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It is especially serious for hard- brittle functional materials, such as crystal, glass and ceramics, due to their special characteristics.
For different materials, appropriate recipes should be selected.
IEEE TRANSACTIONS ON PLASMA SCIENCE.
Journal of Crystal Growth. 2005, 275: 39-50
Analytical Chemistry Handbook, translated by Chang Wenbao, Science Press, China, 2003

Project Overview The Yili Mineral materials inclined was used to upgrade the waste rock, materials, transportation of personnel, ventilation during the boring period, and large-scale equipment was used to transport the Lane.
Material well using a four brackets, return air shaft uses 4 to 5 stents according to the surrounding rock stability.
Acknowledgements This work is financially supported by the National Natural Science Foundation of China (51134025) and Fundamental Research Funds for the Central Universities (2009QL04).
Beijing: Science Press. 2002
Journal of Chongqing Construction Engineering College. 1989.11 (1):41-47

Rubberized portland cement concrete is concrete as base material, uniformly mixing various non-continuous rubber powder and rubber particles and the formation of cement based composite materials.
Frame system of the main building structure can use the wall of the new energy efficient building materials in this region which was warm in winter and hot in summer.
Research and application of concrete pavement materials that has modified have achieved good results at home and abroad.
At present, rubberized portland cement concrete is applied as materials of the surface layer of the toughness, expansion joints and elastic material that repairs expansion joints crack in the project of Shanghai Outer Ring Road, Inner Ring Viaduct.
Review of the new flexible concrete .Tianjin Construction Science and Technology, 2004, (2) [2]Review of rubberized portland cement concrete in highway engineering.Highway.2008.4(4) [3]Applications and research profiles of rubberized portland cement concrete.Rubber Industry, 2007, vol 54 [4] An overview of the study on rubcrete, Journal of Chongqing Jianzhu Univer sity,2008. 4，(2) [5] Experiment analys is and applicat ion of rubberized portland cement concrete.Concrete,2006 (7) [6] The research progress of Portland cement concrete containing crumb rubber.

Series: Materials Science and Engineering. 179 (2017) 012009
Syrovatko, Features of structurization of composite materials of the solution-and-diffusion type, Metallofiz.
Balalayeva, Effect of particular combinations of quenching, tempering and carburization on abrasive wear of low-carbon manganese steels with metastable austenite, Materials Science Forum. 945 MSF (2019) 574-578
Dzherenova, Application of the Q-n-P-treatment for increasing the wear resistance of low-alloy steel with 0.75% C, Material Science. 53 (2017) 67-75
Halfa, Simulation of structure formation in the Fe–C–Cr–Ni–Si surfacing materials, Eastern-European Journal of Enterprise Technologies. 2 (2018) 33-38

Introduction At present, organic polymeric materials are considered the most promising low-dimensional systems.
Materials Today: Proceedings 4 (2017) 6194–6199
Hu, Positive and negative magnetic field effects in organic semiconducting materials.
Stepanov Mathematic modeling of the method of measurement relative dielectric permeability, IOP Conference Series: Materials Science and Engineering 363(1) (2018) 012006, https://doi.org/10.1088/1757-899X/363/1/012006 [9] A.I.
Sergeyev et al., Researches of air and fuel rate influence on oxygen level in emissions of new type medium power coal boiler, IOP Conference Series: Materials Science and Engineering 457(1) (2018) 0120237, https://doi.org/10.1088/1757-899X/457/1/012023 [13] T.

It is considered the material selection is not appropriate, which means the two materials do not mate each other, particularly, the high temperature resistant performance of stationary ring is relatively weak.
The improvement measures 3.1 The replacement of mechanical seal materials improving the sealing performance In order to prevent the thermal crack occurs on friction pairs, material selection is very important.
Materials with good thermal conductivity, high strength, small linear expansion coefficient, and low elastic modulus are favorable for preventing cracking.
The combination of rotary and stationary rings’ materials can have a big impact on sealing performance.
Therefore, the original combination of "tungsten carbide + hard carbon graphite" can be changed to fine grain graphite and silicon carbide materials to improve its performance.

Experiment The main materials and instrument of the experiment.
The main materials.
Experimental materials include a kinds of superplasticizer: polycarboxylic superplasticizer（PC）the origin of raw materials of various tests are shown in Table 2.1.
Ma, Journal of wuhan university of science and technology, Vol. 25(1) (2003), p.26.
Yu: Materials Letters Vol. 61 (2007), p. 872.

However, some studies indicated that security educational materials are not sufficient [3].
The primary reason is that users usually have low motivation of studying documental materials.
Audio Audio stream on line or download from multimedia database Video Video stream on line or download from multimedia database Harmless Other harmless materials such as pictures, news pages, advertisement, etc.
“Don't be a phish: steps in user education”, in Proceedings of the 11th Annual SIGCSE Conference on Innovation and Technology in Computer Science Education, 2006
International Journal of Engineering Education, 22(no. 5):1043-1052, 2006

Research on SO2 Controlled Release Packaging on the Preservation Performance of ‘Kyoho’ Grapes LIU Peng1, a, LI Dongli1, b, XU Wencai1, 2, c and FU Yabo1, 2, d 1Beijing Key Laboratory of Printing & Packaging Materials and Technology, Beijing Institute of Graphic Communication, Beijing 102600, China 2Institute of Packaging and Printing Engineering, Tianjin University of Science and Technology, Tianjin 300222, China aliupeng890311@163.com, blidongli@bigc.edu.cn, cxuwencai@bigc.edu.cn(Corresponding author), dfuyabo@126.com Keywords: Grape; SO2; 1-MCP; Preservation; Shelf-life Abstract.
Materials and Instruments Materials.
Acknowledgements This work was funded by National Science and Technology Support Program (2012BAF13B05).
LWT-Food science and technology, 2006, 39(6): 584-590
Australian Journal of Experimental Agriculture, 1992, 32:389-393

The main reason for which is that,according to the dissolve-precipitation theory and the crystal precipitation condition, various kinds of scaling materials from insoluble salts formed ,however as the solution condition could not meet the requirement of crystal precipitation , the amount of is precipitation is quite small,mixed liquid stays clear with no obvious variation of turbidity.So it can be judged from the appearance, treated water and formation water show excellent compatibility. 3.3 Result of analysis on scaling-formation ions and scaling materials Analysis on scaling-formation ions and scaling materials gives a good quantitative description of ion constitution and scaling material production in mixed liquid after chemical reaction.As Mg2+ concentration is little when compared with the concentration of Ca2+, it is not studied in this experiment.
Acknowledgements This study is supported by the Science & Technology Innovation Project of Shaanxi Province (Grant No. 2011JY002) and Science and Technology Co-ordination Projects Foundation of Shaanxi (Grant No. 2012KTCQ-03-08).
Oil field fracturing wastewater Fenton oxidation - flocculation reinjection treatment research [J], Xian university of petroleum journal, 2009(05)
Shaanxi science and technology press, 1995.95~102 [5] SY/T0600-199《Oil field water scaling tendency prediction rules》[S].