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Mechanochemical Synthesis of Hydroxyapatite Bioceramics through Two Different Milling Media Sharifah Adzila1, 3 a, Iis Sopyan2b, Siti Farius2, Nurfahana2, Ramesh Singh1 1 Department of Engineering Design & Manufacture, Faculty of Engineering, University of Malaya, Kuala Lumpur, Malaysia 2 Department of Manufacturing and Materials Engineering, Faculty of Engineering, International Islamic University Malaysia, PO Box 10, 50728 Kuala Lumpur, Malaysia 3 Department of Materials Engineering and Design, Universiti Tun Hussein Onn Malaysia aadzila@uthm.edu.my, bsopyan@iium.edu.my Keywords: Mechanochemical, Hydroxyapatite, Water, Ethanol, Sintering, Dense Bioceramics.
Kaur, Preparation and characterization of porous hydroxyapatite through polymeric sponge method, Ceramics International. 35 (2009) 3161-3168
Hamdi, Synthesis of Nano sized hydroxyapatite powder using sol-gel technique and its conversion to dense and porous body, Indian Journal of Chemistry. 47A (2008) 1626-1631
Sopyan, Low temperature hydrothermal synthesis of calcium phosphate ceramics: effect of Ca excess precursor on phase behaviour, Indian Journal of Chemistry. 48A (2009) 1492-1500
Lin, Synthesis of Si-substituted hydroxyapatite by a wet mechanochemical method, Materials Science and Engineering C. 28 (2008) 57–63.

Loss mechanism of rare-earth tungsten cathode applied to high-temperature electrostatic precipitation Jinjin Xu1,a, Zhongzhu Gu2,b, Xiaoli Xi3,c, Weimin Dai2,d, Juanjuan Liu 2,e 1 School of Energy & Environment, Southeast University, Nanjing 210096, China 2 College of Power Engineering, Nanjing Normal University, Nanjing 210042, China 3 College of Material Science and Engineering, Beijing University of Technology, Beijing 100022, China a jinjinxu_seu@163.com, b guzhongzhu@njnu.edu.cn, cxixiaoli@bjut.edu.cn d dwm@foxmail.com, e liujuanjuan156@163.com To whom correspondence should be addressed: Zhongzhu Gu; E-mail: guzhongzhu@njnu.edu.cn; Tel: 86-25-85891105 Keywords：：：： Rare-earth tungsten; Thermionic emission; Cathode loss; Microstructure Abstact: Rare-earth tungsten thermionic emission material was used in the high-temperature electrostatic dust removal technology.
Materials Science and Engineering A. 2005, 394(1-2): 360-365; [2] Xi, X.L., Nie Z.
International Journal of Refractory Metals and Hard Materials. 2006, 24(3): 210-214; [4] Chen, A.
D., The study of noncorona high temperature electrostatic precipitation, proceeding of 27th symposium Engineering Aspects of Magneto hydrodynamics[J], USA,1989,3:1301-1307; [5] Gu,Z.Z.
,A Study on the Electron-emitting Characteristics in NHTHPESP， Proceeding of International Symposium on Energy Engineering[J]，Hang Kong,2000， 4:1653-1657; [6] Gu,Z.Z., Wu,W., Experimental Investigations on Non-Corona High Temperature High Pressure Electrostatic Precipitator[J], J. of NJNU, 2004, 2:66-73; [7] Writing Group of rare metal materials processing handbook, Rare Metal Materials Processing Handbook[M], Metallurgy Industry Press, 1984; [8] Editing committee of Nonferrous Extractive Metallurgy Handbook, Nonferrous Extractive Metallurgy Handbook- Rare refraetory metal (Ⅰ) [M], 2005.6: 173; [9] Qixiu Zhang, Qinsheng Zhao and etc.

Xu: Key Engineering Materials Vol. 416 (2009), pp 198-204
Malkin: ASME Journal of Manufacturing Science & Engineering Vol. 123 (2001) No.1, pp: 13-22
Malkin: ASME Journal of Engineering for Industry Vol. 117 (1995), pp: 160-168
Huang and X.P Xu: International Journal of Advanced Manufacturing Technology Vol. 41 (2009), pp: 16-23
Scattergood: ASME Journal of Engineering for Industry Vol. 113 (1991), pp: 184-189.

Akdoğan 2 1 Yildiz Technical University, Department of Metallurgy and Materials Science Engineering Istanbul/ TURKEY 2 Yildiz Technical University, Department of Mechanical Engineering Istanbul/ TURKEY Keywords: Ultrasonic Velocity, Castable Refractory, Refractory Concrete Abstract.
Ultrasonic measurements have also recently been used to evaluate porosity, cracks and inclusions in ceramics [9].
Chuang, Ultrasonic Testing of Artificial Defects in Alumina Ceramic, Ceramic International 23 (1997) 367-373 [6] A.Topuz, Tahribatsız Muayeneler, Yıldız Technical University, Department of Metallurgy, Number 281, Istanbul/Turkey [7] N.
Bhardwaj, Ultrasonic Characterization of Green and Sintered Ceramics: I, Time Domain, The Amer.
Phani, Ultrasonic Evaluation of Elastic Parameters of Sintered Powder Compacts, Journal of Material Science 29 (1994) 4415-4419 [14] S.K.

Lee 2 1 Department of Mechanical Engineering, Inha Univ., 253 Yonghyun-Dong, Nam-Gu, Incheon, Korea 2 School of Mechanical Engineering, Inha Univ.,253 Yonghyun-Dong, Nam-Gu, Incheon, Korea 1 leees@inha.ac.kr, 2peaceneo@hotmail.com Keywords: Centerless Grinding, Taguchi Method, Response Surface Method (RSM), Ferrule Abstract.
The workpiece, ferrule is the Ø2.5×10� diameters with the zirconia ceramics(ZrO2).
Response surface method Response surface methodology is a collection of statistical and mathematical methods that are useful for the modeling and analyzing engineering problems.
Lee, "A Study of the Development of an Ultraprecision Grinding System for Mirror-Like Grinding", The International Journal of Advanced Manufacturing Technology, Vol. 16, pp. 1-9, 2000 [2] E.
Kim, "A study on the Optimum Condition Selection of Rotary Dressing System of Ultra-Precision Centerless Grinding Machine for Ferrule", Key Engineering Materials Vols. 291-292, pp. 189-184, 2005 [3] Jae-Seob Kwak, "Application of Taguchi and response surface methodologies for geometric error in surface grinding process", Journal of Machine Tools & Manufacturing Vol. 45 pp. 327-334, 2005

Gandhi: International Journal of Machine Tools and Manufacture.
Zhang: Journal of Mechanical Engineering.
Stahl: Journal of Engineering for Gas Turbines and Power.
Bidhendi: International Journal of Machine Tools and Manufacture.
Onwubolu: International Journal of Machine Tools and Manufacture.

Laser deposition is an advanced manufacturing technology capable of enhancing service life of engineering components by hard-facing their functional surfaces.
Furthermore, the different parameter combinations are responsible for high values of clad width and reinforcement fraction which is desirable for hardfacing of surfaces of engineering components.
Clare, A parametric study on laser cladding of Ti-6Al-4V wire and WC/W2C powder, International Journal of Advanced Manufacturing Technology, 87 (2016) 3349-3358
Pal, Application of Taguchi-based gray relational analysis for evaluating the optimal laser cladding parameters for AISI1040 steel plane surface, International Journal of Advanced Manufacturing Technology, 66 (2013) 91-96
Antony, Multi-response Optimization in Industrial Experiments Using Taguchi’s Quality Loss Function and Principal Component Analysis, Quality and Reliability Engineering International, 16 (2000), 3-8

Introduction Coal is considered mostly as a source of energy, and according to International Energy Agency Statistics, the global consumption was 5.5 billion tons in 2015 [1].
In previous work, Mongolian fly ash has been used in the preparation of geopolymers [8-10] zeolitic compounds [11-12] and rare earth oxide doped glass ceramics [13].
References [1] J.Li, J.Wang, Comprehensive utilization and environmental risks of coal gangue: A review, Journal of Cleaner Production 239 (2019) 117946
Proceedings of the International Conference on nano materials, pp.126-133, doi: 10.18101/ 978-5-9793-0898-2-126-133
[15] Z.Zhao, F.Xiao, S.Amirkhanian, Recent applications of waste solid materials in pavement engineering, Waste Manage. 108 (2020) 78–105

Salim 3,d 1Institute of Nano Electronic Engineering (INEE), University Malaysia Perlis (UniMAP), Perlis, Malaysia 2Laser and Optoelectronic Department, University of Technology, Baghdad, Iraq 3Laser Science Branch, University of Technology, Baghdad, Iraq amokaram_76@yahoo.com, byaldouri@yahoo.com, cuda@unimap.edu.my, devan_tarq@yahoo.com Keywords: Lithium niobate, Pechini method, X-ray Diffraction, sol-gel Abstract.
Varelaa, Influence of oxygen atmosphere on crystallization and properties of LiNbO3 thin films, Journal of the European Ceramic Society. 24 (2004) 1607 - 1613
Qiang, Preparation and characterization of LiNbO3 thin films derived from metal carboxylate gels, Key Engineering Materials. 336-338 (2007) 213-216
Sarma, X-ray peak broadening analysis of ZnO nanoparticles derived by precipitation method, International Journal of Scientific and Research Publications. 4 (2014) 1-7
Varela, Effect of magnesium on structure and properties of LiNbO3 prepared from polymeric precursors, Ceramics International. 28 (2002) 265 - 270

Fusion Engineering and Design. 2007, 82:2035-2039
Research on low cavitation in water hydraulic two-stage throttle poppet valve [J], Journal of Process Mechanical Engineering, Proc IMechE, Part E, 2006, 220 (3):167-179
Journal of Process Mechanical Engineering, ProC ImechE, 2006, 220(3):167-179
Chinese Journal of Mechanical Engineering. 2010, 23(4): 418-427
Chinese Journal of Mechanical Engineering, 2009, 45(6):67-72.