CN110483054B - 一种大尺寸复杂形状人造宝石工艺品的制备方法 - Google Patents

一种大尺寸复杂形状人造宝石工艺品的制备方法 Download PDF

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CN110483054B
CN110483054B CN201910854754.6A CN201910854754A CN110483054B CN 110483054 B CN110483054 B CN 110483054B CN 201910854754 A CN201910854754 A CN 201910854754A CN 110483054 B CN110483054 B CN 110483054B
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戴培赟
李晓丽
王东娟
周平
刘茹
张吉亮
殷铭良
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Abstract

本发明公开了一种大尺寸复杂形状人造宝石工艺品的制备方法,取蔓藤科植物果实为原料,沸水蒸煮烘干,置于高温炉中,在真空条件下高温炭化,制得多孔碳支架,以去离子水为分散介质,加入碳化硅晶须和六偏磷酸钠或羧甲基纤维素钠为分散剂,以HCl和NaOH为调节剂调节料浆的pH值在8~10,机械搅拌配置碳化硅晶须的悬浮料浆;将多孔碳支架置于碳化硅晶须料浆中,在真空罐中抽真空,碳化硅晶须通过毛细管力和吸附作用进入碳支架内部,浸渍后通气至真空罐内至常压,取出多孔碳支架;将经碳化硅晶须料浆浸渍过的多孔碳支架置于鼓风干燥箱中烘干,制得C/SiCw素坯;本发明的有益效果是工艺简单,制造周期短,能够有效降低成本。

Description

一种大尺寸复杂形状人造宝石工艺品的制备方法
技术领域
本发明属于人造宝石制备技术领域,涉及一种大尺寸复杂形状人造宝石工艺品的制备方法。
背景技术
碳化硅俗称金刚砂,是媲美金刚石的人造宝石品种之一,耐温2000℃以上,莫氏硬度约9.5,高于刚玉(红宝石、蓝宝石)、玛瑙和硬质合金。300℃以下可承受所有强酸强碱、包括王水的长时间腐蚀。人造宝石制造成本高、产品尺寸小,且由于硬度高,加工困难,难以生产大尺寸和形状复杂的产品,本发明另辟蹊径,以生物模板法为基础,结合浸渍法和反应烧结技术制备碳化硅材质的大尺寸复杂形状人造宝石工艺品,克服了人造宝石由于硬度高导致的加工困难问题。
发明内容
本发明的目的在于提供一种大尺寸复杂形状人造宝石工艺品的制备方法,本发明的有益效果是工艺简单,制造周期短,能够有效降低成本,提高生产效率,适合于大规模工业化生产。
本发明所采用的技术方案是取蔓藤科植物果实为原料,沸水蒸煮后,烘干制得原始生物模板,置于高温炉中,在真空条件下高温炭化,制得多孔碳支架,以去离子水为分散介质,加入碳化硅晶须,再加入六偏磷酸钠或羧甲基纤维素钠为分散剂,以HCl和NaOH为调节剂调节料浆的pH值在8-10,机械搅拌配置碳化硅晶须的悬浮料浆;将多孔碳支架置于碳化硅晶须料浆中,在真空罐中抽真空,碳化硅晶须通过毛细管力和吸附作用进入碳支架内部,浸渍后通气至真空罐内至常压,取出多孔碳支架;将经碳化硅晶须料浆浸渍过的多孔碳支架置于鼓风干燥箱中烘干,制得C/SiCw素坯;
将烘干后的素坯置于石墨坩埚中,加入单质硅粒或硅粉,置于高温炉中,抽真空,高温保温,单质硅高温熔融后通过毛细管力进入多孔坯体内部,与坯体中的碳反应形成与原始葫芦形状相同、尺寸相近的碳化硅结构;将反应后的碳化硅质产品冷却后,通过酸洗去除表面附着的单质硅,经打磨、抛光工艺处理,制得大尺寸复杂形状的人造宝石工艺品葫芦。
进一步,沸水蒸煮10min后,经80℃烘干8h制得原始生物模板;将烘干后的生物模板置于高温炉中,在真空条件下以2℃﹒min-1的升温速率升至800℃,保温1h,模板炭化后制得多孔碳支架;以去离子水为分散介质,加入以相对于溶剂的质量分数计质量分数5%-15%的碳化硅晶须,和以相对于碳化硅晶须的质量分数计质量分数为1%-2%的六偏磷酸钠或羧甲基纤维素钠为分散剂,以HCl和NaOH为调节剂调节料浆的pH值在8-10,机械搅拌30min配置碳化硅晶须的悬浮料浆;将多孔碳支架置于碳化硅晶须料浆中,在真空罐中抽真空至3000Pa以下,碳化硅晶须通过毛细管力和吸附作用进入碳支架内部,浸渍5min后通气至真空罐内至常压,取出多孔碳支架;将经碳化硅晶须料浆浸渍过的多孔碳支架置于鼓风干燥箱中,80℃烘干8h-12h,制得C/SiCw素坯;将烘干后的素坯置于石墨坩埚中,加入多孔碳支架质量2.5-3倍的单质硅粒或硅粉,置于高温炉中,抽真空至200Pa以下,以5℃﹒min-1的升温速率升至1500℃-1600℃,保温1h,单质硅高温熔融后通过毛细管力进入多孔坯体内部,与坯体中的碳反应形成与原始葫芦形状相同、尺寸相近的碳化硅结构。
附图说明
图1是实施例的实物产品示意图。
具体实施方式
下面结合具体实施方式对本发明进行详细说明。
以葫芦造型工艺品为例,选取爬藤植物葫芦的果实为原料,以生物模板法为基础,结合反应烧结技术,经蒸煮、晾干后制得原始生物模板,也可以直接以市售工艺品葫芦为原始模板,经80℃烘干8h、800℃炭化1h后形成多孔碳支架,将多孔碳支架放入碳化硅晶须料浆中真空浸渍5min后烘干,在高温炉中加入硅粉埋烧,硅粉在1410℃熔融,熔融硅在毛细管力的作用下进入多孔碳支架,与碳反应形成碳化硅结构,经腐蚀或抛光去除表面沉积的部分硅,制得与原始葫芦结构形状相同、尺寸相近的人造宝石工艺品葫芦。产品表面呈黑色,抛光后具有金属光泽;图1为实物产品。
本发明制备方法加工和制备成本低,所使用的原始模板不限于葫芦,可采用任意加工性能好的木材或其他多孔碳质材料,预先经机械加工或雕刻形成所需要的形状和尺寸,经炭化和渗硅后制得所需要的人造宝石产品。由于碳化硅材料的优异性能,本工艺制得的产品应用范围不限于工艺品,也可用于各种工业和机械结构部件、异形件,用于替代耐高温、耐腐蚀、耐磨损工况下的其他材料,提高部件性能和使用寿命。
以上所述仅是对本发明的较佳实施方式而已,并非对本发明作任何形式上的限制,凡是依据本发明的技术实质对以上实施方式所做的任何简单修改,等同变化与修饰,均属于本发明技术方案的范围内。

Claims (2)

1.一种大尺寸复杂形状人造宝石工艺品的制备方法,其特征在于:取蔓藤科植物果实为原料,沸水蒸煮后,烘干制得原始生物模板,置于高温炉中,在真空条件下高温炭化,制得多孔碳支架,以去离子水为分散介质,加入碳化硅晶须,再加入六偏磷酸钠或羧甲基纤维素钠为分散剂,以HCl和NaOH为调节剂调节料浆的pH值在8-10,机械搅拌配置碳化硅晶须的悬浮料浆;将多孔碳支架置于碳化硅晶须料浆中,在真空罐中抽真空,碳化硅晶须通过毛细管力和吸附作用进入碳支架内部,浸渍后通气至真空罐内至常压,取出多孔碳支架;将经碳化硅晶须料浆浸渍过的多孔碳支架置于鼓风干燥箱中烘干,制得C/SiCw素坯;
将烘干后的素坯置于石墨坩埚中,加入单质硅粒或硅粉,置于高温炉中,抽真空,高温保温,单质硅高温熔融后通过毛细管力进入多孔坯体内部,与坯体中的碳反应形成与原始葫芦形状相同、尺寸相近的碳化硅结构;将反应后的碳化硅质产品冷却后,通过酸洗去除表面附着的单质硅,经打磨、抛光工艺处理,制得大尺寸复杂形状的人造宝石工艺品葫芦。
2.按照权利要求1所述一种大尺寸复杂形状人造宝石工艺品的制备方法,其特征在于:所述沸水蒸煮10min后,经80℃烘干8h制得原始生物模板;将烘干后的生物模板置于高温炉中,在真空条件下以2℃﹒min-1的升温速率升至800℃,保温1h,模板炭化后制得多孔碳支架;以去离子水为分散介质,加入以相对于溶剂的质量分数计质量分数5%-15%的碳化硅晶须,和以相对于碳化硅晶须的质量分数计质量分数为1%-2%的六偏磷酸钠或羧甲基纤维素钠为分散剂,以HCl和NaOH为调节剂调节料浆的pH值在8-10,机械搅拌30min配置碳化硅晶须的悬浮料浆;将多孔碳支架置于碳化硅晶须料浆中,在真空罐中抽真空至3000Pa以下,碳化硅晶须通过毛细管力和吸附作用进入碳支架内部,浸渍5min后通气至真空罐内至常压,取出多孔碳支架;将经碳化硅晶须料浆浸渍过的多孔碳支架置于鼓风干燥箱中,80℃烘干8h-12h,制得C/SiCw素坯;将烘干后的素坯置于石墨坩埚中,加入多孔碳支架质量2.5-3倍的单质硅粒或硅粉,置于高温炉中,抽真空至200Pa以下,以5℃﹒min-1的升温速率升至1500℃-1600℃,保温1h,单质硅高温熔融后通过毛细管力进入多孔坯体内部,与坯体中的碳反应形成与原始葫芦形状相同、尺寸相近的碳化硅结构。
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