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Hexagonal system ferrite materials are widely used in ceramic permanent magnetic materials, high-frequency magnetic head materials, and high-frequency soft magnetic materials due to their excellent electromagnetic properties.
References [1] Han Zhiquan, in: Developments of Ultrahigh Frequency Soft HexagonalFerrite and Composite Ferrite Materials, Journal of Magnetic Materials and Devices (No. 3,2010 )
[2] Tang Yingming, Jia Lijun, Zhang Huaiwu, Yin Shuiming and Li Tao, in: Application and Research Status of Z-type Hexaferrites Used in UHF Band, Journal of Magnetic Materials and Devices (No. 6, 2010)
[3] Feng Zekun, Huang Aiping, Xu Dandan, Sheng Jinping, in: Ferroxplana Co_2Z Hexagonal Ferrites Materials for Applications at Quasi-microwave Band, Journal of Magnetic Materials and Devices, (No. 6, 2008)
[4] Hao Sikun, Li Wei, Meng Weimin, Bai Jianmin, Yang Zheng and Wei Fulin, “Magnetic properties of Co_2Z type ferrite thin films, Journal of Magnetic Materials and Devices,(No. 3, 2011)

There are some people proposed TiO2 photocatalysis oxidation technology in wastewater treatment may play an important role, so it has been a hot issue in the field of science and technology research. 1The present situation of the applications of TiO2 in the wastewater treatment The study which process wastewater and improve the environment by the photocatalytic properties of TiO2 has become a hot issue in the field of science and technology research.
Once researchers prepared nano-sized TiO2 semiconductor photocatalytic materials to study the photocatalytic treatment of oily wastewater treatment effect, The results show that nano-sized TiO2 with high activity of photocatalytic degradation of oil.
Researchers photocatalytic degradation under UV light irradiation of crude oil with coal ash in the floating ball as the carrier, using butyl titanate as raw materials, the preparation of a load photocatalytic activity of TiO2 powders with nanoscale floating load type catalyst , the results showed that the degradation: Floating type load TiO2 photocatalyst can floating on the surface of the water and oil pollutants fully contact, can make the effective degradation of pollutants for simple non-toxic substances. 2.3 Pharmaceutical wastewater treatment With the continuous development of medicine pharmacy has brought people more of the convenience, but to increase the difficulty of pharmaceutical waste water treatment.
Attapulgite load of azo dyes and TiO2 photocatalytic decolorization of textile wastewater[J].2001 [2] Fu Q.Shiang, Progress of applied research on TiO2 photocatalysis-membrane separation coupling technology in water and wastewater treatments, Chinese Science Bulletin,2010-05-10 [3]Ai Dawei,Hu Junsheng, The ninth shenyang science academic annual meeting,2012-10 [4]Chen Meilan.
Chinese Journal of Catalysis.2000 [9]Xia Jinhong.

Although some libraries have a very large collection of books, the inaccurate grasping of the university teachers and students’ demands for materials document has led that the introduction of literature can’t solve readers’ problems and the materials that can’t be used and are rarely used have caused the waste of resources; fourth, the insufficient management of libraries does not protect the collection of books well.
Modern libraries should achieve the literature information sharing with multi-level, multi-channel and multi-dimension, actively control the information demands of readers, and take various measures and approaches to meet readers’ needs of book materials and information resources to the maximum extent, improve the utilization rate of books, and fully play the biggest benefits of books.
Journal of Hunan Economic Management College. 2005(02)
Industrial & Science Tribune. 2006(11)
Journal of Yunnan Finance and Trade Institute. 2000(S1)

For materials whose static strength is small or zero, e.g., sand or water, the depth of penetration is no larger than 100 times the size.
Journal of Physics and Thermophysics, 2002, V.75, #3, P. 753-770
Proceedings of USSR Academy of Sciences, Mechanics, 1987, V. 292, # 6, P.1319-1322
Engineering Physics, National Academy of Science, Belarus, Minsk, 2002, V. 75, #4
Journal of South-Ural State University, Mathematics, Physics, Chemistry Series, 2006, Is.7, P.157-163 [6] 7.

Computational Materials Science, 2010, 49: S239–S241 ].
Journal of Materials Science: Materials in Electronics, 2011, 22 (3): 315-322. ].
Recently, CNTs/Cu composite became a kind of good functional materials with high application potential.
Materials Science and Engineering: A, 2006, 430(1): 27-33. ].
Progress in materials science, 2001, 46 (1): 1-184. ], plasma atomization[[] Tsantrizos P G, Entezarian M.

“Selection of equipment for machining processing of parts using NX and TEAMCENTER programs”, Paper presented at the IOP Conference Series: Materials Science and Engineering, 2016, 134(1) doi:10.1088/1757-899X/134/1/012041 [9] E.
(2020) IOP Conference Series: Materials Science and Engineering, 2020, 969(1), 012069 DOI:10.1088/1757-899X/969/1/012069 [18] Pankratov, D.L., Gavariev, R.V.
“To the question of automation of the injection molding process”, IOP Conference Series: Materials Science and Engineering, 2020, 915(1), 012043 doi:10.1088/1757-899X/915/1/012043 [19] Gavariev, R.V., Gavarieva, K.N., Soldatkina, E.N.
“Features of design of chill molds for casting of non-ferrous metal”. (2020) IOP Conference Series: Materials Science and Engineering, 2020, 969(1), 012068 doi:10.1088/1757-899X/969/1/012068 [20] G.
IOP Conference Series: Materials Science and Engineering, 2020, 969(1), 012021DOI: 10.1088/1757-899X/969/1/012021 [24] I.A.

Graphene oxide (GO), a widely used graphene derivatives, has been attracted considerable attentions during the past three years for the production of graphene based composite materials[7-9].
Therefore, it is an efficient filler for the enhancement of electrical, mechanical and thermal properties of composite materials.
[6] K.H.Hong and G.Sun: Journal of Applied Polymer Science Vol. 116(2010), p. 2418-2424
[7] Z.Liu, X.Zhou and Y.Qian: Advanced Materials Vol. 22(2010), p. 1963-1966
[10] J.J.Liang, Y.Huang, L.Zhang et al: Advanced Functional Materials Vol. 19(2009), p. 2297-2302

With the development of science and technology and the improvement of people's living standard, Natural gas has been widely applied to daily life.
Filling wall generated temperature cracks and shrinkage cracks, because infilled wall materials and reinforced concrete frame materials with different coefficients of linear expansion, the majority belongs to the old cracks.
（Disasters，China 1998） [2] Xiao Xie, Jia Pang, Wei Fei, Jing Hui zhao Study on natural gas explosion effects on buildings (Sichuan Building Science, China 2007) [3] Han Yong li, Chen Long zhu.
Venting of deflagrations: hydrocarbon2airand hydrogen2air systems [J] Journal of Loss Prevention in the Process Indust ries, 2000, 13: 397～409

This process makes them sustainable green concrete materials that are eco-friendly.
The sieve analysis results of the materials used (sand, RHA, CCA) are presented in Figure 1.
(iii) The utilization of rice husk and corn cob ashes by industries as building materials should be encouraged as this could help contribute to the use of locally accessible materials in infrastructural development.
Fayyadh, "Rice husk ash concrete: the effect of RHA average particle size on mechanical properties and drying shrinkage," Australian Journal of Basic and Applied Sciences, vol. 3, no. 3, pp. 1616-1622, 2009
Chindaprasirt, "Strength and chloride resistance of blended Portland cement mortar containing palm oil fuel ash and fly ash," International Journal of Minerals, Metallurgy and Materials, vol. 16, no. 4, pp. 475-481, 2009/08/01/ 2009, doi: https://doi.org/10.1016/S1674-4799(09)60083-2

Introduction The raw material blending exists popularly in process industries, which is a key process to guarantee product quality by mixing various raw materials with an appropriate proportioning.
However, there exists serious conflict between these index parameters due to a wide range of raw materials in metallurgical blending processes.
And the change of a kind of raw material often affect multiple index parameters so that it is difficulty to obtain the optimal proportioning for all kinds of raw materials to make all indices meet their requirements.
Woo: submitted to Journal of Process Control(2000) [2] J.
Lei: submitted to Journal of Chongqing University: Natural Science Edition(2002) [3] W.