陶瓷

Microstructural observation revealed that a lot of epitaxial growth fibrous AlN polytype occurred in matrix. Y_2O_3 seems to act as a densifier for in-situ formation material and as medium for growth of fibrous polytype. SiO_2 is the growth promoter for fibrous polytype. The occurrence of fibrous polytype may increase the strength and toughness of AlN ceramic composite material.

实验结果表明，AlN-Y_2O_2-SiO_2系陶瓷复合材料的抗弯强度和断裂韧性较AlN陶瓷均有大幅度的提高，微观结构观察发现基体中存在大量共生的纤维状AlN多型体(27R，21R)，系统中Y_2O_3不仅是原位生长复合AlN材料的致密剂，而且是纤维状多型体生长的媒介，SiO_2，是纤维状多型体生长的助生长剂，基体内纤维状多形体的存在提高了AlN陶瓷的强度和韧性。

And ceramic waste for recycling, use, waste production of porcelain clay porcelain products, ceramic not only solve the garbage problem, but also to achieve environmental protection objectives.

和回收，利用陶瓷废料，废瓷土生产陶瓷产品，陶瓷不仅是解决垃圾问题，而且也为实现环保目标。

The experimental results indicated that these metal oxide catalysts had better catalytic activities to the methylene chloride gas at low concentration, and the catalytic activities increased with the increase of temperature,but decreased with the increase of inlet gas concentration. The CrO3/potsherd catalytic activity was better than V2O5/potsherd, and the CrO3/potsherd catalyst displayed higher activity at the relative low temperature. When the reaction temperature was 320 ℃, the conversion rate could reach 99%, and the result of 100h catalyst stability experiment show that the catalytic activities have good stability.

实验结果表明此类金属氧化物催化剂对低浓度CH2Cl2气体有较好的催化活性，催化剂的活性随温度升高而升高，随入口废气浓度增大而降低，其中CrO3/陶瓷片催化剂的催化活性比V2O5/陶瓷片催化剂的活性好，CrO3/陶瓷片催化剂在较低温度下就表现出较高反应活性，在反应温度320℃时，转化率即达到99%，同时催化剂100h稳定性实验结果表明催化剂活性有很好稳定性，为进一步工业化应用提供理论和实践依据。

Joining of ceramics and ceramic matrix composites by using preceramic polymer s is a novel technique with lower cost and higher joining strength.

用陶瓷先驱体有机聚合物连接陶瓷及陶瓷基复合材料是一种成本低廉、工艺新颖、可满足特殊高温条件下连接件要求的新型连接技术。

In this topic, the dynamic analysis methods for piezoelectric vibrator are studied systematically based on the theoretical model, FEM numerical experimentation and FEM governing equation for given compound-mode vibrator, and some valuable conclusions are obtained. The main work accomplished is summarized as follows: 1.Elaborate the main modeling methods for piezoelectric vibrator and the significance and necessity to study the dynamic characteristics of piezoelectric vibrator which emphasize the urgency of this paper. 2.Take the bending deformation induced by piezoelectric ceramic as example, the energy transfer mechanism of electric energy to mechanical energy are analyzed; the motion and force transfer mechanism are analyzed for the longitudinal-bending vibrator. 3.Based on mode assumption and Hamilton principle, the coupling model of piezoelectric vibrator of linear USM is built; moreover, the equivalent circuit model is obtained and a coupling equation represents the relation between electric parameters and mechanical parameters is derived which provides foundation to match the vibrator and driving circuit. 4.Combine the constitutive equation of piezoelectric ceramic with elastic-dynamical equation, geometric equation in force field and the Maxwell equation in electric field and the corresponding boundary condition equation, the FEM control equation for piezoelectric vibrator of USM to solve dynamic electro-mechanical coupling field is established by employing the principle of virtual displacement. The equation lays the foundation to study the non-linear constitutive equation of piezoelectric ceramic driven by high-power. 5.Define the dynamic indexes of characteristic of vibrator and carry out variable parameters simulation by calculating the model parameters and the electric characteristics of vibrator are simulated according to the equivalent circuit model. By numerical experimentation, the working mode of vibration of vibrator and the shock excitation results of the working frequency band which provides the mode frequency to realize bimodal are analyzed. Detailed calculation of the electro-mechanical coupling field parameters is made by programming the FEM control equation.

本课题从理论模型、有限元数值试验、有限元控制模型等方面以复合振动模式振子为例对超声电机压电振子的动力学特性及其分析方法进行了全面系统地研究，得出了许多有价值的结论，主要概括如下： 1、阐述了目前针对超声电机压电振子的主要建模方法，对压电振子动态特性的研究意义和必要性进行了论述，突出了本文研究内容的迫切性； 2、以压电陶瓷诱发弹性体发生弯曲变形为例，分析了压电陶瓷通过诱发应变来实现机电能量转换的机理；对基于纵弯模式的压电振子的运动及动力传递机理进行了分析； 3、基于模态假定，利用分析动力学的Hamilton原理，建立了面向直线超声电机压电振子的机电耦合动力学模型，并据此建立了压电振子的等效电路模型，导出了电参量与动力学特性参量的耦合方程，为压电振子与驱动电路的匹配提供了依据； 4、从压电陶瓷的本构方程出发，综合力场的弹性动力学方程、几何方程、电场的麦克斯韦方程以及相应的边界条件方程，采用虚位移原理，建立了压电振子动态问题机电耦合场求解的有限元控制方程，为研究其大功率驱动下的非线性本构模型奠定了基础； 5、界定压电振子的动力学特性指标，对压电振子的机电耦合动力学模型参数进行计算及变参数仿真；依据等效电路模型，对压电振子的电学特性进行了仿真分析；通过有限元数值实验，对压电振子工作模态附近的模态振型及工作频率附近的频段进行了激振效果分析，找出了实现模态简并的激振频率；利用有限元控制方程，通过编程计算，对压电振子的力电耦合场参数进行了详细计算，得出了一些有价值的结论。

Experimental study of high temperature phase transformation for pyrophyllite

利用场发射扫描电镜表征了Zr-Co粉体的形貌特征和烧结后的陶瓷薄膜结构，热重分析了Zr-Co粉体烧结过程的失重和相转变吸放热过程，X射线衍射分析跟踪了不同温度段烧结体系的组成变化趋势，在此基础上对粉体烧结后陶瓷薄膜的防氧化效果进行了分析，结果表明：温度对粉体的颗粒形貌和晶相结构有较大的影响，高温烧结的粉体性质稳定，经过1200℃烧结后的陶瓷膜层具有很好的致密性，具有很好的防氧化效果。

The recompression phenomena have been found in the particle velocity histories of alumina specimens while the impact pressure between 7GPa-8GPa. From the point of view of phenomena, the recompression signals in terms of free surface particle velocity occurring in alumina ceramics under shock-loaded were similar to those in glass where failure wave has been widely verified.(4)The modified form for the Hugoniot Elastic Limit was given associated with

得到了A95陶瓷采用Drucker-Prager准则修正公式计算的σHEL值，并与实验得到的σHEL值进行了比较；(5)采用ANSYS/LS-DYNA有限元分析软件对冲击压缩下氧化铝陶瓷动态力学性能进行了模拟分析，数值模拟结果与实验结果吻合较好，数值模拟结果表明JH-2材料模型能够较好地模拟陶瓷的物理力学性能。

Quad is located in Foshan City, Jihua Road Interchange and fog Gang,"meaning the United States Sanitary Ware Ceramics World", from the street, Foshan Lanshi River dang shares Joint Economic and Social development; formerly known as the "river dang ceramic wholesale direct marketing positions" was built in 1994, is a wholesale market in Foshan, one of the early pottery.

位于佛山市季华四路与雾岗路交汇处的"意美家卫浴陶瓷世界"，由佛山市禅城区澜石街道河宕股份经济联合社开发；原名为"河宕陶瓷批发直销仓"，建于1994年，是佛山市早期陶瓷批发市场之一。

Recent research progresses of behavior and mechanism about edge chipping were summarized, and edge spalling model, edge chipping by single indenter and edge chipping by scratch test were introduced, all of the merits and defects of them were evaluated, some issues need to be solved for them and some methods to prevent it taking place were presented.

综述了工程陶瓷边缘碎裂行为与机理的最新研究进展，详细阐述了工程陶瓷的边缘碎裂剥落模型、边缘碎裂单晶压头模型和边缘碎裂划痕模型，并对各模型的优缺点作了评价，提出了工程陶瓷边缘碎裂行为与机理研究中尚待解决的问题以及边缘碎裂预防措施。

A method is developed to solve the sequencing problem which occur among the complement of products with constrains of Earliness and Tardiness in ceramics production line with time lag between processes. Optimal thoughts are introduced into capacity balance of ceramics production line, and relevant model and heuristic algorithm is set up.

提出用遗传算法解决陶瓷产品在窑炉烧结中排序的优化模型，提出了解决产品配套中带滞留时间陶瓷生产线提前/拖期排序问题的方法，将优化思想引入陶瓷生产线的能力平衡中，建立了相应模型及启发式算法。

He and Nina moved to California and lived at 2005 Ivar Street, Apt.

他和Nina搬到加州，并在2005年伊瓦尔街，公寓生活。

Droperidol （ potently inhibits transfected HERGchannels and this is the probable mechanism for QT prolongation.

氟哌利多有效地抑制了转染的 HERG 钾通道，可能是 QT 间期延长的机制。