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PREPARATION OF SULFATED ZIRCONIA USING MODIFIED SOL GEL METHOD Anis Kristiani, Kiky C.Sembiring, Fauzan Aulia, Joddy Arya Laksmono, Silvester Tursiloadi, Haznan Abimanyu Research Centre for Chemistry – Indonesian Institute of Sciences Kawasan PUSPIPTEK Serpong Tangerang Selatan 15314 Phone : (021) 7560929 ; Fax : (021) 7560549 Email : anis.kristiani87@gmail.com Keywords: catalyst, sol gel method, sulfated zirconia, surfactant, SFE Abstract.
Alkoxy originated sulfated zirconia was reported to have superior properties compared to the catalyst derived from other precursors, since it retains the preferable tetragonal structure even at higher calcination temperatures [2].
Three crystal structures of ZrO2, i.e., tetragonal, monoclinic, and cubic phases have been reported.

Shown as Fig. 2~Fig. 6, along with the increasing amount that TiO2 was added, the mineral phrase structure and the crystallization rate both changed obviously.
It is shown in Fig. 6c that under the temperature of 1300, the structure of the fluxes remained the same, with more than 98% of the fluxes being glass phase and only approx. 1% of perovskite, whose dimension increased a bit, with maximum width of the crystal being approx. 11μm, and length being approx. 75μm.
B: Study on Some Physical Chemistry Problems of Blast Furnace Slag-Bearing Titania [D], chongqing:chongqing university, 2003

Yves2,e 1 School of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou, Gansu 730070, China 2 School of Environmental & Municipal Engineering, Lanzhou Jiaotong University, Lanzhou 730070, PR China azhangcx21@126.com, bjiangyf7712@126.com, cmzhou8367@sina.com dhuxf0122@126.com,ejoady9@yahoo.fr Keywords: Biochar, Pyrolysis, Adsorption, Thermodynamics, Sodium pentachlorophenate.
The high surface areas of BC-600 (715 m2/g) suggest that the biochar samples possess some fine-pore structures.
The high surface areas of BC-600 (715 m2/g) suggest that the biochar samples possess some fine-pore structures.

Lower salt section is rhythm interbedded by brown and smoke gray halite, medium-bedded, medium - coarse grain structure, translucent, with thin mudstone and anhydrite; middle salt section dominated by brown rock salt, with small amount of smoke gray rock salt, medium - fine grain structure, sandwiched multilayer mudstone laminate; upper salt section mainly is smoky gray rock salt, medium-bedded.
Lake chemistry geology and physics (Geology Press, BeiJing 1989)

It helps the welded metal to get solidify by making fine grained structure, furthermore it increases fracture strength at a rate equal to or greater than the crack’s flow strength [3].
Electrode-1 is used to make a deposit having chemistry almost similar to base metal, no special alloy addition is there.
With addition of alloy nickel, the welded joint microstructure is transformed into refined grain structure with less than or equal to 6.24% Ni, whereas grains need to grow more to be restore ferrite, when larger amount of nickel as 17.75% is added. 2.

The alignment collar includes a which sets the depth of the probe insid the hole; -the indication which is registred indicates of the adiacent probe material and so represents the geometry, chemistry and hardness of the threadded hole; -the thread ckecking is not indangered by the lubricants; -the positioning accuracy of the probes is between +/-0,127mm; -the system operates in real time, so there is no delay between the time the probe is inserted and the time the inspection is being done; -the used system presents control sensors, each coresponds a threadded hole verified.
In conclusion, this paper presents, briefly, the contributions of the authors regarding the optimisation of the structure, design and execution of a specific automatised assembly/test line; elements of structure, driving and control of the work parts of this characteristic line which works to get the subsystem-carcass.

Numerical Simulation of Insulation Layer Ablation in Solid Rocket Motor Based on Fluent Jian LI a, Mei ZHANG b*, Jiang-tao ZHANG c Department of Engineering Structure and Mechanics, School of Science, Wuhan University of Technology, Hubei Wuhan 430070, China a lijian459462452@163.com, b zhangmei@whut.edu.cn, c zhjiangtao@whut.edu.cn *Corresponding author Key words: Solid rocket motor; Insulation layer; Ablation; Dynamic mesh; Fluent Abstract.
According to the theory of thermo-chemistry ablation, the main chemical reactions on the inner wall are C reacting with the CO2 and H2O , as shown in table 1[6].
Li, Study on solid ramjet insulator ablation & its relation to ramjet structure, Graduate School of National University of Defense Technology, (2011)

When the silicic acid polymerized, three-dimensional structure could be loops and nets.
The structure led to strong adsorption bridging activity.
Pure and Applied Chemistry, 2011 83 (12) 2229–2259

It is concluded that UV treatment of wood materials provides surface cleaning, a change in the surface structure, as well as a change in the surface chemical composition.
Singh, Reactivity, chemical structure, and molecular mobility of urea–formaldehyde adhesives synthesized under different conditions using FTIR and solid-state 13C CP/MAS NMR spectroscopy, J.
Reinprecht, The impact of UV radiation on the change of colour and composition of the surface of lime wood treated with a CO2 laser, Journal of Photochemistry and Photobiology A: Chemistry. 322 (2016) 60-66

Existing researches on the absorbing properties of cement-based materials show that adding nano-materials can improve the performance of wave absorbing, 10-15mm thick samples made from cement mixed with nano-TiO2 powder were found very effective within 2-18GHz spectrum.[6-9] In this paper, the electromagnetic wave absorption performance of modified cement base material were studied, this research has important academic value in the development of large span structures’ camouflage technology, and improving stealth properties of concrete structures, etc.
[8] Zhang Haijun,Liu Zhichao,Ma Chenliang,etc.Preparation and microwave properties of Co- and Ti-doped barium ferrite by citrate sol-gel process[J].Materials Chemistry and Physics,2003,80129-134