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Introduction Many heavy metals are indispensable materials for industrial production, scientific research and national defense construction, which play an important role in the industrial production.
Materials and methods The polyaniline with good performance was synthesized according to the published procedure[8-13]. the maturity route of dianhydride chloride has been studied in our laboratory. 0.32 g polyaniline, 30 ml pyridine, 34ml dianhydride chloride and 50 ml benzene were mixed under stirring at 0℃ for 2 h, then warmed to room temperature and reacted for 1h.
Chinese Journal of Inorganic Chemistry, 2000,16(3): 265-269(In Chinese)
Science & Technology Information, 2008, 18:391-392(In Chinese)
Journal of Nan Jing Normal university, 2009, 19(2): 41-47(In Chinese)

As an alternative to these methods, recent proposals have emerged on the use of modern lightweight high-strength materials to reinforce reinforced concrete constructions.
The main difficulty is the different deformability of these materials.
, P Koszelnik and P Mesaros (Cham:Springer) p 195 [10] Torabian A and Mostofinejad D 2017, ACI Structural Journal 114 861-73 [11] Pham T M, Doan L V and Hadi M N S 2013 Constr.
Mater. 49 490-9 [12] Hadi M N S 2010, Australian Journal of Structural Engineering 10 169- 78 [13] Blikharskyy Z, Vashkevych R, P Vegera and Blikharskyy Y 2020 Advances in Resource-saving Technologies and Materials in Civil and Environmental Engineering in Proceedings of CEE 2019 – 2020, Lecture Notes in Civil Engineering Vol 47, ed Z Blikharskyy, P Koszelnik and P Mesaros (Cham:Springer) p 17 [14] Blikharskyy Z, Khmil R and Vegera P 2017 Shear strength of reinforced concrete beams strengthened by P.B.O. fiber mesh under loading Matec Web of Conferences 116 10.1051/matecconf/201711602006 [15] Selejdak J, Blikharskyy Y, Khmil R and Blikharskyy Z 2020 Advances in Resource-saving Technologies and Materials in Civil and Environmental Engineering in Proceedings of CEE 2019 – 2020, Lecture Notes in Civil Engineering Vol 47, ed Z Blikharskyy, P Koszelnik and P Mesaros (Cham:Springer) p 410 [16] Blikharskyy Z, Vegera P, Vashkevych R and Shnal
T 2018 Fracture toughness of RC beams on the shear, strengthening by FRCM system Matec Web of Conferences 183 10.1051/matecconf/201818302009 [17] Benzaid R and Mesbah H A 2013, Structural Engineering and Mechanics 46 111-135 [18] Blikharskyy Y, Khmil R and Blikharskyy Z 2018 Research of RC columns strengthened by carbon FRP under loading Matec Web of Conferences 174 10.1051/matecconf/201817404017 [19] Gajdosova K and Bilcik J 2013, Journal of Composites for Construction 17 239-48 [20] Olivova K and Bilcik J 2009, Slovak Journal of Civil Engineering 17 1-9 [21] Zhang Q, Mol’kov Y V, Sobko Y M, Blikhars’kyi Y Z and Khmil R E 2015, Materials Science 50 824-9

International Journal of Computer Integrated Manufacturing 26 (7), 596–615
Journal of Machine Engineering 16 (2), 5–17
Journal of Manufacturing Processes 37, 150–158
Materials Science and Engineering: A 598, 327–337
Journal of Alloys and Compounds 541, 177–185

Experimental procedure Materials used and specimen's preparation.
Advanced Engineering Materials, 2000; 2: 745-748
Journal of Materials Research, 2001; 16: 1471-1477
Materials design in the performance of all-ceramic crowns.
Annual Review Material Science, 1997; 27: 443- 468

Material and methods Characteristics of the Lurgi coal gasification wastewater.
He, Towards sustainable wastewater treatment by using microbial fuel cells-centered technologies, Energy & Environmental Science, 7 (2014) 911-924
Moreno-Piraján, Effect of the pH in the adsorption and in the immersion enthalpy of monohydroxylated phenols from aqueous solutions on activated carbons, Journal of Hazardous Materials, 169 (2009) 291-296
Refaat, Removal of catechol from aqueous solutions by adsorption onto organophilic-bentonite, Journal of Hazardous Materials, 150 (2008) 765-773
Shen, Water and Wastewater Monitoring and Analysis Method 4rd Ed., China Environmental Science Press Beijing, ( 2002) 156-158.

Qianshan road 185th, University of science and technology Liaoning, Anshan, Liaoning, China.
The Deformation Rule of the Cooled U75V Heavy Rail Caused by the Different Heat Transfer Coefficient.Advanced Materials Research,2011,Vol.299-300:1005-1011.
The Numerical Simulation of Horizontal Straightening for 60 kg/m Heavy Rail with Original Curvature, Applied Mechanics and Materials,Vol.16-19(2009) :44-48.
Journal of Plasticity Engineering, 2011, 18(3): 40-41.
International Journal of Mechanical Sciences, 2005, 47(12):1874-1884

Lobanov, The effect of thermomechanical processing parameters on the microstructure of hot-rolled tubular steel plate products, Collection of materials of the international symposium "Advanced Materials and Technologies". - Brest, (2019) 516-517
Bhadeshia, Bainite transformation kinetics Part 1 Modified model, Materials Science and Technology, 8 (1992) 985–993
Part 1: the Model, Materials Transactions, 47 (2006) 2465–2472
Tszeng, Autocatalysis In Bainite Transformations, Materials Science And Engineering A, 293 (2000) 185–190
[15] C.Liu, X.Di, C.Chen, X.Guo, Z.Xue, A bainite transformation kinetics model and its application to X70 pipeline steel, Journal of Materials Science. 50 (2015) 5079–5090

Stainless steels are materials that have chromium as a major alloying element.
De, Effect of cold work on low-temperature sensitization behavior of austenetic stainless steels, Journal of Nuclear Materials, 334(2004), 115-132
Murr, A Comparison of sensitization kinetics in 304 and 316 stainless steels, Journal of Materials Science, 35 (2000) 3181-3188
Sidhom, Double Loop Electrochemical Potentiokinetic Reactivation Test Optimization in Checking of Duplex Stainless Steel Intergranular Corrosion Susceptibility, Metallurgical and Materials Transactions A, 35 (2004) 1-15
Lee, Modification of Electrochemical Potentiokinetic Reactivation Test for Detecting the Degree of Sensitization of Alloy 600, Journal of the Corrosion Science Society of Korea, 22(3) (1993) 165-175

Materials and Experimental Procedures The received testing material is cast nickel based superalloy, grade Inconel 738, a gas turbine blade material after 50000 hours service.
Homkrajai, Gamma prime phase stability after long-term thermal exposure in cast nickel based superalloy, IN-738, Chiang Mai Journal of Sciences 36 (2009) 312-319
Chuankrerkkul, Microstructural restoration by HIP and heat treatment processes in cast nickel based superalloy, IN-738, Chiang Mai Journal of Sciences 36 (2009) 287-295
Panich, Gamma prime particle coarsening behavior at elevated temperatures in cast nickel-based superalloy, GTD-111 EA, High Temperature Materials and Processes 27 (2008) 41-49
Pongsugitwat, New nickel based superalloys development by vacuum arc melting process based on aluminium addition of GTD111, Advanced Materials Research 1025-1026 (2014) 455-460.

However, studies were almost focused on silicon nitride materials with low porosity (<50%) and high strength, and few research was reported about silicon nitride materials with low dielectric(ε<3, tgδ<0.01), high porosity (>50%) and high strength used as core layer of the broadband radome.
In this work, low dielectric porous silicon nitride ceramic radome materials with both high porosity and high strength were prepared by adding pore-forming agent through partial sintering technique.
XRD of Si3N4 powder as initial raw materials Results and Discussion Density and porosity of porous silicon nitride with different PMMA content was shown in figure 2.
Acknowledgement This research was financially supported by the Natural Science Foundation of Shandong Province (Project No.
Hampshire, Characterisation of Porous Silicon Nitride Materials Produced with Starch, J.