高硼矽玻璃是利用玻璃在高溫狀態下導電的特性,通過在玻璃內部加熱來實現玻璃熔化,經先進生產工藝加工而成。玻璃管中SiO2(氧化矽)>78%,B2O3(氧化硼)>10%,矽和硼的含量很高。
目錄
1原料
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成型1原料編輯
包括主要原料和輔助原料。前者指引入玻璃的形成網路結構的氧化物、中間體氧化物和網路外氧化物等原料;後者可以加速玻璃熔製,或使其獲得某種必要的性質。
主要原料
根據引入氧化物的性質,分為酸性氧化物原料、堿金屬氧化物原料和堿土金屬氧化物原料。
①酸性氧化物原料:有SiO2、B2O3、Al2O3等的原料。SiO2是矽酸鹽玻璃中玻璃結構的骨架。它賦予玻璃高強度、良好的化學穩定性、耐熱性和低膨脹性,但會使玻璃的熔融溫度增高,粘度增大。SiO2的引用原料是矽砂或砂巖、石英巖。玻璃中加B2O3,可降低玻璃的熱膨脹性,提高折射率、耐熱急變性和耐化學侵蝕性,在溫度較高時能降低玻璃粘度,溫度較低時提高玻璃粘度。B2O3的引用原料是硼砂或硼酸。玻璃中加 Al2O3能減小玻璃析晶傾向和增強化學穩定性,提高強度,增大玻璃粘度。其引用原料通常是伴含K2O或Na2O和SiO2的長石,也可以用工業氧化鋁等。 滄州市天暢工藝玻璃製品廠專業生產各種型號高硼矽玻璃管
②堿金屬氧化物原料:有Na2O、K2O的原料。玻璃中加Na2O和K2O成分可降低熔融溫度,減小粘度,但會使玻璃的化學穩定性變差。其引用原料是純堿(Na2CO3)和鉀堿(K2CO3)。
③堿土金屬氧化物原料:有CaO、MgO、BaO、ZnO、PbO的原料。玻璃中加 CaO和MgO能減弱鈉矽玻璃析晶傾向,增強化學穩定性,高溫時能降低玻璃粘度,促進玻璃熔化和澄清,但溫度降低時粘度增加很快,成型操作困難。其引用原料是石灰石(CaCO3)和菱苦土(MgCO3),或用同時含CaO和MgO的白雲石。玻璃中常加BaO和ZnO以調節玻璃的化學穩定性和折射率等性質,其引用原料常為工業ZnO和BaCO3、BaSO4或 Ba(NO3)2。玻璃中加PbO可顯著提高折射率和色散,使玻璃吸收短波長射線,同時,比重增大,熔融溫度降低,與金屬浸潤性好。PbO的引用原料是紅丹和黃丹或工業硝酸鉛。
新手教學
批發市場僅提供代購諮詢服務,商品內容為廠商自行維護,若有發現不實、不合適或不正確內容,再請告知我們,查實即會請廠商修改或立即下架,謝謝。