高硼硅玻璃产品的英文简介

关于玻璃产品的英文简介

高硼硅玻璃Borosilicate glass

Borosilicate glass is a high silicate glass with at least 5%

boron oxide bow handle threaded rod with a triangular shaped handle.

Borosilicate glass is a particular type of glass, better known under the brand names Pyrex n. 派热克斯玻璃（一种耐热玻璃）

and Kimax. It was first develoed by German glassmaker

Otto Schott in the late 19th century and sold under the brand name "Duran" in 1893. After Corning corning n. 细粒透镜v. 使成粒状（corn的ing形式）Glass Works developed Pyrex in 1924, it became a synonym ['sinənim]n. 同义词；同义字for borosilicate glass in the English-speakin

g world.

Borosilicate glass is the oldest type of glass to have appreciable adj. 可评估的；可感知的；相当可观的resistance to thermal impact vt. 影响；撞击；冲突；压紧vi. 冲击；产生影响n. 影响；效果；碰撞；冲击力

and higher temperatures, also has excellent resistance to

chemical attack.

In this glass structure, the first to carry the Pyrex trademark, some of the SiO²is replaced by boric oxide.

Borosilicate glass has a low coefficient of thermal expansion and is, thus, suited for telescope mirrors and other precision parts. Also, because this glass can withstand thermal shock, it is used for oven and laboratory ware, headlamp['hedlæmp]n. 桅灯；照明灯；车前灯lenses, and boiler gage glasses. Most borosilicate glasses have better resistance to acids than do soda-lime碱石灰glasses, but poor resistance to alkalis'ælkəlai]n. 碱；可溶性无机盐adj.

碱性的. Glass fibers used in reinforcing plastic compounds['kɔmpau nd, kəm'paund]n. 化合物；混合物；复合词are a modified borosilicate glass.

Chemical Composition

SiO2 = 80%

B2O3 = 13%

Na2O +K2O= 4.3%

Al2O3 = 2.4%

Physical Properties

Coefficient of expansion (20°C–300°C) 3.3 x 10-6 K-1

Density 2.23g/cm3

Refractive index折射率：(Sodium D line) 1.474

Dielectric[,daii'lektrik] adj. 非传导性的；诱电性的n. 电介质；绝缘体constant 电容率

(1MHz, 20°C) 4.6

Specific heat比热(20°C) 750J/kg°C

导热系数(20°C) 1.14W/m°C

Pois son’s Ratio['reiʃiəu, -ʃəu] n. 比率，比例地基应力和变形泊松比(25°C –400°C) 0.2

Young’s Modulus['mɔdjuləs, -dʒu-]n. 模数；系数

弹性模量，杨氏系数(25°C) 6400 kg/mm2

Optical Information

Refractive index (Sodium D line) = 1.474

Visible light transmission,透光率2mm thick glass = 92% Visible light transmission,可见光穿透率5mm thick glass = 91% Critical Temperatures

150°C - When working above this temperature care should be taken to heat and cool Borosilicate glass in a slow and uniform manner.

500°C - The maximum temperature that Borosilicate glass should be subjected to and then only for short period of no longer than a few minutes.

510°C - Temperature at which thermal stress can be introduced to Borosilicate glassware.

565°C - Annealing[ə'ni:l]vt. 使退火，韧炼；锻炼n. 退火；锻炼，磨练temperature. When uniformly heated in controlled conditions, such as a