2013年4月11日星期四

The high temperature glass the perspective window glass in a certain temperature and pressure conditions, with stable high transparency, heat resistance, high compressive strength, good chemical resistance.High temperature glass soda-lime-borosilicate glass, alkali-aluminosilicate glass, three series of high-purity silica glass ", a number of varieties. Advanced cold technology,Cultured Stone Veneer to ensure the the various endoscopic inherent quality and dimensional accuracy; non-directional "quench temperature field application, the small size of the" edges "of the sight glass to ensure that the sodium calcium, aluminum-silicon Endoscopic and borosilicate glass of high strength. Compared with similar products at home and abroad, has the quality, performance advantage.
Classified by raw materialsHigh temperature glass raw materials, can be divided into heat: 350 degrees, 500 degrees, 000 degrees, 1500 degrees four series.1 material temperature glass:Maximum temperature: 350 ° C hot and cold fusion temperature difference: 200 ° C transparency: ≥ 90%Glass thickness :2-50mmSpecifications: on-demand production, with round, square piece, shaped tablets.2, material temperature glass:Maximum temperature: 500 ° C hot and cold fusion temperature difference: 300 ° C transparency: ≥ 92%Glass thickness :2-20mmSpecifications: on-demand production, with round, square piece, shaped tablets.3 material high temperature glass:A maximum temperature of 800-1000 ° C hot and cold fusion temperature difference: the 700 ℃ transparency: ≥ 90%Glass thickness: 3, 4, 5 mmSpecifications: Maximum capacity 1960 * 1100mm, with round, square piece, shaped tablets.4 material temperature glass:Maximum temperature: 1500 ° C hot and cold fusion temperature difference: the 1200 ℃ transparency: ≥ 92%Glass thickness :2-50mmSpecifications: on-demand production, can produce 700 * 1500mm, with round, square piece, shaped tablets.Stone, the previous period and radioactive radiation "is often linked, so that many people who would like to use stone because radioactive stone discouraged, the stone is on pins and needles, readers often called to ask where can detect the radioactive stone? If the home is paved stone the how to do? anxious the meaning of loneliness. The radioactive stone in the end is how one thing can rest assured that the home, the reporter visited the associate professor of China University of Geosciences (Beijing) Department of Applied Geophysics Sheng-Li Hou.■ any decorative materials have natural radioactivity, only more than the standard only hazardsHou said: the nature any substance containing naturally occurring radioactive elements, but the content of radioactive elements in the different substances. The environment around us in the soil, water and even the air has a radioactive element, stone building and furnishing materials, such as cement, steel, tiles, whole body tiles and stone contain radioactive elements. Take the whole body tiles, baked clay addition of other materials, the clay is formed by the weathering of rocks, clay and stone are the same as the formation of natural radioactive elements in the clay is relatively high, that brick firing by the whole body The content of radioactive elements will be correspondingly high, so that only the stone to be radioactive material does not contain radioactive view is incorrect. The Ministry of Health also released as early as "building health protection standards, restrictions on the activity of natural radioactive elements in building materials, to ensure safe use.■ 80% of the stone can be assured for indoor use, very low levels of radioactive stone can shield the radiation of other materialsWhen a reporter asked what kind of stone suitable for use at home, how to choose, Hou said: As early as 1993, the National Building Materials Bureau issued a "natural stone products Radiological Protection control standards, the radioactive level of natural stone the classification, natural stone is divided into A, B, C three categories of products, a class A product can be used in any occasion, a class B product can be used in addition to the room outside the interior surface of the internal and external finishes of all buildings and industrial facilities C class standard stone only can be used as external finishes of the building. Test and analysis results from nearly 200 samples, 80% of the stone samples belong to the class A stone can be used on any occasion. Which part of the stone radioactive content is very low, lower even than the concrete floor, brick radioactive content, using this stone, you can play in the indoor shielding effect, reduce the indoor radiation has a role in environmental protection.Some people due to lack of knowledge of the radioactive form a one-sided understanding, such as some people think that a light-colored stone radioactive than dark stone, in fact, this is not absolute levels of radioactivity are not many dark stone (such as red) higher than the Class A required standards, lower than some light-colored stone, which can be proved in the tests we did.■ How to detect indoor radioactive poisoning.How to detect the interior materials are not exceeded concern of many people. According to Hou, the conventional test methods is room Neijia Ma spectroscopy analysis and radiochemical analysis To test the sample ground and sealed sample analysis cycle in about 20 days, long life cycle analysis costs are relatively high. In view of this situation, in support of the national the stone quality monitoring center, China University of Geosciences (Beijing) Department of Applied Geophysics, China Stone Material Industry Association cooperation in the development of the first stone radioactive detector and its associated methods of measurement technology and by the experts of the National Building Materials Bureau, the Beijing Municipal Bureau of Quality and Technical Supervision issued the certificate. Cultured Stone Veneer Geophysical Department of Geology University, the reporters saw this instrument, equipped with a probe of the instrument like a flashlight, packed a small display tester, this portable instrument can be brought to the scene for testing, do not need to destroy the finished product can be directly on the finished product testing, test range up to 50 × 50 cm, and the short detection time, it normally takes about 10 minutes measured. Finally, Hou said that the home environment as a whole, as long as the radioactive indicators in this environment is up to standard, not harmful to human impact, not because of fear of a certain radioactive materials exceeded blind removal, the unnecessary waste and trouble.

没有评论:

发表评论