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Reactivity of brick powder in lime mortars Eva Navrátilová1,a, Pavla Rovnaníková2,b 1, 2 Brno University of Technology, Faculty of Civil Engineering, Institute of Chemistry, Veveří 331/95, 602 00 Brno, Czech Republic anavratilova.e@fce.vutbr.cz, brovnanikova.p@fce.vutbr.cz Keywords: brick powder, pozzolanic activity, lime mortars Abstract.
A brick body which is prepared by firing clays at temperatures from 600 to 900 ° C becomes capable of pozzolanic activity by changing its structure.
CZ.1.05/2.1.00/03.0097, as an activity of the regional Centre AdMaS "Advanced Materials, Structures and Technologies".

After multi-step forging, a duplex microstructure consisting of fine lamellar structure (about 30μm) and fine equiaxed γ grains (about 20~30μm) was obtained.
Liu, Recent advances in ordered intermetallics, Materials Chemistry and Physics. 42 (1995) 77-86
Chen, et al., Formation of stress-induced 9R structure in a hot-deformed Ti-45Al-10Nb alloy, Scripta Materialia. 37 (1997) 135-140.

All the diffraction peaks can be indexed with α–NaFeO2 type structure based on the hexagonal crystal system (R-3m space group).
Fig. 1 XRD patterns of samples (a) L (b) L12 (c) L24 and enlargement of the XRD patterns at 30° and 50° for (d) L (e) L12 (f) L24 Clear peak splittings of the (006)/(012) and the (008)/(110) doublets in L and L24 samples were indication of highly layered structure [5].
Chen, Preparation Preparation and characterization of lithium nickel cobalt oxide powders via a wet chemistry processing, Mater.

When two or more composite board material, also need to add raw material proportioning, slab structure, analysing and sizing amount proportion factor as the main factor, etc.
Chemistry and industry of forest products,2005,25(1):69~72
Comparison of ammoniated and microbial microstructure of straw structure[J].

Matsuhisa, Effects of the chemical structure on the properties of polycarboxylate-type superplasticizer, Cement and concrete research, 30(2000) 197-207
Hanehara, Influence of kind and added timing of organic admixture on the composition, structure and property of fresh cement paste, Cement and Concrete Research, 25(1995)353-364
Romer, Influence of solution chemistry on the hydration of polished clinker surfaces—a study of different types of polycarboxylic acid-based admixtures, Cement and Concrete Research, 32(2002)187-198

Various crystalline forms of tungsten oxides can be prepared by thermal evaporation of WO3 powder [3,4], by Radio-Frequency-sputtering from metallic W [5] or WO3 targets [6] in Ar/O2 atmosphere, by chemical vapor deposition [7] and by wet chemistry such as the sol-gel process [8].
The sweeping change in phase from orthorhombic to hexagonal and in the structure (decreasing of crystallites size from ~ 300 nm to ~ 50 nm) was obtained after heat treatment at 330°C 90 min. in air.
Weiss: Materials Structure, Bulletin of the Czech and Slovak Crystallographic Association, Vol. 6 (2) (1999), p. 135 [14] Information on http://www.mercorp.com [15] A.

The structures of the dip-coated Bi-2223 thick films were examined by XRD and SEM measurement.
It is shown that the sample is a sandwich like structure, which is composed of Bi-2212 covering, Bi-2223 main film inter-layer and Ag substrate.
Sucha: Handbook of Chemical Equilibria in Analytical Chemistry (1985) (New York: Wiley)

The structure and properties of such a composite material are presented and discussed.
Sample number Elements detected Apparent density ρa [ g/cm 3] Open porosity P [%] Absorbability N [%] 1 Ca, Si, K, P, small Fe 1.985 12.56 6.32 2 Ca, Si, K, P 1.755 22.90 13.02 3 Ca, Si, K, P, Fe* 2.291 27.65 15.35 2 Ca, Si, K, P, Fe* 1.916 10.70 5.10 *Fe present in a form of Fe3O4 The XRD pattern shows complex crystalline structure in which the major phase apparently appears to be calcium phosphate oxide - Ca10(PO4)6O-Y, (Fig. 2). 0 500 1000 1500 2000 2500 20 25 30 35 40 45 50 2 Theta [deg] Intensity [a.u.]
Analytical Chemistry News & Features, May 1 (1998), p. 322

The percentage of saccharides found in the degradation solutions (25%) is almost half from the mass of starch in the material structure (42%).
For the time used in the experiments, only part of amorphous of SEVA-C blend was degraded to the solution, the remainder stayed embedded in the network structure.
Doane: Starch chemistry and technology eds R.L.

Observation of β-CD-menthol inclusion compound A microscope was used to observe the structure characteristics of β-CD, menthol and inclusion compound of β-CD-menthol.
a b c Fig. 6 The microscope diagram Fig. 6a showed the cavity structure characteristics of β-CD.
[2] L.H.Tong, Dextrin chemistry – foundation and applying, Science and technology publication, Beijing, 2001