Sanitary ware is an indispensable part of modern interior architecture. It is necessary to satisfy the functional requirements and consider the new stage of energy saving and water saving.
There are many kinds of sanitary ware, but their common requirements are smooth surface, impervious to water, corrosion-resistant, cold-heat resistant, easy to clean, and durable.
Before decorating the bathroom, we should first understand the size of the bathroom parts, design layout should be in place, in addition to floor tiles, wall tiles, hanging flat top, the focus is on the bathtub, washbasin and toilet (bath called "three-piece"). In general, there are the following requirements:
Price Positioning: At present, the market has more than 8,000 yuan imported original three-piece, there are 5,000 yuan in the mid-range three-piece and 3,000 yuan in the low-grade three-piece. For the working class, the use of sanitary ware with a price between 1,500 and 3,000 yuan is more economical.
Style positioning: ceramic sanitary ware is more traditional and nostalgic; tempered glass sanitary ware is slightly fashionable; artificial marble and artificial agate are concrete and noble; acrylic ware is beautiful and easy to clean.
The positioning and unity of color: At present, the color of sanitary ware products on the market is very rich, with purple color, bone color, white, milky white, sapphire blue, pink, etc., buy three-piece sanitary ware, it is best to use the same brand of a manufacturer's products To avoid the strong contrast of color.
In the selection of sanitary ware, the following points should be noted:
1. Before choosing the toilet, make sure whether the reserved water outlet is the lower drain or the horizontal drain.
2, whether the toilet water-saving, can not just look at the size of the tank. As a toilet, its flushing function is the most critical place. Flushing is not only clean and sanitary, but also saves water and noise. The inspection method is to use table tennis as a flush test, and at least one flush should be performed. Currently, there are two types of toilets on the market: siphon flush and direct flush. The general high-end products adopt siphon flushing, and the siphon is a kind of flushing method with low noise and good flushing effect.
3. The general high-quality sanitary ware is glazed and smooth. There are no phenomena such as squat ponds, chromatic aberration, pinholes, and lack of glazing. The sound produced by striking a ceramic with a hard object is crisp.
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15-25Mm Calcium Carbide: Physical and chemical properties: ores are solid brown or black block, pure white crystals (including CaC2 higher purple). Density of 2.22 g / cubic centimeter, the melting point of 2300 ° C (with CaC2 content), water immediately intense reaction to generate acetylene, and release heat, Calcium Carbide content varies with the melting point also will change.
Impurities: Caustic soda often contain calcium arsenide (Ca3As2), calcium phosphide (Ca3P2) and other impurities, and the role of water at the same time release arsine (AsH3), phosphine (PH3) and other toxic gases, so the use of Acetylene generated by calcium carbide is toxic.
Crystal structure
The most common crystal form of CaC2 is tetragonal, stable between 298K and 720K. Quartet CaC2 similar to the crystal structure of NaCl, but due to [: C≡C:] 2- ion oval, oriented, the crystal is tetragonal. In CaC2 crystal, the C-C distance is 120pm, which corresponds to the bond length of carbon-carbon triple bond, the distance between Ca and C is 259 and 282pm.
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