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SYNTHESIS OF LOW-THERMAL-EXPANSION (ZRO)2P2O7 POWDERS
The present invention provides a manufacturing method of low thermal expansion (ZrO) 2P2O7. The method comprises the following steps: preparing ZrO(NO3)2·xH2O and P2O5 at a 2 : 1 ratio as a starting material; preparing a precursor mixture by mixing a PVA solution after dissolving the starting material in distilled water; obtaining a precursor of a gel state by drying the mixture; and heat-treating the dried precursor. A low thermal expansion ceramic of the present invention can synthesize the (ZrO) 2P2O7 powder on α which is stable when being heat-treated for four hours at 1200°C with a PVA content of a 12 : 1 ratio, and can be used as a low thermal expansion pillow while showing a negative thermal expansion coefficient of 2.5 × 10-6/°C.
본 발명은 출발물질로 ZrO(NO)·xHO 및 PO를 2:1의 몰 비율로 준비하고, 상기 출발물질을 증류수에 용해시킨 후, PVA 용액을 혼합하여 전구체 혼합물을 준비하고, 상기 혼합물을 건조하여 겔 상태의 전구체를 얻고, 건조된 상기 전구체를 열처리하는 단계를 포함하는 저열팽창성 (ZrO)PO분말 제조방법을 제공한다. 본 발명의 저열팽창성 세라믹은 12:1의 PVA 함량과 1200℃에서 4시간 열처리 시 안정된 α상의 (ZrO)PO분말을 합성할 수 있고, -2.5 × 10/℃의 음의 열팽창계수를 보이며 저열팽창성 필로로 활용될 수 있다.
SYNTHESIS OF LOW-THERMAL-EXPANSION (ZRO)2P2O7 POWDERS
The present invention provides a manufacturing method of low thermal expansion (ZrO) 2P2O7. The method comprises the following steps: preparing ZrO(NO3)2·xH2O and P2O5 at a 2 : 1 ratio as a starting material; preparing a precursor mixture by mixing a PVA solution after dissolving the starting material in distilled water; obtaining a precursor of a gel state by drying the mixture; and heat-treating the dried precursor. A low thermal expansion ceramic of the present invention can synthesize the (ZrO) 2P2O7 powder on α which is stable when being heat-treated for four hours at 1200°C with a PVA content of a 12 : 1 ratio, and can be used as a low thermal expansion pillow while showing a negative thermal expansion coefficient of 2.5 × 10-6/°C.
본 발명은 출발물질로 ZrO(NO)·xHO 및 PO를 2:1의 몰 비율로 준비하고, 상기 출발물질을 증류수에 용해시킨 후, PVA 용액을 혼합하여 전구체 혼합물을 준비하고, 상기 혼합물을 건조하여 겔 상태의 전구체를 얻고, 건조된 상기 전구체를 열처리하는 단계를 포함하는 저열팽창성 (ZrO)PO분말 제조방법을 제공한다. 본 발명의 저열팽창성 세라믹은 12:1의 PVA 함량과 1200℃에서 4시간 열처리 시 안정된 α상의 (ZrO)PO분말을 합성할 수 있고, -2.5 × 10/℃의 음의 열팽창계수를 보이며 저열팽창성 필로로 활용될 수 있다.
SYNTHESIS OF LOW-THERMAL-EXPANSION (ZRO)2P2O7 POWDERS
저열팽창성 (ZrO)2P2O7 분말 제조방법
LEE SANG JIN (author)
2015-11-20
Patent
Electronic Resource
Korean
IPC:
C04B
Kalk
,
LIME
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