熔融石英

熔融石英是以優(yōu)質(zhì)的東海石英為原料，經(jīng)挑選、粗破碎、磁選除鐵、酸洗、烘干粗細(xì)磨、整形分篩等一系列工藝加工而成。由于經(jīng)1700C-2500C高溫?zé)坪筠D(zhuǎn)化而成的熔融型或無(wú)定形石英，石英晶體結(jié)構(gòu)產(chǎn)生改變，使熔融石英比天然結(jié)晶型石英純度更高、比重和熱膨脹系數(shù)較低，外觀為無(wú)色透明，有少部分乳白霧狀氣泡，可按用戶要求粒度加工。

Fused quartz and fused silica are types of glass containing primarily silica in amorphous (non-crystalline) form. They are manufactured using several different processes. Note that glasses formed by the traditional 'melt-quench' methods (heating the material to melting temperatures, then rapidly cooling to the solid glass phase), are often referred to as 'vitreous', as in 'vitreous silica'. The term 'vitreous' is synonymous with 'glass', when used in the melt-quench context.

Fused quartz is manufactured by melting naturally occurring quartz crystals of high purity at approximately 2000°C, using either an electrically heated furnace (electrically fused) or a gas/oxygen-fuelled furnace (flame fused). Fused quartz is normally transparent.

Fused quartz can also form naturally. The naturally occurring form is usually referred to as Metaquartzite and is formed under metamorphic conditions. An increase in heat causes the crystals within the quartz to become fused together.

Fused silica is produced using high purity silica sand as the feedstock, and is normally melted using an electric furnace, resulting in a material that is translucent or opaque. (This opacity is caused by very small air bubbles trapped within the material.)

Synthetic fused silica is made from a silicon-rich chemical precursor usually using a continuous flame hydrolysis process which involves chemical gasification of silicon, oxidation of this gas to silicon dioxide, and thermal fusion of the resulting dust (although there are alternative processes). This results in a transparent glass with an ultra-high purity and improved optical transmission in the deep ultraviolet. One common method involves adding silicon tetrachloride to a hydrogen-oxygen flame, however use of this precursor results in environmentally unfriendly by-products including chlorine and hydrochloric acid. To eliminate these by-products, new processes have been developed using an alternative feedstock, which has also resulted in a higher purity fused silica with further improved deep ultraviolet transmission.

Fumed silica is manufactured by a similar flame hydrolysis process to synthetic fused silica, however it is in the form of a fine powder/dust and is typically used in applications such as fillers for rubbers and plastics, coatings, adhesives, cements, sealants, cosmetics, pharmaceuticals, inks and abrasives.

The optical and thermal properties are superior to those of other types of glass due to its purity (or rather, its lack of impurities). For these reasons, it finds use in situations such as semiconductor fabrication and laboratory equipment. It has better ultraviolet transmission than most other glasses, and so is used to make lenses and other optics for the ultraviolet spectrum. Its low coefficient of thermal expansion also makes it a useful material for precision mirror substrates.

特性：幾近零的熱膨脹率、的熱穩(wěn)定性、純度高（SiO2含量高，鐵、鉀、鈉、鈦等含量低）、化學(xué)性質(zhì)穩(wěn)定、專(zhuān)用機(jī)械控制生產(chǎn)、粒度分布穩(wěn)定。

Properties： hardly coefficient of thermal expansion,excellent thermal stability、high purity、steady chemical property and distribution of(particle)size.

主要用途：環(huán)氧樹(shù)脂澆注、電子密封料、鑄造材料、耐火、陶瓷和玻璃行業(yè)原料、涂料、油漆行業(yè)原料等。

Main uses：epoxy resin pouring、electronic seal、foundry、ceramic，glasswork、paint etc.

熔融石英根據(jù)產(chǎn)品規(guī)格分為熔融石英塊、熔融石英砂、熔融石英粉。

1、熔融石英塊

Fused Quartz Lump

規(guī)格： 1-100mm

成份：SiO2:99.95%-99.99%;

Fe2O3:45 ppM max; Al2O3:50 ppM-100 ppM;

K2O:45 ppM max; Na2O:45 ppM max;

Li2O:2.0 ppM max; EC:1.8-2.2; PH:5.8

Spec： 1-100mm

Constituents：SiO2:99.95%-99.99%;

Fe2O3:45 ppM max; Al2O3:50 ppM-100 ppM;

K2O:45 ppM max; Na2O:45 ppM max;

Li2O:2.0 ppM max; EC:1.8-2.2; PH:5.8

2、熔融石英砂 Fused Silica Sand

規(guī)格：0.1-15mm

成份：SiO2:99.95%-99.99%min;

Fe2O3:50 ppM max; Al2O3:50 ppM-100 ppM;

K2O:50 ppM max; Na2O:50 ppM max;

Li2O:2.0 ppM max; EC:1.8-2.2 ; PH: 5.8

Spec：0.1-15mm

Constituents：SiO2:99.95%-99.99%min;

Fe2O3:50 ppM max; Al2O3:50 ppM-100 ppM;

K2O:50 ppM max; Na2O:50 ppM max;

Li2O:2.0 ppM max; EC:1.8-2.2 ; PH: 5.8

3、熔融石英粉Fused Quartz Powder

規(guī)格：100-325目，325目-500目，500目，800目，1250目，1500目

成份：SiO2:99.93%-99.95%min;

Fe2O3:60 ppM max; Al2O3:60 ppM-500 ppM;

K2O:60 ppM max; Na2O:60 ppM max;

Li2O:2.0 ppM max; EC:1.8-2.2 ; PH: 6

Spec(mesh)：100-325，325 -500，500，800，1250，1500

Constituents：SiO2:99.93%-99.95%min;

Fe2O3:60 ppM max; Al2O3:60 ppM-500 ppM;

K2O:60 ppM max; Na2O:60 ppM max;

Li2O:2.0 ppM max; EC:1.8-2.2 ; PH: 6