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公开(公告)号：KR1020050023550A
公开(公告)日：2005-03-10
申请号：KR1020030059864
申请日：2003-08-28
IPC分类号： B22C1/14
摘要： PURPOSE: A magnesia-phosphate based investment is provided to make it possible to produce a smooth and metal-colored cast by reducing burn-on sand reaction caused by surplus phosphorus at high temperature and to improve strength at high temperature. CONSTITUTION: The magnesia-phosphate based investment for precision-casting cast metal comprises 9-13 parts by weight of magnesia, 5.5-8 parts by weight of ammonium phosphate, monobasic, 20-40 parts by weight of quartz sand, 1-5 parts by weight of alumina, 1-3 parts by weight of zirconia, and 0.02-0.05 parts by weight of nano-size alumina based on 100 parts by weight of refractory materials. Phosphate content is restricted to 8 parts by weight based on 100 parts by weight of refractory materials. Quartz sand is mixed in a certain ratio to reduce a watered ratio.
摘要翻译： 目的：提供一种基于磷酸镁的投资，通过在高温下减少由多余的磷引起的烧伤砂反应并提高高温强度，从而可以生产出光滑的金属色铸件。 构成：精密铸造铸造金属的磷酸镁基投资包括9-13重量份的氧化镁，5.5-8重量份的磷酸铵，一元的，20-40重量份的石英砂，1-5份 的氧化铝，1-3重量份的氧化锆和0.02-0.05重量份的基于100重量份的耐火材料的纳米尺寸的氧化铝。 基于100重量份的耐火材料，磷酸盐含量限制在8重量份。 石英砂以一定的比例混合，以减少浇水比。
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公开(公告)号：KR100530313B1
公开(公告)日：2005-11-22
申请号：KR1020030059864
申请日：2003-08-28
IPC分类号： B22C1/14
摘要： 본 발명은 치과용 금합금을 비롯한 비귀금속합금의 정밀주조를 위한 마그네시아-포스페이트계 매몰재에 관한 것으로, 결합재로 마그네시아와 제일인산암모늄염을 사용하였고 쿼츠(quartz), 크리스토발라이트(cristobalite), 산화알루미늄(Alumina) 및 산화지르코늄(Zirconia)을 내화재로 하였으며, 인산염의 함량을 내화물 100중량부에 대하여 8% 이하로 제한하며, 혼수비를 줄이기 위해 쿼츠샌드(Quartz Sand)를 일정비율로 혼합한 금속주조용 부정형 내화물이다.
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公开(公告)号：KR1020040020621A
公开(公告)日：2004-03-09
申请号：KR1020020052260
申请日：2002-08-31
IPC分类号： C04B28/14
CPC分类号： C04B28/146 , C04B24/16 , C04B2111/00431 , C04B2111/00836 , C04B2111/346
摘要： PURPOSE: Provided is a gypsum-bonded investment for a dental metal restoration material or a metal casting, which has strength sufficient to resist the casting pressure and an expansion ratio sufficient to compensate the shrink of metal on casting. CONSTITUTION: The gypsum-bonded investment comprises an alpha type calcium sulfate hemihydrate as a binder and a refractory material, wherein the gypsum-bonded investment further comprises at least one material selected from melamine sulfonated formaldehyde condensate and bentonite. Particularly, the refractory material comprises quartz and cristobalite. Preferably, the gypsum-bonded investment comprises 20-30 wt% of alpha type calcium sulfate hemihydrate, 20-40 wt% of quartz, 40-60 wt% of cristobalite, 0.1-0.5 wt% of melamine sulfonated formaldehyde condensate and 0.1-1 wt% of the bentonite.
摘要翻译： 目的：提供一种用于牙科金属修复材料或金属铸件的石膏结合投资，其具有足以抵抗铸造压力的强度和足以补偿铸造时金属收缩的膨胀比。 构成：石膏粘合投资包括α型硫酸钙半水合物作为粘合剂和耐火材料，其中石膏粘合的投资还包括选自三聚氰胺磺化甲醛缩合物和膨润土中的至少一种材料。 特别地，耐火材料包括石英和方英石。 优选地，石膏结合投资包含20-30重量％的α型硫酸钙半水合物，20-40重量％的石英，40-60重量％的方石英，0.1-0.5重量％的三聚氰胺磺化甲醛缩合物和0.1-1 wt％的膨润土。
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