreases, contrary to the behaviors of porosity and permeability. The values of bending strength, porosity and permeability of the ceramics prepared from the preform of 80% （molar fraction） raw K2Ti6O13 whiskers are respectively 56MPa, 29.4% and 330L·m^-2〈h^-1 , which are comparable to those of the porous Al2O3 ceramics.

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