Development of structures and technology of obtaining of lead-bearing glasses and glass ceramics
Subjects of research: lead-silicate glasses, the painted glasses with using of rare and rare-earth elements, glass-ceramic materials, microballs, road-alarm signs, cat's eyes, art details, glass and glass ceramics before and after y-irradiations.
Purpose of work: working out of structures of glasses on the basis of PbO-SiO2 system, definition of physical and chemical properties by experimental and settlement paths, research of possibility reception of the painted glasses and glass ceramics, definition of areas of their use.
Methods of research: chemical, optical, radiographic, electron-microscopic, thermographical, IR spectroscopic, standard methods of definition of physical and chemical properties, etc.
The results obtained and their novelty. For the first time in system PbO-SiO2 two structures (70% PbO + 30% SiO2 and 80% PbO + 20% SiO2) are defined as optimum from the point of view of obtaining on their basis glass balls, cat's eye, art details, y-steady materials.
For the first time experimentally confirmed that silicate-formation in charges 80% PbO + 20% SiO2 proceeds through formation of intermediate phases -2PbO-SiO2 and PbOSiO2; in charges 70% PbO + 30% SiO2 as an intermediate phase acts only PbO SiO2.
For the first time for binary lead-silicate glasses are considered all work cycle of transition from glass in microglass balls and then in road-alarm signs.
There are obtained colour glasses with application Cr2O3, Mn2O3, Fe2O3 and Ni2O3 and defined their suitability for manufacturing of stained-glass windows, a panel and etc.
There are synthesized glasses with a number of rare-earth elements and studied the possibility of their transformation in glass ceramics. It is considered the possibility of using of the obtained materials as glasses, steady to y-irradiation. Its is specified the necessity of carrying out of the further researches for this direction.
The mechanism of formation of PbO SiO2 as phase is specified at low-temperature of process of formation glass ceramics considered glasses depending on heat treatment and crystallisation conditions.
Practical value: possibility of manufacture on the basis of lead suric and natural quartz sand Dzheroj and Tozbulaksky deposits of transparent glasses suitable for manufacturing of the road-alarm signs is proved, the developed effective painted glasses have an urgency for creation import-swapping manufactures of the decorated products-stained-glass windows, panels, etc. The developed glass ceramics on preliminary data are suitable for creation of steady to y-irradiation of materials.
Degree of embed and economic effectivity: the developed optimum structures of glasses and glass ceramics are approved in conditions of «Olmazor TMTYICHK» and industrial enterprise "EUROSTYLE".
Economic benefit from using of oxides PbO, SiO2 with the additive oxides of pine forest and sodium as a result of quality improvement of micro-glass balls has made counting on 1 kg of glass 13920 - 14400 soums according to 2006 year.
Economic benefit from using of oxides of rare-earth elements in system PbO -SiO2 as a result of improvement of quality of colour glasses has made counting on 1 m2 glasses 11750 - 12500 soums according to 2008 year.
While in service within 6 months it is established, that reflective ability of the made signs meet the established requirements.
Field of application: - road technics;
- decoration and design;
- modern technics in the form of radiation-steady means.