CN107903031A - 一种高强度骨质瓷素坯 - Google Patents
一种高强度骨质瓷素坯 Download PDFInfo
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Abstract
本发明公开了一种高强度骨质瓷素坯,属于陶瓷技术领域。按重量份数计,依次称取50~60份牛骨粉末,25~35份高岭土,8~18份石英,5~12份长石,5~10份添加剂,3~8份氧化金属混合物,4~7份氯酸钾和2~5份分散剂,将牛骨粉末,高岭土,石英,长石,氧化金属混合物和氯酸钾加入球磨机中,混合球磨,过筛,得球磨料,将球磨料与水按质量比10:1~12:1混合,并加入添加剂和分散剂,搅拌混合后,得混合料,将混合料除铁过滤,陈腐后,注浆成型,得坯料,将坯料移入烧结炉中,于氮气保护状态下,先低温烧结,再高温烧结,随炉冷却至室温后,出料,得高强度骨质瓷素坯。本发明制备的骨质瓷素坯具有优良的力学性能,抗热震性和较好的白度。
Description
技术领域
本发明公开了一种高强度骨质瓷素坯,属于陶瓷技术领域。
背景技术
骨质瓷是一种高档瓷,它因白度高、透明度好、瓷质细腻、釉面光亮平整的瓷器,素有“薄如纸、白如玉、明如镜、声如磬”的美称。骨质瓷是一种以动物骨灰为主,同时加入部分粘土、长石、石英等矿物原料,采用高温素烧、低温釉烧二次烧成工艺烧制的软质瓷。瓷坯物相组成主要是磷酸三钙、钙长石及一定含量的玻璃相。骨质瓷茶具,咖啡具家庭套具已成为各大小公司和富裕家庭的理想用具,更是馈赠亲友的最佳礼品。骨质瓷已经成为高档瓷消费的主导。骨质瓷虽然高贵,但其热稳定性远不如传统的滑石质日用细瓷等。热稳定性是指材料承受温度的急剧变化而不致破坏的能力,又称抗热震性,是陶瓷制品质量高低的重要技术指标之一。通常日用细瓷对热稳定性的要求是制品水中交换温差达到200℃以上,而目前我国实际生产的骨质瓷制品水中交换温差多在140℃以下,即便是优质的骨质瓷水中交换的温差也只有160℃。影响骨质瓷热稳定性的主要因素包括以下四个方面:(1)原料配比的影响。(2)石英粒度的影响。(3)瓷体显微结构的影响。(4)坯釉适应性的影响。众所周知,骨质瓷釉料一般是透明体,不但具有较好的光泽和一定的硬度,而且还可以提高制品的化学稳定性、机械强度和热稳定性。而影响骨质瓷釉料的好坏,提高传统骨质瓷素坯的综合性能成为了亟待解决的问题。
因此,如何改善传统骨质瓷素坯白度低,力学性能及抗热震性差的缺点,以获取更高综合性能的骨质瓷素坯,是其推广与应用于更广阔的领域,满足工业生产需求亟待解决的问题。
发明内容
本发明主要解决的技术问题是:针对传统骨质瓷素坯白度低,力学性能及抗热震性差的缺点,提供了一种高强度骨质瓷素坯。
为了解决上述技术问题,本发明所采用的技术方案是:
一种高强度骨质瓷素坯,是由以下重量份数的原料组成:
牛骨粉末 50~60份
高岭土 25~35份
石英 8~18份
长石 5~12份
添加剂 5~10份
氧化金属混合物 3~8份
氯酸钾 4~7份
分散剂 2~5份
所述添加剂的制备方法为:
将有机粘结剂与碳粉按质量比1:1~1:2混合,搅拌混合后,得添加剂;
所述高强度骨质瓷素坯的制备方法为:
(1)按原料组成称量各组份;
(2)将牛骨粉末,高岭土,石英,长石,氧化金属混合物和氯酸钾加入球磨机中,混合球磨,过筛,得球磨料,将球磨料与水按质量比10:1~12:1混合,并加入添加剂和分散剂,搅拌混合后,得混合料,将混合料除铁过滤,陈腐后,注浆成型,得坯料,将坯料移入烧结炉中,于氮气保护状态下,于温度为400~580℃低温烧结,再于氮气保护状态下,温度为1300~1350℃环境下,高温烧结,随炉冷却至室温后,出料,得高强度骨质瓷素坯。
所述长石为钠长石,钙长石或透长石中任意一种。
所述氧化金属混合物的制备方法为将氧化钙和氧化铝按质量比2:1~1;1混合所得。
所述分散剂为腐殖酸钠,水玻璃或三聚磷酸钠中任意一种。
所述有机粘结剂为桃胶,***胶或羟甲基纤维素钠中任意一种。
所述除铁磁场强度为1.0~1.2万高斯强度。
本发明的有益效果是:
(1)本发明在制备高强度骨质瓷素坯时加入添加剂和氯酸钾,首先,氯酸钾在高温状态下会分解产生氧气,使添加剂中的有机胶粘剂分解,从而产生气体使骨质瓷素坯中的孔隙形成通路,使坯料在烧结过程中,作为粘结剂的玻璃相可均匀分布在骨质瓷素坯中,进而使产品的力学性能和抗热震性得到提高,其次,在添加剂中的有机胶粘剂分解后,碳粉可吸附在孔隙内壁上,在后续通氮气的高温烧结过程中,碳和二氧化硅可在氮气氛围中,在高温条件下生成碳化硅,从而使产品的力学性能进一步提高,并且氯酸钾在高温状态下的分解产物可对产品中空隙进行填充,一定程度上提高的产品的力学性能和白度;
(2)本发明在制备高强度骨质瓷素坯时加入氧化金属混合物,一方面,金属氧化物中的氧化钙可以与体系中的高岭土反应生成钙长石晶相,从而使产品的力学心能进一步提高,另一方面,金属氧化物可在高温条件下被碳还原,从而形成金属单质均匀分布在产品中,从而使产品的热膨胀系数平衡,进而使产品的抗热震性提高,并且还原形成的金属单质铝可在氮气氛围下生成氮化铝对产品体系进行填充,从而使产品的力学性能和白度进一步提高。
具体实施方式
将有机粘结剂与碳粉按质量比1:1~1:2混合加入烧杯中,并将烧杯移入数显测试恒温磁力搅拌器,于温度40~60℃,转速为260~280r/min的条件下,搅拌混合30~45min,得添加剂;按重量份数计,依次称取50~60份牛骨粉末,25~35份高岭土,8~18份石英,5~12份长石,5~10份添加剂,3~8份氧化金属混合物,4~7份氯酸钾和2~5份分散剂,先将将牛骨粉末,高岭土,石英,长石,氧化金属混合物和氯酸钾加入球磨机中,并向球磨机中加入牛骨粉末质量7~8倍的氧化锆球磨珠,球磨混合后,过120~200目筛,得球磨料,将球磨料与水按质量比10:1~12:1混合于反应釜中,并向反应釜中加入依次加入添加剂和分散剂,于温度为45~55℃,转速为240~280r/min的条件下搅拌混合40~60min,得混合料,将混合料移入除铁机,除铁过滤,将除铁过滤后的坯料于室温条件下陈腐18~26h后,注浆成型,得坯料,将坯料移入烧结炉中,向烧结炉中以45~60mL/min的速率向烧杯中通入氮气,待烧结炉内充满氮气后,以20~40℃/min的升温速率将烧结炉内温度升至400~580℃,保温烧结70~100min后,再以15~25℃/min的速率将烧结炉内温度升温至1300~1350℃,保温烧结80~100min后,随炉冷却至室温,出料,得高强度骨质瓷素坯。所述长石为钠长石,钙长石或透长石中任意一种。所述氧化金属混合物的制备方法为将氧化钙和氧化铝按质量比2:1~1;1混合所得。所述分散剂为腐殖酸钠,水玻璃或三聚磷酸钠中任意一种。所述有机粘结剂为桃胶,***胶或羟甲基纤维素钠中任意一种。所述除铁磁场强度为1.0~1.2万高斯强度。
实例1
将有机粘结剂与碳粉按质量比1:2混合加入烧杯中,并将烧杯移入数显测试恒温磁力搅拌器,于温度60℃,转速为280r/min的条件下,搅拌混合45min,得添加剂;按重量份数计,依次称取60份牛骨粉末,35份高岭土,18份石英,12份长石,10份添加剂,8份氧化金属混合物,7份氯酸钾和5份分散剂,先将将牛骨粉末,高岭土,石英,长石,氧化金属混合物和氯酸钾加入球磨机中,并向球磨机中加入牛骨粉末质量8倍的氧化锆球磨珠,球磨混合后,过200目筛,得球磨料,将球磨料与水按质量比12:1混合于反应釜中,并向反应釜中加入依次加入添加剂和分散剂,于温度为55℃,转速为280r/min的条件下搅拌混合60min,得混合料,将混合料移入除铁机,除铁过滤,将除铁过滤后的坯料于室温条件下陈腐26h后,注浆成型,得坯料,将坯料移入烧结炉中,向烧结炉中以60mL/min的速率向烧杯中通入氮气,待烧结炉内充满氮气后,以40℃/min的升温速率将烧结炉内温度升至580℃,保温烧结100min后,再以25℃/min的速率将烧结炉内温度升温至1350℃,保温烧结100min后,随炉冷却至室温,出料,得高强度骨质瓷素坯。所述长石为钠长石。所述氧化金属混合物的制备方法为将氧化钙和氧化铝按质量比1;1混合所得。所述分散剂为腐殖酸钠。所述有机粘结剂为桃胶。所述除铁磁场强度为1.2万高斯强度。
实例2
按重量份数计,依次称取60份牛骨粉末,35份高岭土,18份石英,12份长石,8份氧化金属混合物,7份氯酸钾和5份分散剂,先将将牛骨粉末,高岭土,石英,长石,氧化金属混合物和氯酸钾加入球磨机中,并向球磨机中加入牛骨粉末质量8倍的氧化锆球磨珠,球磨混合后,过200目筛,得球磨料,将球磨料与水按质量比12:1混合于反应釜中,并向反应釜中加入依次加入分散剂,于温度为55℃,转速为280r/min的条件下搅拌混合60min,得混合料,将混合料移入除铁机,除铁过滤,将除铁过滤后的坯料于室温条件下陈腐26h后,注浆成型,得坯料,将坯料移入烧结炉中,向烧结炉中以60mL/min的速率向烧杯中通入氮气,待烧结炉内充满氮气后,以40℃/min的升温速率将烧结炉内温度升至580℃,保温烧结100min后,再以25℃/min的速率将烧结炉内温度升温至1350℃,保温烧结100min后,随炉冷却至室温,出料,得高强度骨质瓷素坯。所述长石为钠长石。所述氧化金属混合物的制备方法为将氧化钙和氧化铝按质量比1;1混合所得。所述分散剂为腐殖酸钠。所述有机粘结剂为桃胶。所述除铁磁场强度为1.2万高斯强度。
实例3
将有机粘结剂与碳粉按质量比1:2混合加入烧杯中,并将烧杯移入数显测试恒温磁力搅拌器,于温度60℃,转速为280r/min的条件下,搅拌混合45min,得添加剂;按重量份数计,依次称取60份牛骨粉末,35份高岭土,18份石英,12份长石,10份添加剂,8份氧化金属混合物和5份分散剂,先将将牛骨粉末,高岭土,石英,长石,氧化金属混合物加入球磨机中,并向球磨机中加入牛骨粉末质量8倍的氧化锆球磨珠,球磨混合后,过200目筛,得球磨料,将球磨料与水按质量比12:1混合于反应釜中,并向反应釜中加入依次加入添加剂和分散剂,于温度为55℃,转速为280r/min的条件下搅拌混合60min,得混合料,将混合料移入除铁机,除铁过滤,将除铁过滤后的坯料于室温条件下陈腐26h后,注浆成型,得坯料,将坯料移入烧结炉中,向烧结炉中以60mL/min的速率向烧杯中通入氮气,待烧结炉内充满氮气后,以40℃/min的升温速率将烧结炉内温度升至580℃,保温烧结100min后,再以25℃/min的速率将烧结炉内温度升温至1350℃,保温烧结100min后,随炉冷却至室温,出料,得高强度骨质瓷素坯。所述长石为钠长石。所述氧化金属混合物的制备方法为将氧化钙和氧化铝按质量比1;1混合所得。所述分散剂为腐殖酸钠。所述有机粘结剂为桃胶。所述除铁磁场强度为1.2万高斯强度。
实例4
将有机粘结剂与碳粉按质量比1:2混合加入烧杯中,并将烧杯移入数显测试恒温磁力搅拌器,于温度60℃,转速为280r/min的条件下,搅拌混合45min,得添加剂;按重量份数计,依次称取60份牛骨粉末,35份高岭土,18份石英,12份长石,10份添加剂,7份氯酸钾和5份分散剂,先将将牛骨粉末,高岭土,石英,长石和氯酸钾加入球磨机中,并向球磨机中加入牛骨粉末质量8倍的氧化锆球磨珠,球磨混合后,过200目筛,得球磨料,将球磨料与水按质量比12:1混合于反应釜中,并向反应釜中加入依次加入添加剂和分散剂,于温度为55℃,转速为280r/min的条件下搅拌混合60min,得混合料,将混合料移入除铁机,除铁过滤,将除铁过滤后的坯料于室温条件下陈腐26h后,注浆成型,得坯料,将坯料移入烧结炉中,向烧结炉中以60mL/min的速率向烧杯中通入氮气,待烧结炉内充满氮气后,以40℃/min的升温速率将烧结炉内温度升至580℃,保温烧结100min后,再以25℃/min的速率将烧结炉内温度升温至1350℃,保温烧结100min后,随炉冷却至室温,出料,得高强度骨质瓷素坯。所述长石为钠长石。所述分散剂为腐殖酸钠。所述有机粘结剂为桃胶。所述除铁磁场强度为1.2万高斯强度。
对比例:唐山某瓷业有限公司生产的骨质瓷素坯。
将实例1至4所得的高强度骨质瓷素坯及对比例产品进行性能检测,具体检测方法如下:
1.力学性能:选取长宽合适的试件,每组两个,单面施釉,做烧成样品抗折强度测试。先调整好试验机和抗折活动支架跨距;将试样长条平放在支架上,保证试样两端面与下支辊的距离相同,施压点放在1/2L处,与支架平行;试验时,按下开始按钮,试验机以均匀平稳的速度均匀加荷,直至试件折断;记录最大破坏荷重P0(N),试件的抗折强度按公式(1)计算,结果精确到0.01,取每组两个试样的平均值,记录结果。
P1=3P0LK/(2bh2)
式中:P1—抗折强度,kg/cm2;
P0—折断荷重,N;
L—两支承点跨距,等于6cm;
b—试件宽度,cm;
h—试件高度,cm;
2.抗热震性:按照GB/T13522对试件抗热震性进行检测,检测热交换一次不裂温度;
3.白度:按照GB/T13522对试件白度进行检测。
具体检测结果如表1所示:
表1
检测项目 | 实例1 | 实例2 | 实例3 | 实例4 | 对比例 |
抗折强度/(kg/cm2) | 1377.1 | 1158.6 | 1203.4 | 1083.9 | 795.4 |
热交换一次不裂温度/℃ | 210℃~20℃ | 185℃~20℃ | 193℃~20℃ | 180℃~20℃ | 140℃~20℃ |
白度 | 93.1 | 89.5 | 90.2 | 88.3 | 80.47 |
由表1检测结果可知,本发明技术方案制备的高强度骨质瓷素坯具有优异的力学性能及抗热震性的特点,同时其白度较传统骨质瓷素坯显著提高,在瓷器行业的发展中具有广阔的前景。
Claims (6)
1.一种高强度骨质瓷素坯,其特征在于:是由以下重量份数的原料组成:
牛骨粉末 50~60份
高岭土 25~35份
石英 8~18份
长石 5~12份
添加剂 5~10份
氧化金属混合物 3~8份
氯酸钾 4~7份
分散剂 2~5份
所述添加剂的制备方法为:
将有机粘结剂与碳粉按质量比1:1~1:2混合,搅拌混合后,得添加剂;
所述高强度骨质瓷素坯的制备方法为:
(1)按原料组成称量各组份;
(2)将牛骨粉末,高岭土,石英,长石,氧化金属混合物和氯酸钾加入球磨机中,混合球磨,过筛,得球磨料,将球磨料与水按质量比10:1~12:1混合,并加入添加剂和分散剂,搅拌混合后,得混合料,将混合料除铁过滤,陈腐后,注浆成型,得坯料,将坯料移入烧结炉中,于氮气保护状态下,于温度为400~580℃低温烧结,再于氮气保护状态下,温度为1300~1350℃环境下,高温烧结,随炉冷却至室温后,出料,得高强度骨质瓷素坯。
2.根据权利要求1所述的一种高强度骨质瓷素坯,其特征在于:所述长石为钠长石,钙长石或透长石中任意一种。
3.根据权利要求1所述的一种高强度骨质瓷素坯,其特征在于:所述氧化金属混合物的制备方法为将氧化钙和氧化铝按质量比2:1~1;1混合所得。
4.根据权利要求1所述的一种高强度骨质瓷素坯,其特征在于:所述分散剂为腐殖酸钠,水玻璃或三聚磷酸钠中任意一种。
5.根据权利要求1所述的一种高强度骨质瓷素坯,其特征在于:所述有机粘结剂为桃胶,***胶或羟甲基纤维素钠中任意一种。
6.根据权利要求1所述的一种高强度骨质瓷素坯,其特征在于:所述除铁磁场强度为1.0~1.2万高斯强度。
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