WO2012003792A1 - Medium-low temperature sintered fine bone china and manufacturing method thereof - Google Patents

Medium-low temperature sintered fine bone china and manufacturing method thereof Download PDF

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WO2012003792A1
WO2012003792A1 PCT/CN2011/076837 CN2011076837W WO2012003792A1 WO 2012003792 A1 WO2012003792 A1 WO 2012003792A1 CN 2011076837 W CN2011076837 W CN 2011076837W WO 2012003792 A1 WO2012003792 A1 WO 2012003792A1
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bone
temperature
firing
china
bone china
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PCT/CN2011/076837
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Chinese (zh)
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江伟辉
苗立锋
包镇红
谭训彦
虞澎澎
刘健敏
朱庆霞
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景德镇陶瓷学院
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Priority to CN2010102229445A priority patent/CN101891455B/en
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Publication of WO2012003792A1 publication Critical patent/WO2012003792A1/en

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Abstract

The present invention relates to a medium-low temperature sintered fine bone china and a manufacturing method thereof. The chemical composition of the china is: SiO2 52–60%, Al2O3 28–37%, K2O 1–4%, Na2O 1–2%, CaO 3–8%, MgO 1–3%, and P2O5 1–3%; the materials used are: bone ash 3–8%, kaolin 32–45%, aluminum oxide 10–20%, and frit 35–50%, while the sintering temperature is between 1170°C–1250°C. A "high temperature bisque firing, low temperature glaze firing" or a "low temperature bisque firing, high temperature glaze firing" dual pass firing technique can be used; a high temperature single pass firing technique can also be used. The fine bone china of the present invention has the visual effect of traditional bone china, improved physical and chemical properties over bone china, and the advantages of a lower bone char usage and a lower firing temperature to enable lower production costs and energy consumption.

Description

一种中低温烧结精骨瓷及其生产方法  Medium and low temperature sintered bone china and production method thereof 技术领域Technical field
本发明属于日用陶瓷制造技术领域,具体涉及一种中低温烧结精骨瓷及其生产方法。 The invention belongs to the technical field of daily-use ceramics manufacturing, and particularly relates to a medium-low temperature sintered bone china and a production method thereof.
背景技术Background technique
骨质瓷是18世纪英国人发明的一种软质瓷,它以骨碳为主,加入部分粘土、长石、石英等矿物原料,采用高温素烧(1250℃~1280℃)、低温釉烧(1100℃~1150℃)的二次烧成工艺烧制而成。骨质瓷具有白度高、透光度好、瓷质细腻等突出优点,是举世公认的高档日用细瓷。我国20世纪70年代研究和开发了部分骨质瓷产品,到20世纪80年代以后,我国的唐山、淄博、景德镇和潮州等地区先后进行了批量生产。 Bone china is a kind of soft porcelain invented by British people in the 18th century. It is mainly made of bone carbon. It is added with mineral materials such as clay, feldspar and quartz. It is burnt with high temperature (1250 ° C ~ 1280 ° C) and low temperature glaze. (1100 ° C ~ 1150 ° C) secondary firing process is fired. Bone china has outstanding advantages such as high whiteness, good transparency and fine porcelain. It is recognized as a high-grade daily-use fine porcelain. In the 1970s, China studied and developed some bone china products. After the 1980s, China's Tangshan, Zibo, Jingdezhen and Chaozhou regions successively carried out mass production.
然而,骨质瓷也存在以下一些固有的缺点:1)热稳定性差,骨质瓷热稳定性的国家标准是140℃~20℃热交换一次不裂,远低于日用细瓷180℃~20℃热交换一次不裂的标准,这是由于骨质瓷的主晶相磷酸钙和钙长石的热膨胀系数较高造成的;2)烧成范围窄,其原因是骨质瓷的组成位于磷酸三钙、钙长石和石英的三元最低共熔点(1290℃)附近,当温度低于最低共熔点时,瓷坯中液量很少,制品无法烧结,而温度达到或高于最低共熔点时,大量液相同时产生,导致产品极易软化变形,因此,烧成难以控制,这也是骨质瓷通常必须采用二次烧成工艺(通过仿型匣钵进行高温素烧和低温釉烧)的原因;3)釉面硬度低,其根源是采用了适合于低温釉烧的熔块釉;4)坯料成本高,传统骨质瓷坯料中骨碳的用量一般为40~60%,由于使用骨碳的价格高,导致骨质瓷坯料成本居高不下。随着我国骨质瓷生产规模的扩大,骨碳的需求量不断攀升,导致骨碳供应紧张,价格上涨,这直接影响到骨质瓷的进一步发展。 However, bone china also has some inherent disadvantages: 1) poor thermal stability, the national standard for thermal stability of bone china is 140 ° C ~ 20 ° C heat exchange once crack, far lower than daily fine porcelain 180 ° C ~ The standard of heat exchange at 20 °C is not caused by the high thermal expansion coefficient of the main crystal phase calcium phosphate and anorthite of bone china; 2) the range of firing is narrow, because the composition of bone china is located The ternary minimum eutectic point (1290 ° C) of tricalcium phosphate, anorthite and quartz. When the temperature is lower than the lowest eutectic point, the amount of liquid in the porcelain blank is small, the product cannot be sintered, and the temperature reaches or exceeds the lowest eutectic point. At the same time, a large amount of liquid phase is generated at the same time, which causes the product to be easily softened and deformed. Therefore, it is difficult to control the firing. This is also the case that the bone china usually has to be subjected to a secondary firing process (high temperature gas burning and low temperature glaze burning through a profiled concrete). 3) The glaze hardness is low, the root source is the frit glaze suitable for low temperature glaze burning; 4) the billet cost is high, the amount of bone carbon in the traditional bone china billet is generally 40-60%, due to the use The high price of bone carbon leads to the cost of bone china billet Stubbornly high. With the expansion of China's bone china production scale, the demand for bone carbon continues to rise, leading to tight bone carbon supply and rising prices, which directly affects the further development of bone china.
因此,降低骨质瓷坯料的骨碳用量,开发具有骨质瓷外观效果的新瓷种,这是骨质瓷发展的一种战略选择。20世纪80年代,日本陶瓷工作者部分使用,甚至不使用骨碳,研发了外观质量接近骨质瓷的陶瓷产品,这类产品透光度好、色调柔和,称为“新骨瓷”。20世纪90年代以来,我国也逐步开展了这类产品的研发。减少骨碳用量通常采用的技术路线有两种,其一是用天然磷灰石作原料代替骨碳。CN1072916A公开了一种利用磷灰石生产骨灰瓷的工艺方法,以磷灰石全部代替骨碳,采用传统高温素烧(1240℃~1260℃)、低温釉烧两次烧成工艺,其配方组成为:磷灰石35~60%、滑石2~5%、石英10~15%、长石8~13%。减少骨碳用量的另一种技术路线就是增加石英、瓷石以及氧化铝来减少骨碳用量。ZL95112612.1公开了一种“强化骨灰瓷”的生产工艺,它通过大幅提高石英和石英玻璃的用量来实现降低骨碳用量,其配方组成为:骨灰或磷灰石用量5~15%、硅灰石5~15%、石英30~40%、石英玻璃10~20%、粘土20~25%、增塑剂1~5%、滑石1~4%,其主要晶相为α-方石英,次晶相为β-Ca3(PO4)2、钙长石和硅灰石,烧成温度为1220℃~1300℃。ZL200610031882.3公开的一种“新型骨灰瓷及其生产方法”则是采用大量的瓷石和少量氧化铝粉,其配方组成为:骨灰5~10%、高岭25~35%、瓷石45~60%、铝粉5~10%,其主晶相为莫来石,次晶相为β-Ca3(PO4)2和钙长石,烧成温度为1230℃~1300℃,氧化焰中烧成。大量应用氧化铝粉降低骨碳用量的是ZL200610034842.4公开的一种骨质强化瓷及其生产工艺,其配方组成为:合成骨粉8~12%、α-氧化铝粉20~25%、龙岩洗泥45~50%、湖南长石13~15%,贵州粘土5~8%,烧成温度为1260℃~1280℃。CN1210833A公开了一种新骨质瓷及其生产方法:在长石质瓷配方基础上加入2~10%的骨灰,烧成温度为1325℃~1340℃。Therefore, reducing the amount of bone carbon in bone china billets and developing new porcelains with the appearance of bone china is a strategic choice for the development of bone china. In the 1980s, Japanese ceramic workers used part or not even using bone carbon to develop ceramic products with an appearance quality close to that of bone china. These products have good transparency and soft color and are called "new bone china". Since the 1990s, China has gradually developed research and development of such products. There are two technical routes that are commonly used to reduce bone carbon consumption. One is to use natural apatite as a raw material instead of bone carbon. CN1072916A discloses a process for producing bone ash porcelain by using apatite, which replaces bone carbon with apatite, adopts traditional high temperature smoldering (1240 ° C ~ 1260 ° C), low temperature glaze firing twice, and its formulation composition It is: 35 to 60% of apatite, 2 to 5% of talc, 10 to 15% of quartz, and 8 to 13% of feldspar. Another technical route to reduce bone carbon usage is to increase quartz, porcelain, and alumina to reduce bone carbon usage. ZL95112612.1 discloses a production process of “reinforcing the ashes porcelain”, which achieves a reduction in the amount of bone carbon by substantially increasing the amount of quartz and quartz glass. The composition of the composition is: 5 to 15% of the amount of ashes or apatite, silicon 5 to 15% of limestone, 30 to 40% of quartz, 10 to 20% of quartz glass, 20 to 25% of clay, 1 to 5% of plasticizer, and 1 to 4% of talc. The main crystal phase is α-cristobalite. The secondary phase is β-Ca 3 (PO 4 ) 2 , anorthite and wollastonite, and the firing temperature is 1220 ° C to 1300 ° C. ZL200610031882.3 discloses a "new type of bone ash porcelain and its production method" which uses a large amount of porcelain stone and a small amount of alumina powder, and its formulation composition is: 5-10% of ashes, 25-35% of kaolin, 45~ of porcelain stone 60%, aluminum powder 5-10%, the main crystal phase is mullite, the secondary crystal phase is β-Ca 3 (PO 4 ) 2 and anorthite, and the firing temperature is 1230 ° C ~ 1300 ° C, in the oxidizing flame Burnt. A large number of applications of alumina powder to reduce the amount of bone carbon is a bone-reinforced porcelain disclosed in ZL200610034842.4 and its production process, and its formulation composition is: synthetic bone powder 8-12%, α-alumina powder 20-25%, Longyan 45 to 50% of washing mud, 13 to 15% of Hunan feldspar, 5 to 8% of Guizhou clay, and firing temperature of 1260 ° C to 1280 ° C. CN1210833A discloses a new bone china and a production method thereof: 2 to 10% of ashes are added on the basis of the feldspar porcelain formula, and the firing temperature is 1325 ° C to 1340 ° C.
技术问题technical problem
本发明的目的在于克服现有骨质瓷存在的固有缺点,提供一种中低温烧结精骨瓷及其生产方法。本发明通过配方设计和工艺优化,进一步减少了骨碳用量,骨碳含量仅为3~8%,烧成温度降至1170℃~1250℃,克服了传统骨质瓷烧成温度范围窄、容易变形等缺点,瓷质达到了骨质瓷的外观效果,而且理化性能优于骨质瓷。正是由于本发明的骨质瓷所用骨碳量少而性能好,达到了“少而精”的目标,因此本发明的骨质瓷又称为“精骨瓷”。 The object of the present invention is to overcome the inherent disadvantages of the existing bone china, and to provide a medium-low temperature sintered bone china and a production method thereof. The invention further reduces the amount of bone carbon by formula design and process optimization, the bone carbon content is only 3 to 8%, and the firing temperature is lowered to 1170 ° C to 1250 ° C, which overcomes the narrow range of the traditional bone china firing temperature and is easy. Disadvantages such as deformation, porcelain has achieved the appearance of bone china, and physical and chemical properties are better than bone china. It is because the bone china of the present invention has a small amount of bone carbon and has good performance, and achieves the goal of "small and fine". Therefore, the bone china of the present invention is also called "fine bone china".
技术解决方案Technical solution
本发明提供的一种中低温烧结精骨瓷,其特征在于其化学组成按重量比为:SiO252~60%,Al2O328~37%,K2O1~4%,Na2O1~2%,CaO 3~8%,MgO1~3%,P2O51~3%,根据瓷坯的化学组成得出的坯式如下:
Figure PCTCN2011076837-appb-M000001
The invention provides a medium-low temperature sintered bone china, characterized in that the chemical composition is by weight: SiO 2 52-60%, Al 2 O 3 28-37%, K 2 O1 ~ 4%, Na 2 O1 ~2%, CaO 3 to 8%, MgO1 to 3%, P 2 O 5 1 to 3%, and the blank form obtained from the chemical composition of the porcelain blank is as follows:
Figure PCTCN2011076837-appb-M000001
精骨瓷的主晶相为莫来石,次晶相为钙长石,它不但保持了传统骨质瓷透光度好、瓷质细腻、高雅洁白等特点,而且理化性能如热稳定性、釉面硬度以及热膨胀系数优于骨质瓷。 The main crystalline phase of Jing Gu Porcelain is mullite, and the secondary crystalline phase is anorthite. It not only maintains the good transparency of traditional bone china, fine porcelain, elegant whiteness, but also physical and chemical properties such as thermal stability. The glaze hardness and coefficient of thermal expansion are superior to those of bone china.
本发明提供的中低温烧结精骨瓷既可以采用传统骨质瓷“高温素烧、低温釉烧”或“低温素烧、高温釉烧”的二次烧成工艺,也可以像普通日用细瓷那样应用高温一次烧成工艺,其特征在于所用的原料配方按重量比为:骨灰3~8%、高岭土32~45%、氧化铝10~20%、熔块35~50%,所用的熔块的化学组成为:SiO275~85%,Al2O35~9%,CaO3~7%,MgO2~6%,K2O2~4%,Na2O1~3%;烧结温度范围为1170℃~1250℃。 The medium and low temperature sintered bone china provided by the invention can adopt the secondary firing process of the traditional bone china "high temperature burning, low temperature glaze burning" or "low temperature burning, high temperature glaze burning", or can be like ordinary daily fine The high-temperature one-time firing process is applied to porcelain, which is characterized in that the raw material formula used is by weight: 3 to 8% of ashes, 32 to 45% of kaolin, 10 to 20% of alumina, 35 to 50% of frit, and the melting used. The chemical composition of the block is: SiO 2 75 to 85%, Al 2 O 3 5 to 9%, CaO 3 to 7%, MgO 2 to 6%, K 2 O 2 to 4%, Na 2 O1 to 3%; sintering temperature range is 1170 ° C ~ 1250 ° C.
李家驹主编的《陶瓷工艺学》(中国轻工业出版社出版,2001年第1版,P98)给出的骨质瓷坯料配方为:骨灰20~60%、长石8~22%、高岭土25~45%、石英9~20%,与此相比,本发明的精骨瓷坯料配方有三个突出特点:一是骨灰用量少,二是用氧化铝取代石英,三是不用长石而采用熔块作熔剂。 The formula of bone china blanks given by Li Jiaxuan's "Ceramics Technology" (published by China Light Industry Press, 2001, 1st edition, P98): 20-60% ashes, 8-22% feldspar, 25-45 kaolin %, quartz 9-20%, compared with this, the refined bone china blank formula of the present invention has three outstanding features: one is the use of less ash, the second is to replace quartz with alumina, and the third is to use frit without feldspar Used as a flux.
本发明中的氧化铝粉加入量是非常关键的,如果像ZL200610031882.3那样只加入5~10%的氧化铝粉,则其改性效果不佳;反之,如果像ZL200610031882.3那样加入20~25%的氧化铝粉,则不但会明显提高坯体的烧成温度,而且还会显著降低瓷坯的透光性能,结果就根本达不到传统骨质瓷的透光效果。 The addition amount of the alumina powder in the present invention is very critical. If only 5 to 10% of alumina powder is added as in ZL200610031882.3, the modification effect is not good; otherwise, if it is added as in ZL200610031882.3, 20~ 25% alumina powder will not only significantly increase the firing temperature of the green body, but also significantly reduce the light transmission performance of the porcelain blank. As a result, the light transmission effect of the traditional bone china cannot be achieved at all.
本发明在坯体配方中引入10~20%氧化铝粉为改性剂,一方面可以提高瓷胎强度、白度和热稳定性,另一方面又可以扩大瓷坯烧结范围和减小坯体高温变形度。Al2O3颗粒本身的强度高,它单独存在时,可以均匀地分布在瓷胎中起到颗粒弥散增强的作用,提高坯体的抗高温变形性能。部分Al2O3颗粒还可以和由高岭土脱水分解后所产生的SiO2反应,结果生成机械强度高、膨胀系数小的莫来石晶体,这对提高瓷胎强度和热稳定性是十分有利的。部分Al2O3颗粒在高温下溶入瓷坯的液相中,可提高液相的高温粘度,有利于扩大坯体的烧成范围。 The invention introduces 10-20% alumina powder into the blank formula as a modifier, on the one hand, can improve the strength, whiteness and thermal stability of the porcelain tire, on the other hand, it can enlarge the sintering range of the porcelain blank and reduce the green body. High temperature deformation. The Al 2 O 3 particles themselves have high strength, and when they are present alone, they can be uniformly distributed in the ceramic tire to enhance the dispersion of the particles, and improve the high temperature deformation resistance of the green body. Part of the Al 2 O 3 particles can also react with SiO 2 produced by dehydration and decomposition of kaolin, resulting in mullite crystals having high mechanical strength and small expansion coefficient, which is very advantageous for improving the strength and thermal stability of the ceramic tire. . Part of the Al 2 O 3 particles are dissolved in the liquid phase of the porcelain billet at a high temperature, which can increase the high temperature viscosity of the liquid phase, and is advantageous for enlarging the firing range of the green body.
本发明的一个突出创新之处在于坯料中引入了熔块而不是采用长石作为熔剂。本发明的熔块与长石相比,其化学组成有两个显著特点。第一个特点是熔块的SiO2含量高达75~85%,比长石63~71%的含硅量高得多,这就使得本发明的熔块的高温粘度比长石熔体的粘度高得多,而且随着温度的升高,熔块高温粘度的变化比长石熔体小,因此使用本发明的熔块作熔剂比应用长石更有利于扩大坯体的烧成范围。高SiO2含量的熔块在骨质瓷坯中还发挥着两个重要作用:一是高硅熔块热膨胀系数小,有利于降低骨质瓷的热膨胀系数,提高骨质瓷的热稳定性能;二是高硅熔块具有透明度高和机械强度大的优点,有利于提高骨质瓷的透光度和力学性能。本发明的熔块具有的第二个特点是熔块的化学组成同时含有碱金属和碱土金属氧化物,利用两者的协同助熔作用可使坯体的烧成温度大为降低,而使用长石作为熔剂,由于长石只含有碱金属氧化物,因此其助熔作用就不及本发明的熔块。 An outstanding innovation of the present invention is the introduction of a frit in the blank rather than the use of feldspar as a flux. Compared with feldspar, the frit of the present invention has two distinct characteristics in its chemical composition. The first feature is that the SiO 2 content of the frit is as high as 75-85%, which is much higher than that of the feldspar 63-71%, which makes the high temperature viscosity of the frit of the present invention higher than that of the feldspar melt. It is much higher, and as the temperature increases, the viscosity of the frit changes less than that of the feldspar melt. Therefore, the use of the frit of the present invention as a flux is more advantageous than the application of feldspar to enlarge the firing range of the green body. The high SiO 2 content frit also plays two important roles in the bone china blank: First, the high silicon frit has a small thermal expansion coefficient, which is beneficial to lowering the thermal expansion coefficient of the bone china and improving the thermal stability of the bone china; Second, the high silicon frit has the advantages of high transparency and high mechanical strength, which is beneficial to improve the transparency and mechanical properties of the bone china. The second characteristic of the frit of the present invention is that the chemical composition of the frit contains both an alkali metal and an alkaline earth metal oxide, and the synergistic fluxing effect of the two can greatly reduce the firing temperature of the green body. Stone acts as a flux, and since feldspar contains only an alkali metal oxide, its fluxing effect is inferior to that of the present invention.
本发明的精骨瓷中虽然骨碳含量降至3~8%,但是它仍能保持骨质瓷的透光度好、瓷质细腻、高雅洁白等特点。如果像CN1072916A那样完全不用骨碳,则瓷坯的质感就大打折扣,结果就失去了骨质瓷的外观效果。 Although the bone carbon content of the bone china of the invention is reduced to 3 to 8%, it can maintain the good transparency of the bone china, the fine porcelain, and the elegant whiteness. If bone carbon is not used at all like CN1072916A, the texture of the porcelain blank is greatly reduced, and as a result, the appearance of the bone china is lost.
传统骨质瓷的主晶相为β-Ca3(PO4)2和钙长石,由于主晶相的膨胀系数较大,因此骨质瓷的膨胀系数高达8.0~8.5×10-6/℃(RT~500℃),导致骨质瓷的热稳定性较差;本发明的精骨瓷的主晶相为莫来石,次晶相为钙长石,由于莫来石的膨胀系数较小,这就使得精骨瓷的膨胀系数较低,其值为4.5~5.2×10-6/℃(RT~500℃),因此,精骨瓷具有热稳定性好的优点,精骨瓷经200℃~20℃热交换一次不裂。 The main crystal phase of traditional bone china is β-Ca 3 (PO 4 ) 2 and anorthite. Since the expansion coefficient of the main crystal phase is large, the expansion coefficient of bone china is as high as 8.0-8.5×10 -6 /°C. (RT ~ 500 ° C), resulting in poor thermal stability of bone china; the main crystal phase of the bone china of the present invention is mullite, the secondary crystal phase is anorthite, due to the small expansion coefficient of mullite This makes the bone expansion coefficient of the bone china low, the value is 4.5 ~ 5.2 × 10 -6 / ° C (RT ~ 500 ° C), therefore, the fine bone porcelain has the advantage of good thermal stability, the bone china 200 The heat exchange at °C ~ 20 °C does not crack once.
有益效果Beneficial effect
本发明的中低温烧结精骨瓷与现有骨质瓷相比有三个明显的优势:一是烧结温度低,烧结温度范围为1170℃~1250℃,而且可以一次高温烧成,与传统骨质瓷的烧结范围1220℃~1280℃和二次烧成工艺相比,显著降低了能耗,同时还有利于提高窑炉的使用寿命;二是骨碳用量少,仅为3~8%,精骨瓷保持了传统骨质瓷透光度好、瓷质细腻、高雅洁白等特点,大大降低了骨质瓷的原料成本,对扩大骨质瓷的生产和应用具有重要意义;三是理化性能好,优化的氧化铝粉用量使精骨瓷不但透光性能好,而且其机械强度和热稳定性均优于骨质瓷。 The medium-low temperature sintered bone china of the invention has three distinct advantages compared with the existing bone china: first, the sintering temperature is low, the sintering temperature ranges from 1170 ° C to 1250 ° C, and can be fired at a high temperature, and the traditional bone quality Compared with the secondary firing process, the sintering range of porcelain 1220 ° C ~ 1280 ° C significantly reduces energy consumption, and is also conducive to improving the service life of the furnace; second, the amount of bone carbon is small, only 3 to 8%. Fine bone porcelain maintains the characteristics of traditional bone china with good transparency, fine porcelain, elegant whiteness, etc., which greatly reduces the raw material cost of bone china, and is of great significance for expanding the production and application of bone china. Third, physical and chemical properties Well, the optimized amount of alumina powder makes the bone china not only good in light transmission, but also superior in mechanical strength and thermal stability to bone china.
本发明的最佳实施方式BEST MODE FOR CARRYING OUT THE INVENTION
实施例1:按坯料配方称取各种原料:骨灰5%,高岭40%,氧化铝粉13%,熔块42%。坯料的化学组成为:SiO256.48%,Al2O331.06%,Fe2O30.12%,CaO 5.44%,MgO 1.93%,K2O 1.96%,Na2O 0.87%,P2O5 2.13%,熔块的化学组成为:SiO280.65%,Al2O3 5.29%,CaO 5.69%,MgO 4.27%,K2O 2.10%,Na2O 1.92%。将上述原料投入球磨机内,混合球磨至所要求的细度(塑性泥要求细度为<10μm占75~80%,注浆泥要求细度为<10μm占75左右)。然后,依次进行过筛、除铁、压滤、练泥、陈腐、成型,然后在1190℃~1220℃ 素烧,素烧坯体经抛光捡选后施熔块釉,再在1190℃~1220℃ 釉烧,最后得到精骨瓷。如果是采用一次烧成工艺,那么坯体成型后施生料釉,然后在1190℃~1220℃ 温度下烧成即可。 Example 1: Various raw materials were weighed according to the blank formulation: ash of ash, 40% of kaolin, 13% of alumina powder, and 42% of frit. The chemical composition of the billet is: SiO 2 56.48%, Al 2 O 3 31.06%, Fe 2 O 3 0.12%, CaO 5.44%, MgO 1.93%, K 2 O 1.96%, Na 2 O 0.87%, P 2 O 5 2.13 %, the chemical composition of the frit is: SiO 2 80.65%, Al 2 O 3 5.29%, CaO 5.69%, MgO 4.27%, K 2 O 2.10%, Na 2 O 1.92%. The above-mentioned raw materials are put into a ball mill, and the ball mill is mixed to the required fineness (the required fineness of the plastic mud is <10 μm, 75 to 80%, and the fineness of the grouting mud is <10 μm, which is about 75). Then, sieving, iron removal, pressure filtration, mud, stale, molding, and then burning at 1190 ° C ~ 1220 ° C, the sintered body is polished and selected, then the frit glaze is applied, and then at 1190 ° C ~ 1220 °C glaze burn, and finally get the bone china. If a single firing process is used, the glaze is applied after the green body is formed, and then fired at a temperature of 1190 ° C to 1220 ° C.
本发明的实施方式Embodiments of the invention
实施例2:按坯料配方称取各种原料:骨灰3%,高岭43%,氧化铝粉17%,熔块37%,坯料的化学组成为:SiO2 53.69%,Al2O3 37.07%,Fe2O3 0.13%,CaO 3.29%,MgO 1.12%,K2O 2.40%,Na2O 1.03%,P2O5 1.27%,熔块的化学组成为:SiO2 79.41%,Al2O3 8.10%,CaO 3.87%,MgO 2.64%,K2O 3.33%,Na2O 2.57%。将上述原料投入球磨机内,混合球磨至所要求的细度(塑性泥要求细度为<10μm占75~80%,注浆泥要求细度为<10μm占75左右)。然后,依次进行过筛、除铁、压滤、练泥、陈腐、成型,然后在1200℃~1250℃素烧,素烧坯体经抛光捡选后施熔块釉,再在1100℃~1130℃釉烧,最后得到精骨瓷。如果是采用一次烧成工艺,那么坯体成型后施生料釉,然后在1200℃~1250℃温度下烧成即可。Example 2: Various raw materials were weighed according to the blank formula: ash 3%, kaolin 43%, alumina powder 17%, frit 37%, and the chemical composition of the billet: SiO 2 53.69%, Al 2 O 3 37.07% , Fe 2 O 3 0.13%, CaO 3.29%, MgO 1.12%, K 2 O 2.40%, Na 2 O 1.03%, P 2 O 5 1.27%, chemical composition of the frit: SiO 2 79.41%, Al 2 O 3 8.10%, CaO 3.87%, MgO 2.64%, K 2 O 3.33%, Na 2 O 2.57%. The above-mentioned raw materials are put into a ball mill, and the ball mill is mixed to the required fineness (the required fineness of the plastic mud is <10 μm, 75 to 80%, and the fineness of the grouting mud is <10 μm, which is about 75). Then, sieving, iron removal, pressure filtration, grinding mud, stale, molding, and then firing at 1200 °C ~ 1250 °C, the sintered body is polished and selected, then the frit glaze is applied, and then at 1100 °C ~ 1130 The glaze is burned at °C, and finally the bone china is obtained. If a single firing process is used, the glaze is applied after the green body is formed, and then fired at a temperature of 1200 ° C to 1250 ° C.
[根据细则26改正29.07.2011] 本发明的实施方式 [Correct according to Rule 26 29.07.2011] Embodiments of the present invention
实施例3:按坯料配方称取各种原料:骨灰7%,高岭35%,氧化铝粉11%,熔块47%。坯料的化学组成为:SiO2 56.14%,Al2O3 28.00%,Fe2O30.12%,CaO 7.12%,MgO 2.33%,K2O 2.15%,Na2O 1.14%,P2O5 2.99%,熔块的化学组成为:SiO2 77.42%,Al2O3 6.74%,CaO 6.15%,MgO 4.72%,K2O 2.57%,Na2O 2.31%。烧成温度1170℃~1200℃,其它生产工艺与实施例2相同。Example 3: Various raw materials were weighed according to the blank formulation: ash of ash, 35% of kaolin, 11% of alumina powder, and 47% of frit. The chemical composition of the billet is: SiO 2 56.14%, Al 2 O 3 28.00%, Fe 2 O 3 0.12%, CaO 7.12%, MgO 2.33%, K 2 O 2.15%, Na 2 O 1.14%, P 2 O 5 2.99 %, the chemical composition of the frit is: SiO 2 77.42%, Al 2 O 3 6.74%, CaO 6.15%, MgO 4.72%, K 2 O 2.57%, Na 2 O 2.31%. The firing temperature was 1170 ° C to 1200 ° C, and the other production processes were the same as in Example 2.
工业实用性Industrial applicability
由上述各实施例所制得的精骨瓷性能如下表:
Figure PCTCN2011076837-appb-I000001
The performance of the fine bone china prepared by the above various examples is as follows:
Figure PCTCN2011076837-appb-I000001

Claims (2)

1.一种中低温烧结精骨瓷,其特征在于其化学组成按重量比为:SiO2 52~60%,Al2O328~37%,K2O 1~4%,Na2O 1~2%,CaO 3~8%,MgO 1~3%,P2O51~3%;其主晶相为莫来石,次晶相为钙长石。 A medium-low temperature sintered bone china characterized by a chemical composition of SiO 2 52-60%, Al 2 O 3 28-37%, K 2 O 1-4%, Na 2 O 1 ~2%, CaO 3 to 8%, MgO 1 to 3%, P 2 O 5 1 to 3%; the main crystalline phase is mullite, and the secondary crystalline phase is anorthite.
2.一种生产如权利要求1所述中低温烧结精骨瓷的方法,包括采用高温素烧、低温釉烧或低温素烧、高温釉烧的二次烧成工艺,或采用高温一次烧成工艺,其特征在于所用的原料配方按重量比为:骨灰3~8%、高岭土32~45%、氧化铝10~20%、熔块35~50%,其中所述熔块的化学组成为:SiO2 75~85%,Al2O3 5~9%,CaO 3~7%,MgO 2~6%,K2O 2~4%,Na2O 1~3%;烧结温度为1170℃~1250℃。2. A method for producing a low-temperature sintered bone china according to claim 1, comprising a secondary firing process using a high temperature sinter, a low temperature glaze or a low temperature sinter, a high temperature glaze, or a high temperature firing The process is characterized in that the raw material formula used is in the weight ratio: 3 to 8% of ashes, 32 to 45% of kaolin, 10 to 20% of alumina, and 35 to 50% of frits, wherein the chemical composition of the frit is: SiO 2 75 to 85%, Al 2 O 3 5 to 9%, CaO 3 to 7%, MgO 2 to 6%, K 2 O 2 to 4%, Na 2 O 1 to 3%; sintering temperature is 1170 ° C - 1250 ° C.
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