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超硬玻璃 by Mind Map: 超硬玻璃
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超硬玻璃

藍寶石 世界第二硬

原料

鋁礬土

Al2O3

作法

KY法

加熱到 2200℃

太陽表面溫度約 5500℃

熔爐中央放置晶種

藍寶石桿

用途

保護罩