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Experimental section Materials.
(2) Such dispersants have the advantages of tiny additives requirements and cheap materials, which bring ease to industrialization.
Acknowledgements This work was financially supported by the National Natural Science Foundation of China (21176148), Shaanxi Natural Science Foundation (2009JZ002) and Industrialization Development Project of Shaanxi Education Department (2010JC03).
[2] Fengqi Li, Shuquan Zhu: Journal of China Coal Society, 2000, 25(4): 439-442.
[4] Xiaoyu Gu: Coal Science and Technology, 2009, 1(37): 111-113.

Introduction Alumina ceramic has attracted much attention as potential materials for high temperature applications because of their advantages such as good heat and wear resistance, high mechanical strength, and low production cost.
In terms of composite materials, the difference in coefficients of thermal expansion (CTE) between phases of the composite at high temperatures could cause mismatch stresses that propagate slow crack growth at cavities.
Ishizaki, Advance in Technology of Materials and Materials Processing Journal 6 (2004) 240-243
Francis Rose, Progress in Materials Science 47 (2002) 463-557
Bradt (Eds.), Deformation of Ceramic Materials II, Plenum Press, New York, 1984, pp. 487-505.

Introduction In the manufacturing process of composite materials residual stresses may arise inside of the components.
For the residual stress estimation in the outer layer of engineering materials the hole-drilling method is a well-established technique [1] and also a promising technique for composite materials [2].
The relaxation behavior of the different materials was assessed.
Akbarzadeh, Calibration Coefficients for Residual Stress Measurement in Composite Materials Using Finite Element Method, American J. of Engineering and Applied Sciences 5(1) (2012) 25-28 [3] J.C.
Lu, Determination of Residual Stress in Composite Laminates Using the Incremental Hole-Drilling Method., Journal of Composite Materials 37(9) (2003) 831-844 [5] A.

Acknowledgment The authors acknowledge financial support of a grant in aid for science research from the Ministry of Education, Culture, Sports, Science and Technology of Japan (No. 21560081).
Daymond: Material Science & Engineer- ing, A259 (1999), p. 17
Johansson: Material Science & Engineering, A334 (2002), p. 215
Ledbetter: British Journal of NDT, Vol. 23 (1981), p. 286
Alers: Journal of Physics and Chemistry of Solids, Vol. 35 (1964), p. 327.

Two of them are different in mode of action and in the destruction of a materials.
But for the concrete materials, the two roles is similar: concrete is a kind of heterogeneous brittle material.
Appling materials science, mechanics and other knowledge, we should combine with the study of sub micro level and macro level.
The Significance of Critical Degree of Saturation at Freezing of Pore and Brittle Materials.
Journal of Shanghai Institute of Building Materials，1993（2）：112~123

At present, conductive materials applied for the printing process most commonly investigated are typically colloidal suspension with gold, silver, graphene, and copper nanoparticles.
Hérold: Journal of Electronic Materials, Vol. 48(6) (2019), p. 3248-3450
Shi: APL Materials, Vol. 8(12) (2020), p.120705
Sun: International Journal of Electrochemical Science, (2016), pp. 8520–8529
Akop: International Journal of Nanoelectronics and Materials, Vol. 14 (2021), p. 16

In this study, screening antagonistic actinomycetes on pepper anthrancnose from soil will provide good experiment conditions for biological control of pepper anthrancnose Materials and Methods Soil sample The 22 soil samples were collected from the orchard, vegetable garden, arboretum, and brought back to the laboratory for treatment.
Beijing: Science press, 1990, 92-95
Journal ofAntibiotics, 1999, 52(1) : 61-64
Northwest university of agriculture and forestry journal.2010
Jiangxi agricultural journal. 2010,22(12): 87 -90.

Advances in Science and Technology of Water Resources, 17(1), 29-33
Chinese Journal of Rock Mechanical and Engineering, 23(13), 2235-2242
Chinese Journal of Rock Mechanical and Engineering, 21(1), 143-147
Chinese Journal of Underground Space and Engineering, 1(1),1157-1162
Chinese Journal of Rock Mechanical and Engineering, 25(7),1377-1385.

Its purpose is to make the impact on the environment (negative effects) the smallest and most efficient resources during the whole process of product formation from materials acquisition, processing, packaging, storage and transportation, with using the scrapped deal [3].
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