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The Development and Application on Excessive Sludge Disintegration of a New-style Cavitator Yonggang Huang1, a, Hongwei Yang2,b, Yue Wang3,c and Xiaomin Hu1,a 1 School of Mechanical Engineering & Automation, Northeast University, Shenyang,China 2 Shengjing Affiliated Hospital, China MedicalUniversity, Shenyang, China 3 Chinese Research Academy of Enviromental Sciences,Beijing,China ayghuang@mail.neu.edu.cn, b 893770131@qq.com, c41161946@qq.com Keywords: excessive sludge; cavitaiton3 device; hydrodynamic cavitation; cells disintegration Abstract.
Alkaline thermal sludge hydrolysis[J], Journal of Hazardous Materials. 97(1-3):295-314 ,2003
[8] Neyens E., Baeyens J., Weemaes M., De heyder, Hot acid hydrolysis as a potential treatment of thickened sewage sludge [J], Journal of Hazardous Materials. 98(1-3):275-293, 2003

Département des sciences des matériaux, faculté de génie mécanique et génie des procédés, USTHB, BP N°32 , 16111 EL ALIA Bab Ezzoouar Alger, Algérie. 2 Laboratoire Science et Génie des matériaux.
Materials The starting material was alumina powder issued from the Bayer process (d50 = 1.5µm) and different minerals that leads to oxides additives (SiO2, MgO, CaO, ZrO2).
Table 1: Composition and characteristics of alumina ceramic materials (wt %).
Mechanism of transfer film formation during repeat pass sliding of ceramic materials, Wear 140, (1990), 191-206
Relationships between microstructure, mechanical and dielectric properties of different alumina materials, Journal of the European Ceramic Society 29, (2009), pp.2747-2756

Fig. 2 XPS of the Cu2O/P25 p-n heterostructure composite materials.
(A) XPS survey spectrum of the Cu2O/P25 p-n heterostructure composite materials.
The morphology of P25 and as-prepared Cu2O/P25 p-n heterostructure composite materials with different ratio of raw materials were investigated by SEM and shown in Fig 3.
S1 S2 P25 Cu2O S3 S4 P25 B Fig. 3 SEM images of P25 and Cu2O/P25 p-n heterostructure composite materials with different ratio of raw materials.
European Journal of Inorganic Chemistry, 2013. (8): p. 1358-1362

Oxidation Behavior of Ti3SiC2-SiC Ceramic Composites Degui Zhu and Zhigang Wang Key Laboratory of Advanced Technologies of Materials, Ministry of Education, School of Materials Science & Engineering, Southwest Jiaotong University, Chengdu 610031, China dgzhu@home.swjtu.edu.cn Keywords: Ti3SiC2-SiC ceramics; oxidation resistance; hot isostatic pressing Abstract.
Full dense Ti3SiC2-SiC composite materials are successfully manufactured by in-situ synthesis under hot isostatic pressing in this study, in which, with raw materials of SiC-TiH2-C powders mixture.
When elongating the oxidation time, the rate of oxidation obviously decreases because of the high temperature autotherapy oxidation resistance of the composite materials.
Zhang: The Chinese Journal of Nonferrous Metals，2002, 12(4), p.629 [6] M W Barsoum, T.
Ai: Journal of Ceramics, 2000, 21(4), p.190 [9]C.

The research of SiC and Si3N4 whiskers reinforced Si3N4 composites to improve its wear and mechanical properties Lianwei YANG 1,a, Jinhui Li2,b ,Ruijie WANG3,c 1Department of Material Science and Technology, Northeastern  University at Qinhuangdao Branch, Qinhuangdao 066004, China 2Department of Environment  Science and Technology, Tsinghua University, Beijing,10004 ,China 3Department of Environment  Science and Technology, Northeastern  University at Qinhuangdao Branch, Qinhuangdao 066004, China aemail: yllwo@126.com, bemail:yllw0@126.com, cemail: ruijiewang@163.com Keywords: SiC whisker; wear; Si3N4; composite; Abstract: To improve the wear and mechanical properties, SiC and Si3N4 whiskers reinforced Si3N4 composites were sintered by hot press sintering technique at 1800 and 1900°C for 1 h.
This uneasy fracture of the whiskers is the main reason for improvement in fracture toughness, and thus, the decrease in wear rate compared with those of the samples sintered at higher temperature and Si3N4 material.
By incorporation of Si3N4 ‘seed' particles and whiskers or whiskers made of other materials such as SiC, silicon nitride ceramics have been much improved not only in fracture toughness, but in wear properties compared with monolithic Si3N4 in both dry and lubricated conditions; the lower wear rate is probably related to improved fracture toughness or pull-out of the whiskers [1, 2, 3, 4, 5, 6,].
For comparison, the properties of the Si3N4 material are also shown in Table 2.
Journal of the European Ceramic Society. (2000), P.453

In the precise grinding of nano materials, the plastic removal mechanism dominated the process.
In precision grinding nano-materials, the dominant material removal mechanism was plastic deformation.
In the precise grinding of nanophase materials, the plastic removal mechanism dominated the process.
He, et al: Experimental Technique X-radial Diffraction(Shanghai science and technology Publications, China 1988) [5] Q.Z.
Hu: Journal of Guangzhou Chemistry Vol. 25/3(2000), p.33

Introduction Micro cutting is a rapid and low-cost machining ways of micro component without restriction of material, and it is possible to realize micro processing of component of simple characteristics and component of complicated 3D curve-surface by using CNC machining center [1].
References [1] Cheng-Zhe Jin, Ik-Soo Kang, Jin-Hyo Park, Su-Hoon Jang, Jeong-Suk Kim: Journal of Mechanical Science and Technology.Vol. 23 (2009), P.2823-2829 [2] Andrew Honegger, et al: Journal of Manufacturing Science and Engineering.
Vol.25(2005), P.888-894 [4] Lee J H, et al: Journal of Manufacturing Science and Engineering.
Vol .128(2006), P.820-825 [5] Ashwin Balasubramanian, et al: Journal of Manufacturing Science and Engineering.
Vol .40(2000), P.856~861 [9] Y.Ketema: Journal of sound and vibration.

China Civil Engineering Journal, 1999,32(2): 3-8(in Chinese)
Journal of Huangzhong University of Science and Technology (Nature Science),2006,(34)5:111-114(in Chinese)
China Civil Engineering Journal,2006, 39(3): 42-46(in Chinese)
Beijing: Science Press,2002: 93-96(in Chinese)
China Civil Engineering Journal, 2003, 36(8): 1-6(in Chinese)

Effect of α-Al2O3 micro powder on performance of porous plug well block Zhihui Li, Sen Wang, Jing Li, Feng Wu （University of Science and Technology Liaoning，Anshan Liaoning，114051） amlzh@126.com Keywords：α-Al2O3 micro powder, Ladle, Porous plug well block Abstract：In connection with broken-down mechanics of ladle porous plug well block，with tabular alundum, allitic spinel, industrial chrome oxide as the main raw material and aluminate cement and active α-Al2O3 micro powder as binder，we prepare 9 groups porous plug well block samples，for studying the species of α-Al2O3 micro powder and impact of its addition on the properties of samples．By testing room temperature flexural strength of samples, room temperature compression strength，flexural strength after sintering at 1600℃ and heating for 3 hours, compression strength after burning，bulk density and apparent porosity before burning and after burning，thermal shock, high temperature bending strength and other performance indicators．The
Experimental The starting materials include tabular corundum, spinel, tabular corundum powder, α-Al2O3,chromium trioxide, aluminate cement, organic fiber.
Fig. 7 Loss factor of relict flexural strength of samples，% Conclusions (1) Taking tabular corundum, spinel, chromium trioxide as starting materials,α-Al2O3, and aluminate cement as binder, the well block was made by means of casting and possess good physical and chemical properties, which meets the requirements for application
Acknowledgements This work was financially supported by the National Natural Science Foundation (No.50874061) and Special Resource Protection Office of Liaoning Province (No.MZ018；No.MZ016).
Refractory, 2003, 37(4):221-222 [2] Junhui Ren, Yun Ren, Junzhan Zhang The influence of spinel on corundum-spinel castable, Journal of sillicates, 209, 28(1): 90-93

These include: Elasticity: The ability of the material to regain its original shape after deformation Plasticity: The capacity of a material to resist breakage when undergoing permanent material deformation.
International Journal of Science and Research (IJSR), vol. 4, 2015, pp. 5-611.14
The International Journal of Advanced Manufacturing Technology, vol. 84, 2021
International Journal of Design Engineering, vol. 5, no. 4, 2014, pp. 358-373
Materials Evaluation, vol. 68, no. 5, 2010, pp. 26-31