Glass sizings, composition

Dependence of the fracture strength of the YMgSiAION glass-SiC composites (28 vol% SiC) on the SiC particle size and the surface finish (after Baron eta ., 2000). 

Figure 5.13 DTA and DTG traces, simultaneously measured, of the base glass batch composition of various particle sizes.

Numerous studies have been made of the mechanical properties of fibrous composites these include recently published papers on impact properties by Izod (1,2, 3,4) and Charpy (5,6) and drop weight (7) tests. We reported the Charpy impact fracture behavior of various glass-polyester composites regarding the effects of temperature (8,9,10), specimen size (8), and fiber orientation (10). This paper describes the effects of the tough-brittle transition in the impact behavior of glass-polyester composites which occurs with a variation of temperature and specimen size. 

Figqure 4. Absorbed energy vs. specimen size relationship for various glass fiber composites at room temperature... 

Use Dyeing mordant, water purification, waterproofing fabrics, manufacture of lakes, filtering medium, chemicals (aluminum salts), lubricating compositions, manufacture of glass, sizing paper, ceramic glaze, antacid. 

Use Adhesives, thickening agent, sizing paper and textiles, substitute for natural gums, food industry, glass-silvering compositions, printing inks, felt manufacture, substitute for lactose in penicillin manufacture, fuel in pyrotechnic devices. 

An X-ray diffraction and P MAS NMR study of rare-earth phosphate glasses of composition (R203)(x)P205)(l — x) where x = 0.175-0.263 and R = La-Er (except for Pm), is presented. The structures of these materials were investigated as a function of (a) rare-earth atomic number and (b) glass composition. The results show an increase in rare-earth coordination number from six to seven as the rare-earth ion increases in size. ... 

Optical absorption spectra were measured using the glass and composite samples of 2-4 mm thickness in the IR, visible- and UV-regions. The pore-size distribution in the gel structure measured by BET-method has a complex character the network contains micro- (3.0 nm), meso- and macro-pores (5-25 nm). The pore size can be increased by chemical attack of silica network by fluorine ions in solution and also in vapor phase until heating and dissociation of F-containing compounds (HF, NH4F). 

Features Improves str. as glass fiber size composite in reinforced polyester composites enhances initial wet str. of reinforced polyester resin composites enhances wet elec, props, of many min.-filled and reinforced composites... 

Residual thermal stresses may lead to spontaneous microcracking of glass matrix composites provided the size of the embedded particles is greater than the so-called critical particle size Dc [9]. Several approaches have been developed to determine Dc. In the model of Davidge and Green, for example, Dc is given by [9] ... 

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