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坩堝(圖1)

鎢坩堝(英文名稱(chēng):Tungsten Crucibles)是金屬鎢制品之,主要分為燒結成型(應用到粉末冶金技術(shù)),沖壓成型,旋壓型。利用鎢棒車(chē)削加工成型(般尺寸比較?。?,焊接成型多種,采用純鎢板,鎢片和純鎢棒經(jīng)相應的工藝加工而成。鎢坩堝可以在2600度以下的真空惰性氣體中使用。鎢的熔點(diǎn)沸點(diǎn)高,高溫強度好,抗磨耐腐蝕,熱傳導率大,熱膨脹系數小,淬透性好。鎢坩堝被廣泛應用于稀土冶煉,石英玻璃,電子噴涂,晶體生長(cháng)等行業(yè)·

簡(jiǎn)介

鎢的熔點(diǎn)、沸點(diǎn)高,高溫強度好,抗摩耐腐蝕,熱傳導率大,熱膨脹系數小,淬透性好,得益于如此優(yōu)良的性,鎢坩堝廣泛應用于稀土冶煉,石英玻璃,電子噴涂,晶體生長(cháng)等行業(yè)。

物理化學(xué)性能

1、 純度:W≥99.95%;

2、 密度:≥18.5g/cm3;

3、 應用溫度環(huán)境:2400℃。

 

生產(chǎn)工藝

鎢粉--過(guò)篩--合批--等靜壓制--粗坯車(chē)加工--中頻燒結--精品車(chē)加工--包裝。

用途

由于鎢的熔點(diǎn)高達3410℃,因此鎢坩堝被廣泛應用于藍寶石單晶生長(cháng)爐、石英玻璃熔煉爐、稀土冶煉爐等工業(yè)爐內的核心容器,其使用的工作溫度環(huán)境般在2000℃以上。別對于藍寶石單晶生長(cháng)爐來(lái)說(shuō),具有高純度、高密度、無(wú)內裂紋、尺寸、內外壁光潔、等征的鎢坩堝對藍寶石晶體生長(cháng)過(guò)程中的種晶成功率、拉晶質(zhì)量控制、脫晶粘鍋以及使用壽命起到了關(guān)鍵性的作用。


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