CN109956747B - 红色氧化锆烧结体、制备方法和用途 - Google Patents

红色氧化锆烧结体、制备方法和用途 Download PDF

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CN109956747B
CN109956747B CN201910367575.XA CN201910367575A CN109956747B CN 109956747 B CN109956747 B CN 109956747B CN 201910367575 A CN201910367575 A CN 201910367575A CN 109956747 B CN109956747 B CN 109956747B
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oxide
sintered body
zirconia sintered
red
cerium
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CN109956747A (zh
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宋锡滨
杨爱民
张巧云
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Shandong Sinocera Functional Material Co Ltd
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Shandong Sinocera Functional Material Co Ltd
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Abstract

本发明提供了一种红色氧化锆烧结体,包括铈氧化物、辅助金属氧化物和锆氧化物;所述辅助金属氧化物包括钇氧化物、镁氧化物、钙氧化物和镱氧化物中的任意一种或至少两种的组合;红色氧化锆烧结体满足铈氧化物含量为0.2~1.5mol%;铈氧化物包括三价铈氧化物;铈氧化物和辅助金属氧化物含量之和为1.1~2.5mol%;烧结体的断裂韧性≥8MPa·m1/2。本发明提供的氧化锆烧结体呈红色外观,且具有8MPa·m1/2以上的韧性,拓展了其应用场景,能够被用于手机背板、饰品、表盘等产品。

Description

红色氧化锆烧结体、制备方法和用途
技术领域
本发明属于陶瓷材料领域,具体涉及一种红色氧化锆烧结体、制备方法和用途。
背景技术
氧化锆陶瓷材料具有较高的抗弯强度、硬度、断裂韧性等优良特性,可广泛应用于能源、环境及材料领域。红色作为一种鲜艳、明亮的色调受到消费者青睐,因此,本领域需要开发一种红色氧化锆陶瓷,以便用于装饰部件或电子设备等的外观构件。
现有技术公开了通过硫硒化镉红和氧化铈还原发色,实现对氧化锆烧结体红色着色的方法。硫硒化镉红色氧化锆陶瓷烧结温度在1400℃左右,而硫硒化镉在低于该烧结温度时便会分解,且重金属镉作为一种有毒有害物质无法应用于外观构件。采用氧化铈作为着色剂,铈还原成三价发红色,但是铈的加入造成氧化锆烧结体韧性的降低,摔落后更容易造成裂纹,无法满足消费电子、饰品等的需求,尤其是手机背板产品落球性能的要求。
为了改善铈还原发色产生红色的氧化锆烧结体的韧性,现有技术给出了添加钇来改善韧性,但是钇的添加量一般较高,成本提高。基于对四价铈氧化物CeO2稳定的氧化锆陶瓷,本领域大都认为氧化钇可以按照相同的添加量来延续对红色氧化锆陶瓷的韧性的改进,即钇的添加量低于2mol%,氧化锆无法保持四方晶型,造成韧性下降。
CN104446457A公开了一种含0~6mol%氧化钇、0~15mol%氧化铈、0.02~1mol%氧化钛、0~20mol%氧化铝和0~5mol%钛酸钡的改性氧化锆陶瓷材料,几种组分可以极大地提高材料的断裂韧性、抗弯强度、耐磨性及硬度等性能。但掺杂组分较多,制备工序较为复杂,且掺杂组分含量较高可能会使氧化锆自身的优异性能受到影响。
本领域需要开发一种具有较高韧性的红色氧化锆烧结体,较高的韧性能够拓展其在消费电子、装饰品等领域的应用。
发明内容
针对现有技术的不足,本发明的目的之一是提供一种红色氧化锆烧结体,包括铈氧化物、辅助金属氧化物和锆氧化物;所述辅助金属氧化物包括钇氧化物、镁氧化物、钙氧化物和镱氧化物中的任意一种或至少两种的组合;
所述红色氧化锆烧结体满足条件(1)~(4):
(1)所述铈氧化物含量为0.2~1.5mol%;
(2)所述铈氧化物包括三价铈氧化物;
(3)所述铈氧化物和所述辅助金属氧化物含量之和为1.1~2.5mol%;
(4)所述烧结体的断裂韧性≥8MPa·m1/2
其中,所述铈氧化物以CeO2计,所述钇氧化物以Y2O3计。
本发明提供的红色氧化锆烧结体同时满足铈氧化物含量为0.2~1.5mol%,且含有三价铈氧化物,铈氧化物和辅助金属氧化物含量之和为1.1~2.5mol%;且断裂韧性≥8MPa m1/2
在所述的条件(1)~(4)中,三价氧化铈提供红色的色调,三价铈氧化物含量太低,无法得到红色外观,三价铈氧化物含量过高,红色氧化锆烧结体韧性下降。辅助金属氧化物起到提高红色氧化锆烧结体韧性的作用,但是辅助金属氧化物的添加量与三价铈氧化物的含量需要进行合适的匹配,才能够获得具有红色外观,且韧性较高的烧结体。如果辅助金属氧化物与三价铈氧化物的含量之和过低,则烧结体稳定性差,容易破碎,而辅助金属氧化物与三价铈氧化物的含量之和过高,则韧性反而会造成下降。
需要说明的是,本发明提供的条件(1)~(4)是一个整体,相互之间不能够单独割裂,需要整体进行实施。条件(1)~(4)充分考虑了颜色、韧性和组分含量的关系,在组分方面找到了关键的铈氧化物的含量和辅助金属氧化物的含量的关系。
此外,在本发明提供的红色氧化锆烧结体中,氧化锆可以用来补齐各组分之和至100mol%。
本发明提供的红色氧化锆烧结体中,铈氧化物的含量可以是0.2~1.5mol%中的任意点值,示例性的如0.3mol%、0.5mol%、0.8mol%、1.0mol%、1.1mol%、1.2mol%、1.3mol%、1.4mol%等。本发明提供的红色氧化锆烧结体中,所述铈氧化物和所述辅助金属氧化物含量之和为1.1~2.5mol%,示例性的如1.3mol%、1.5mol%、1.8mol%、2.0mol%、2.1mol%、2.2mol%、2.3mol%、2.4mol%等。所述烧结体的断裂韧性≥8MPa·m1/2,示例性的如8MPa·m1/2、10MPa·m1/2、11MPa·m1/2、12MPa·m1/2、15MPa·m1/2、18MPa·m1/2、22MPa·m1/2、25MPa·m1/2、28MPa·m1/2等。
需要说明的是,本发明所述的红色氧化锆烧结体中,铈氧化物以CeO2计,但这不说明在所述红色氧化锆烧结体中,铈氧化物以CeO2的形式存在,反而在所述红色氧化锆烧结体中,铈氧化物以三价铈氧化物的形式存在。
优选地,所述烧结体的三点抗弯强度≥1000MPa,示例性的如1100MPa、1200MPa、1400MPa、1700MPa、1900MPa、2100MPa、2500MPa、2700MPa、2900MPa等。
三点抗弯强度能够体现氧化锆烧结体的结构稳定性,三点抗弯强度≥1000MPa,证明其热稳定性好,陶瓷内部无裂纹。
优选地,所述烧结体的平均晶粒尺寸≤500nm,例如480nm、450nm、430nm、400nm、380nm、350nm、330nm、300nm、280nm、250nm、230nm、200nm、180nm、150nm、130nm、120nm、100nm、80nm、50nm、20nm等。
烧结体的平均粒径尺寸过大,氧化锆烧结体容易脆性断裂,红色氧化锆烧结体的热稳定性变差,进而影响其三点抗弯强度。
优选地,所述烧结体的晶粒尺寸的粒度分布为150~400nm,例如180nm、200nm、220nm、250nm、280nm、320nm、350nm、380nm等。
作为优选技术方案,本发明所述辅助金属氧化物为钇氧化物。
优选地,所述铈氧化物中,按铈原子计,三价铈的摩尔百分比≥60%(例如65%、70%、75%、80%、85%、90%、95%、98%、100%等),优选≥80,进一步优选≥95%。三价铈氧化物为氧化锆烧结体提供红色外观,三价铈含量越高,铈原子的有效利用率越高。
作为优选技术方案,本发明所述红色氧化锆烧结体中还含有铝氧化物。
优选地,以Al2O3计,所述铝氧化物在所述红色氧化锆烧结体中的摩尔百分比≤2.5mol%,例如2.4mol%、2.0mol%、1.8mol%、1.5mol%、1.1mol%、0.8mol%、0.7mol%、0.5mol%、0.4mol%、0.3mol%等,优选≤1.2mol%等。
铝氧化物的加入能够赋予红色氧化锆烧结体更加鲜艳的红色,且其能够减小红色氧化锆应用环境中的背景色的干扰,比如将红色氧化锆烧结体用于黑色的基底上,添加了铝氧化物后,其红色的显示不会因为黑色基底发黑。
优选地,所述铝氧化物包括三氧化二铝,优选α-Al2O3、γ-Al2O3中的任意一种或至少两种的组合。
优选地,所述红色氧化锆烧结体在Lab表色系统中,a值≥25,a值与b值的比值≥0.9,L值≥20。
Lab表色系统是本领域对颜色的统一化标准,a值代表红绿值,a值为正值时,a值越大,代表颜色红值越高;b值代表黄蓝值,b值为正值时,b值越大,代表黄值越高;L值代表明亮度,L值越大,亮度越高。
本发明的红色氧化锆陶瓷的红色是本领域对红色的普遍认识,a值≥25,a值与b值的比值≥0.9,L值≥20应当被认为是本发明对红色的一个优选的范围。
作为优选技术方案,本发明所述红色氧化锆烧结体按摩尔百分比包括如下组分:
Figure GDA0002153738670000051
Figure GDA0002153738670000061
其中,所述铈氧化物和所述钇氧化物含量之和为1.1~2.5mol%。
作为进一步优选的技术方案,本发明所述红色氧化锆烧结体按摩尔百分比包括如下组分:
Figure GDA0002153738670000062
其中所述铈氧化物和所述钇氧化物含量之和为1.4~2.2mol%。
本发明目的之二是提供一种红色氧化锆烧结体的制备方法,所述方法包括如下步骤:
(I)将铈氧化物、辅助金属氧化物和氧化锆按照条件(a)~(d)的摩尔比进行混合,得到待烧结混合物;条件(a)所述铈氧化物含量为0.2~1.5mol%;条件(b)所述铈氧化物和所述辅助金属氧化物含量之和为1.1~2.5mol%;条件(c)余量为氧化锆;所述辅助金属氧化物包括钇氧化物、镁氧化物、钙氧化物和镱氧化物中的任意一种或至少两种的组合;
(II)将步骤(I)得到的混合物先在常压下进行一次烧结,然后在还原气氛下进行二次烧结,得到红色氧化锆烧结体。
在本发明提供的红色氧化锆烧结体的制备方法中,满足条件(a)~(c)和二次烧结既可以获得本发明目的之一提供的红色氧化锆烧结体。
在本发明提供的红色氧化锆烧结体的制备方法中,二次烧结的方式能够保证三价铈的存在,赋予烧结体红色外观,而同时辅助金属氧化物、铈氧化物和锆氧化物被烧结得到单斜相和四方相的混合晶体,获得韧性≥8MPa·m1/2的氧化锆烧结体。
优选地,步骤(I)所述待烧结混合物中还含有铝氧化物,优选含有2.5mol%以下的铝氧化物。示例性地,所述待烧结混合物中,铝氧化物的含量示例性的为2.4mol%、2.0mol%、1.8mol%、1.5mol%、1.1mol%、0.8mol%、0.7mol%、0.5mol%、0.4mol%、0.3mol%等,优选≤1.2mol%。
作为优选技术方案,所述待烧结混合物摩尔百分比包括如下组分:
Figure GDA0002153738670000071
其中,所述铈氧化物和所述钇氧化物含量之和为1.1~2.5mol%。
作为进一步优选的技术方案,所述红色氧化锆烧结体按摩尔百分比包括如下组分:
Figure GDA0002153738670000072
其中所述铈氧化物和所述钇氧化物含量之和为1.4~2.2mol%。
优选地,所述氧化锆的晶体粒径≤500nm,例如480nm、450nm、430nm、400nm、380nm、350nm、330nm、300nm、280nm、250nm、230nm、200nm、180nm、150nm、130nm、120nm、100nm、80nm、50nm、20nm等。
优选地,所述氧化锆通过水热法制备。
优选地,所述一次烧结的烧结温度为1300~1600℃(例如1350℃、1400℃、1450℃、1500℃、1550℃等),烧结时间1~5h(例如1.5h、2.0h、2.5h、3.0h、3.5h、4.0h、4.5h等);优选烧结温度1400℃,烧结时间3h。
优选地,所述二次烧结的温度为1300~1600℃(例如1350℃、1400℃、1450℃、1500℃、1550℃等),烧结时间为1~5h(例如1.5h、2.0h、2.5h、3.0h、3.5h、4.0h、4.5h等);优选烧结温度1550℃,烧结时间为3h。
选用一次烧结和二次烧结配合,一次烧结能够使得氧化锆陶瓷致密度化,气孔基本排除,从而得到一次烧结体。一次烧结体在还原气氛下进行二次烧结,能充分的将四价铈转化为三价铈,从而得到大红色陶瓷外观。
优选地,所述还原性气氛包括氢气气氛、氢气与惰性气体的混合气体中的任意一种,优选氢气与氮气的混合气体,所述混合气体中氢气的体积比为3~7v%(例如3.5%、4.0%、4.5%、5.0%、5.5%、6.0%、6.5%等)。
作为可选技术方案,本发明所述红色氧化锆烧结体的制备方法包括如下步骤:
(I)将铈氧化物、钇氧化物和氧化锆按照进行混合,得到待烧结混合物;所述待烧结混合物摩尔百分比包括如下组分:铈氧化物0.2~1.5mol%、钇氧化物0.8~1.2mol%、铝氧化物0~2.5mol%、氧化锆至100mol%;且所述铈氧化物和所述钇氧化物含量之和为1.1~2.5mol%;
(II)将步骤(I)得到的混合物先在1300~1600℃下常压一次烧结1~5h,然后在1300~1600℃下,在氢气与氮气的混合气体气氛中二次烧结1~5h。
本发明目的之三是提供一种红色氧化锆制品,所述红色氧化锆制品通过目的之一所述的红色氧化锆烧结体处理得到。
需要说明的是,为了获得不同颜色,本领域技术人员可以向所述红色氧化锆烧结体中加入其它元素,以获得需要的颜色。
优选地,所述制品包括手机背板、表壳、表链、表针、饰品中的任意一种。
本发明目的之四是提供一种电子产品,所述电子产品的手机背板包括目的之三所述的红色氧化锆制品。
与现有技术相比,本发明具有如下有益效果:
(1)本发明提供的氧化锆烧结体呈红色外观,且具有8MPa·m1/2以上的韧性,所述烧结体的三点抗弯强度≥1000MPa;拓展了其应用场景,能够被用于手机背板、饰品、表盘等产品,且由于其具有的高韧性,提高陶瓷件的耐摔性。
(2)本发明给出的制备方法简单,能够制备出外观红色的高韧性氧化锆烧结体。
具体实施方式
为便于理解本发明,本发明列举实施例如下。本领域技术人员应该明了,所述实施例仅仅是帮助理解本发明,不应视为对本发明的具体限制。
实施例1~17和对比例1~11
一种红色氧化锆烧结体的制备方法,包括如下步骤:
(1)将铈氧化物(CeO2)、钇氧化物(Y2O3)、氧化锆(ZrO2)和铝氧化物(Al2O3)按照进行混合,得到待烧结混合物;所述待烧结混合物摩尔百分比按照表1-1进行混合;
(2)将步骤(1)得到的混合物先在1500℃下常压一次烧结3h,然后在1500℃下,在氢气与氮气的混合气体气氛中二次烧结3h。
表1-1
Figure GDA0002153738670000101
Figure GDA0002153738670000111
性能测试1:
将实施例1~17和对比例1~11得到的烧结体进行如下性能测试:
(1)三点抗弯强度:测试方法为GB-T 6569-2006;
(2)韧性:测试方法为ISO 24370-2005;
(3)Lab表色:测试方法为选用1mm厚度瓷片,双面抛光至光滑度Ra小于0.04;将处理后的瓷片放置在柯尼卡美能达设备CM-3700A-U检测,设备光源D65光源,采用SCE模式进行测试。测试结果见表1-2。
表1-2
Figure GDA0002153738670000121
Figure GDA0002153738670000131
从表1-2可以看出,满足铈氧化物(三价铈氧化物)含量为0.2~1.5mol%;铈氧化物和钇氧化物含量之和为1.1~2.5mol%(实施例1~15)的氧化锆烧结体其韧性均在8MPa·m1/2以上,且三点抗弯强度在1000MPa以上,并呈现红色。
从对比例1和实施例1相比,可以看出,铈氧化物含量不变,钇氧化物含量降低,使得钇氧化物和铈氧化物的含量低于1.1mol%,则会造成烧结体无法在室温下稳定,陶瓷开裂;从对比例2和实施例1相比,可以看出,钇氧化物含量不变,铈氧化物含量降低,使得钇氧化物和铈氧化物的含量低于1.1mol%,则会造成烧结体无法在室温下稳定,陶瓷开裂,且不能得大红色外观。
从对比例3和实施例4相比,可以看出,钇氧化物不变,铈氧化物高于1.5mol%时,会造成韧性降低;而从对比例4和实施例4相比,可以看出,钇氧化物不变,铈氧化物低于0.2mol%时,会无法呈现红色外观。
从对比例5、对比例6和实施例7相比,可以看出,铈氧化物含量不变,钇氧化物含量增加,钇氧化物的含量并非越高越好,如果钇氧化物和铈氧化物的含量超过了2.5mol%,则会造成韧性的明显降低。从对比例7、对比例8和实施例7相比,可以看出,铈氧化物含量增加至钇氧化物和铈氧化物的含量超过了2.5mol%,同样会造成韧性的明显降低。因此,无论是增加钇氧化物的含量还是增加铈氧化物的含量,均会造成韧性的明显下降。
从实施例16和实施例17可以看出,本发明的红色氧化锆与其他的金属氧化物具有良好的配伍性,能够通过添加其他元素获得预期的颜色,例如通过加入氧化铝获得偏橙色的氧化锆。
实施例18~20
与实施例8的区别仅在于,将钇氧化物等摩尔替换为镁氧化物MgO2(实施例18)、钙氧化物CaO(实施例19)和镱氧化物Yb2O3(实施例20)。
性能测试2:
按照性能测试1的方法对实施例18~20进行性能测,测试结果见表2。
表2
实施例 三点抗弯强度/MPa 韧性/MPa·m<sup>1/2</sup> L a b
实施例18 1052 9.32 33.65 42.18 40.28
实施例19 1023 9.13 32.69 42.89 40.12
实施例20 1235 11.87 33.99 42.68 41.53
从表2可以看出,其他氧化物等摩尔替换氧化钇,均可得到韧性≥8MPa·m1/2的红色烧结体,但是三点抗弯强度、韧性的表现均不如等摩尔添加氧化钇的红色氧化锆。
申请人声明,本发明通过上述实施例来说明本发明的详细工艺设备和工艺流程,但本发明并不局限于上述详细工艺设备和工艺流程,即不意味着本发明必须依赖上述详细工艺设备和工艺流程才能实施。所属技术领域的技术人员应该明了,对本发明的任何改进,对本发明产品各原料的等效替换及辅助成分的添加、具体方式的选择等,均落在本发明的保护范围和公开范围之内。

Claims (30)

1.一种红色氧化锆烧结体,其特征在于,包括铈氧化物、辅助金属氧化物和锆氧化物;所述辅助金属氧化物包括钇氧化物、镁氧化物、钙氧化物和镱氧化物中的任意一种或至少两种的组合;所述红色氧化锆烧结体满足条件(1)~(4):
(1)所述铈氧化物含量为0.2~1.5mol%;
(2)所述铈氧化物包括三价铈氧化物;
(3)所述铈氧化物和所述辅助金属氧化物含量之和为1.1~1.3mol%;
(4)所述烧结体的断裂韧性≥8MPa·m1/2
其中,所述铈氧化物以CeO2计,所述钇氧化物以Y2O3计。
2.如权利要求1所述的红色氧化锆烧结体,其特征在于,所述烧结体的三点抗弯强度≥1000MPa。
3.如权利要求1所述的红色氧化锆烧结体,其特征在于,所述烧结体的平均晶粒尺寸≤500nm。
4.如权利要求1所述的红色氧化锆烧结体,其特征在于,所述烧结体的晶粒尺寸的粒度分布为150~400nm。
5.如权利要求1所述的红色氧化锆烧结体,其特征在于,所述辅助金属氧化物为钇氧化物。
6.如权利要求1所述的红色氧化锆烧结体,其特征在于,所述铈氧化物中,按铈原子计,三价铈的摩尔百分比≥60%。
7.如权利要求1所述的红色氧化锆烧结体,其特征在于,所述铈氧化物中,按铈原子计,三价铈的摩尔百分比≥80%。
8.如权利要求1所述的红色氧化锆烧结体,其特征在于,所述铈氧化物中,按铈原子计,三价铈的摩尔百分比≥95%。
9.如权利要求1所述的红色氧化锆烧结体,其特征在于,所述红色氧化锆烧结体中还含有铝氧化物。
10.如权利要求9所述的红色氧化锆烧结体,其特征在于,以Al2O3计,所述铝氧化物在所述红色氧化锆烧结体中的摩尔百分比≤2.5mol%。
11.如权利要求9所述的红色氧化锆烧结体,其特征在于,以Al2O3计,所述铝氧化物在所述红色氧化锆烧结体中的摩尔百分比≤1.2mol%。
12.如权利要求9所述的红色氧化锆烧结体,其特征在于,所述铝氧化物包括三氧化二铝。
13.如权利要求9所述的红色氧化锆烧结体,其特征在于,所述铝氧化物包括α-Al2O3、γ-Al2O3中的任意一种或两种的组合。
14.如权利要求1所述的红色氧化锆烧结体,其特征在于,所述红色氧化锆烧结体在Lab表色系统中,a值≥25,a值与b值的比值≥0.9,L值≥20。
15.如权利要求1~14之一所述的红色氧化锆烧结体,其特征在于,所述红色氧化锆烧结体按摩尔百分比包括如下组分:
铈氧化物 0.2~1.5mol%
钇氧化物 0.8~2.0mol%
铝氧化物 0~2.5mol%
氧化锆至100mol%;
其中,所述铈氧化物和所述钇氧化物含量之和为1.1~1.3mol%。
16.一种如权利要求1~15之一所述的红色氧化锆烧结体的制备方法,其特征在于,所述方法包括如下步骤:
(I)将铈氧化物、辅助金属氧化物和氧化锆按照条件(a)~(c)的摩尔比进行混合,得到待烧结混合物;条件(a)所述铈氧化物含量为0.2~1.5mol%;条件(b)所述铈氧化物和所述辅助金属氧化物含量之和为1.1~1.3mol%;条件(c)余量为氧化锆;所述辅助金属氧化物包括钇氧化物、镁氧化物、钙氧化物和镱氧化物中的任意一种或至少两种的组合;
(II)将步骤(I)得到的混合物先在常压下进行一次烧结,然后在还原气氛下进行二次烧结,得到红色氧化锆烧结体。
17.如权利要求16所述的制备方法,其特征在于,步骤(I)所述待烧结混合物中还含有铝氧化物。
18.如权利要求16所述的制备方法,其特征在于,步骤(I)所述待烧结混合物中含有2.5mol%以下的铝氧化物。
19.如权利要求16所述的制备方法,其特征在于,所述待烧结混合物摩尔百分比包括如下组分:
铈氧化物 0.2~1.5mol%
钇氧化物 0.8~2.0mol%
铝氧化物 0~2.5mol%
氧化锆至100mol%;
其中,所述铈氧化物和所述钇氧化物含量之和为1.1~1.3mol%。
20.如权利要求16所述的制备方法,其特征在于,所述氧化锆烧结体的晶体粒径≤500nm。
21.如权利要求16所述的制备方法,其特征在于,所述氧化锆通过水热法制备。
22.如权利要求16所述的制备方法,其特征在于,所述一次烧结的烧结温度为1300~1600℃,烧结时间1~5h。
23.如权利要求16所述的制备方法,其特征在于,所述一次烧结的烧结温度1400℃,烧结时间3h。
24.如权利要求16所述的制备方法,其特征在于,所述二次烧结的温度为1300~1600℃,烧结时间为1~5h。
25.如权利要求16所述的制备方法,其特征在于,所述二次烧结的烧结温度1550℃,烧结时间为3h。
26.如权利要求16所述的制备方法,其特征在于,所述还原气氛包括氢气气氛、氢气与惰性气体的混合气体中的任意一种。
27.如权利要求16所述的制备方法,其特征在于,所述还原气氛为氢气与氮气的混合气体,所述混合气体中氢气的体积比为3~7v%。
28.如权利要求16所述的制备方法,其特征在于,所述方法包括如下步骤:
(I)将铈氧化物、钇氧化物和氧化锆按照条件(a)~(c)的摩尔比进行混合,得到待烧结混合物;所述待烧结混合物摩尔百分比包括如下组分:铈氧化物0.2~1.5mol%、钇氧化物0.8~1.2mol%、铝氧化物0~2.5mol%、氧化锆至100mol%;且所述铈氧化物和所述钇氧化物含量之和为1.1~1.3mol%;
(II)将步骤(I)得到的混合物先在1300~1600℃下常压一次烧结1~5h,然后在1300~1600℃下,在氢气与氮气的混合气体气氛中二次烧结1~5h。
29.一种红色氧化锆制品,其特征在于,所述红色氧化锆制品通过权利要求1~15之一所述的红色氧化锆烧结体处理得到。
30.如权利要求29所述的红色氧化锆制品,其特征在于,所述制品包括手机背板、表壳、表链、表针、饰品中的任意一种。
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