CN110228992A - 一种高热稳定性高白陶瓷及其制备方法 - Google Patents
一种高热稳定性高白陶瓷及其制备方法 Download PDFInfo
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- 229910052573 porcelain Inorganic materials 0.000 title claims abstract description 39
- 238000002360 preparation method Methods 0.000 title claims abstract description 27
- 239000002994 raw material Substances 0.000 claims abstract description 23
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims abstract description 21
- 239000005995 Aluminium silicate Substances 0.000 claims abstract description 20
- 235000012211 aluminium silicate Nutrition 0.000 claims abstract description 20
- 239000000463 material Substances 0.000 claims abstract description 19
- 238000001354 calcination Methods 0.000 claims abstract description 18
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims abstract description 15
- DLHONNLASJQAHX-UHFFFAOYSA-N aluminum;potassium;oxygen(2-);silicon(4+) Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[Al+3].[Si+4].[Si+4].[Si+4].[K+] DLHONNLASJQAHX-UHFFFAOYSA-N 0.000 claims abstract description 15
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 15
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 13
- 238000000034 method Methods 0.000 claims abstract description 9
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 claims abstract description 8
- 239000000440 bentonite Substances 0.000 claims abstract description 8
- 229910000278 bentonite Inorganic materials 0.000 claims abstract description 8
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000011787 zinc oxide Substances 0.000 claims abstract description 8
- 241000276489 Merlangius merlangus Species 0.000 claims abstract description 7
- 239000010453 quartz Substances 0.000 claims abstract description 7
- 238000010304 firing Methods 0.000 claims abstract description 4
- HEHRHMRHPUNLIR-UHFFFAOYSA-N aluminum;hydroxy-[hydroxy(oxo)silyl]oxy-oxosilane;lithium Chemical compound [Li].[Al].O[Si](=O)O[Si](O)=O.O[Si](=O)O[Si](O)=O HEHRHMRHPUNLIR-UHFFFAOYSA-N 0.000 claims description 15
- 229910052670 petalite Inorganic materials 0.000 claims description 15
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 14
- CNLWCVNCHLKFHK-UHFFFAOYSA-N aluminum;lithium;dioxido(oxo)silane Chemical compound [Li+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O CNLWCVNCHLKFHK-UHFFFAOYSA-N 0.000 claims description 12
- 239000000203 mixture Substances 0.000 claims description 12
- 229910052642 spodumene Inorganic materials 0.000 claims description 12
- 229910052742 iron Inorganic materials 0.000 claims description 7
- 238000004321 preservation Methods 0.000 claims description 6
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- 229910052623 talc Inorganic materials 0.000 claims description 6
- 239000011230 binding agent Substances 0.000 claims description 5
- 235000015895 biscuits Nutrition 0.000 claims description 5
- 239000000654 additive Substances 0.000 claims description 4
- 230000000996 additive effect Effects 0.000 claims description 4
- PNEFIWYZWIQKEK-UHFFFAOYSA-N carbonic acid;lithium Chemical compound [Li].OC(O)=O PNEFIWYZWIQKEK-UHFFFAOYSA-N 0.000 claims description 4
- 238000001816 cooling Methods 0.000 claims description 4
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- 230000032683 aging Effects 0.000 claims description 3
- 230000018044 dehydration Effects 0.000 claims description 3
- 238000006297 dehydration reaction Methods 0.000 claims description 3
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- 230000001590 oxidative effect Effects 0.000 claims description 3
- 235000019832 sodium triphosphate Nutrition 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
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- UFVKGYZPFZQRLF-UHFFFAOYSA-N hydroxypropyl methyl cellulose Chemical group OC1C(O)C(OC)OC(CO)C1OC1C(O)C(O)C(OC2C(C(O)C(OC3C(C(O)C(O)C(CO)O3)O)C(CO)O2)O)C(CO)O1 UFVKGYZPFZQRLF-UHFFFAOYSA-N 0.000 claims description 2
- XUBKPYAWPSXPDZ-UHFFFAOYSA-N [Ba].OS(O)(=O)=O Chemical compound [Ba].OS(O)(=O)=O XUBKPYAWPSXPDZ-UHFFFAOYSA-N 0.000 claims 1
- 239000000919 ceramic Substances 0.000 abstract description 30
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- 229910052906 cristobalite Inorganic materials 0.000 description 6
- 239000010433 feldspar Substances 0.000 description 5
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- 235000014692 zinc oxide Nutrition 0.000 description 5
- 238000002834 transmittance Methods 0.000 description 4
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 3
- KKCBUQHMOMHUOY-UHFFFAOYSA-N Na2O Inorganic materials [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 description 3
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 3
- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O KZHJGOXRZJKJNY-UHFFFAOYSA-N 0.000 description 3
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 3
- 229910052744 lithium Inorganic materials 0.000 description 3
- 229910052863 mullite Inorganic materials 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- 239000005864 Sulphur Substances 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 229910052788 barium Inorganic materials 0.000 description 2
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 description 2
- 229910052681 coesite Inorganic materials 0.000 description 2
- 229910052593 corundum Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229910052700 potassium Inorganic materials 0.000 description 2
- 239000011591 potassium Substances 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 229910052682 stishovite Inorganic materials 0.000 description 2
- 229910052905 tridymite Inorganic materials 0.000 description 2
- 229910001845 yogo sapphire Inorganic materials 0.000 description 2
- -1 Hydroxypropyl Chemical group 0.000 description 1
- FUJCRWPEOMXPAD-UHFFFAOYSA-N Li2O Inorganic materials [Li+].[Li+].[O-2] FUJCRWPEOMXPAD-UHFFFAOYSA-N 0.000 description 1
- 229910010199 LiAl Inorganic materials 0.000 description 1
- 229910007270 Si2O6 Inorganic materials 0.000 description 1
- 241001122767 Theaceae Species 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000008364 bulk solution Substances 0.000 description 1
- 238000004040 coloring Methods 0.000 description 1
- 239000006071 cream Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- XUCJHNOBJLKZNU-UHFFFAOYSA-M dilithium;hydroxide Chemical compound [Li+].[Li+].[OH-] XUCJHNOBJLKZNU-UHFFFAOYSA-M 0.000 description 1
- 230000035622 drinking Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 229910052622 kaolinite Inorganic materials 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000006123 lithium glass Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 229920000609 methyl cellulose Polymers 0.000 description 1
- 239000001923 methylcellulose Substances 0.000 description 1
- 235000010981 methylcellulose Nutrition 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 235000010755 mineral Nutrition 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000009738 saturating Methods 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C8/00—Enamels; Glazes; Fusion seal compositions being frit compositions having non-frit additions
- C03C8/14—Glass frit mixtures having non-frit additions, e.g. opacifiers, colorants, mill-additions
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Abstract
本发明属于日用陶瓷技术领域,具体的涉及一种高热稳定性高白陶瓷及其制备方法。该种高热稳定性高白陶瓷包括高热稳定性高白坯料和透明釉料,所述高热稳定性高白坯料包括以下原料:内蒙古钾长石、临沧高岭土、龙岩高岭土、膨润土、低膨胀剂;所述透明釉料包括以下重量份的原料:江西钾长石、石英、龙岩高岭土、重钙、煅烧氧化锌、硫酸钡、煅烧滑份、调节剂份。采用本发明提供的工艺方法,所制备的陶瓷坯釉结合良好,瓷质细腻通透,釉面平整莹润,白度达到81以上,热稳定性达到200℃‑20℃热交换二次不裂;本发明制作原料易得,烧成范围较宽,制备工艺简单,产品成品率高,适用于日用陶瓷方面的推广应用。
Description
技术领域
本发明属于釉料制备领域,具体涉及一种高热稳定性高白陶瓷及其制备方法。
背景技术
德化与景德镇、醴陵并称“中国三大古瓷都”,自宋代开始,德化白瓷就成为“海上丝绸之路”的重要输出品,受到欧洲贵族们的追捧。在明代,制瓷大师们生产出一种温润乳白,如脂如玉的白瓷,法国人对当时德化白瓷有“中国白”(BLANC DE CHINE)的赞誉,他们认为这是“中国瓷器之上品”。德化白瓷以其独具特色的瓷质和工艺享誉中外,有“世界白瓷***,中国白瓷看德化”之美誉。
当今,德化白瓷的热度依然很高,在市场上占有相当高的份额,主要有瓷塑类和茶具类产品,这得益于德化白瓷具有白度好,光泽度高,致密度高,透光度好等特点。德化白瓷属于长石质瓷,主要以钾纳长石作为熔剂原料,长石能降低坯体的熔化温度并降温烧成温度,促进高岭土的分解和莫来石晶相的形成,长石熔体冷却后还是构成玻璃基质的主体,因此,瓷坯中的物相主要由莫来石、残留方石英、玻璃、气孔等组成。制瓷工作者们为了追求陶瓷的高白度、高透光度,就是要在瓷坯中形成更多的玻璃相,然而,残留方石英和玻璃相的热膨胀系数偏高,这导致了高白瓷的热稳定性差,难以达到日用瓷器国家标准GB/T 3532-2009规定的180℃-20℃热交换一次不裂的要求,使高白德化瓷作为日用陶瓷的推广受到了很大的限制。
透锂长石Li[AlSi4O10]和锂辉石LiAl[Si2O6]两种天然矿物的热膨胀系数α都低于1.0×10-6/℃,是制作高温耐热陶瓷的主要原料。例如,普通陶瓷的热膨胀系数在7×10-6/℃左右,通过在普通陶瓷配方中添加透锂长石30wt%时,陶瓷的热膨胀系数可以降低到4.42×10-6/℃;有些添加了锂辉石的耐热陶瓷煲甚至可以达到800℃-20℃热交换不裂。透锂长石和锂辉石可以明显提高传统陶瓷的热稳定性。
为了解决德化白瓷热稳定性偏差的问题,研究者们试着将透锂长石、锂辉石等原料添加进白瓷坯料中,但效果不明显,主要体现在以下两方面:(1)陶瓷热稳定性有所改善时,却难以满足德化白瓷的品质要求;(2)在满足透光度、白度的要求下,其热稳定性难以达到日用瓷器国家标准的要求。
发明内容
本发明的目的是克服现有技术的缺点,提供一种高热稳定性高白陶瓷及其制备方法。
一种高热稳定性高白陶瓷,包括高热稳定性高白坯料和透明釉料,所述高热稳定性高白坯料包括以下重量份的原料:内蒙古钾长石40-55份、临沧高岭土15-25份、龙岩高岭土10-20份、膨润土4-6份、低膨胀剂10-18份;所述透明釉料包括以下重量份的原料:江西钾长石40-50份、石英15-25份、龙岩高岭土5-10份、重钙3-6份、煅烧氧化锌2-4份、硫酸钡4-6份、煅烧滑石6-12份、调节剂4-8份。
进一步的,低膨胀剂为重量比为1:0.5-2的锂辉石和透锂长石混合物。
进一步的,调节剂为重量比为1:0.5-2的透锂长石和碳酸锂混合物。
一种高热稳定性高白陶瓷的制备方法,其特征在于:制备上述的高热稳定性高白陶瓷,包括如下步骤:
步骤1:坯体的制备
(1)精选原料并进行预先粉碎,根据配料比分别称取内蒙古钾长石、临沧高岭土、龙岩高岭土、膨润土、低膨胀剂,加入一定量的解胶剂和粘结剂;
(2)泥浆经过除铁、脱水、真空练泥、陈腐后,得到泥料;
(3)泥料成型为坯体,经过晾干、利坯后,在700-800℃温度下烧制得到素坯,备用;
步骤二:釉浆的制备
(1)精选原料,根据配比量将龙岩高岭土、江西钾长石、石英、重钙、煅烧氧化锌、硫酸钡、煅烧滑石、调节剂分别置于球磨机中进行研磨;
(2)研磨后釉浆过100-200目网筛,用强磁铁棒对釉浆进行除铁,并控制釉浆浓度,备用;
步骤三:施釉,在素坯上施釉,并晾干;
步骤四:烧制,采用氧化焰烧成,烧成制度总升温时间保证11小时以上,最高烧成温度1290-1320℃。
进一步的,步骤1中,制坯时,按照料:球:水比例为1:1.8-2.5:0.55-0.65进行研磨。
进一步的,步骤三中,采用浸渍法将釉浆施于素烧坯体上。
进一步的,步骤一中解胶剂为三聚磷酸钠,添加量为物料的0.3-0.5wt%。
进一步的,步骤一中粘结剂为羟丙基甲基纤维素,添加量为物料的0.4-0.8wt%。
进一步的,步骤二中制备的釉浆浓度为波美度38-42。
进一步的,所述烧成制度包括以下几个关键点:900至1100℃阶段烧制3小时以上,1260℃至最高烧成温度烧制3h以上,高火保温20-40min,保温结束后的高温段微开窑门,之后随窑冷却。
本发明与现有技术相比,其有益效果为:
本发明与现有技术相比,有以下有益效果:
(1)本发明所述的高热稳定性高白陶瓷,其坯料由内蒙古钾长石、临沧高岭土、龙岩高岭土、膨润土、锂辉石、透锂长石组成。所选用的原料着色元素成分低,如内蒙古钾长石的化学组成:SiO2 66.74%、Al2O3 17.35%、CaO 0.16%、MgO 0.07%、Fe2O3 0.03%、TiO20.01%、K2O 13.63%、Na2O 1.45%、IL 0.34%,临沧高岭土的化学组成:SiO2 56.35%、Al2O3 35.73%、Fe2O3 0.06%、CaO 0.16%、MgO 0.62%、TiO2 0.02%、K2O 0.83%、Na2O0.28%、IL 5.95%,而且锂辉石和透锂长石只含有微量的铁和钛元素,这些优质原料能够很好地保证白瓷的白度和透光度。在坯料中添加部分锂辉石或者透锂长石,在坯体中引入低膨胀的β-锂辉石和透锂长石晶相,且能与少量方石英形成固溶体,抑制方石英的残留,这些作用都能很大程度提高坯体的热稳定性。另外,锂辉石和透锂长石有助于在较低温度下就能形成莫来石,以增加坯体的机械强度和化学稳定性。
(2)通过在坯料中添加部分锂辉石或者透锂长石,坯体的热膨胀系数得到降低,所使用的釉料配方也需要相应地进行调整,以便更好地提高坯釉适应性。本发明采用透锂长石和碳酸锂混合物作为调节剂引入到釉料中,用Li2O置换部分K2O或Na2O有助于形成锂玻璃,降低釉的膨胀系数。另外,调节剂的助熔效果良好,可以降低釉的烧成温度,在高温段锂质熔融液的粘度不大,可以提高釉熔体的流动性,从而增加釉面的光泽度与平整度。
(3)通过优化调整坯料和釉料配方,制定合理的制备工艺,所制备的白瓷白度达到81以上,热稳定性达到200℃-20℃热交换二次不裂,完全能够达到日用瓷器国家标准GB/T3532-2009的要求;另外,所制备的陶瓷瓷质优良,釉面光泽度高、硬度大,适用于日用餐具类、咖啡具、酒具等方面的推广应用。
具体实施方式
以下通过具体实施方式对本发明作进一步的描述。
一种高热稳定性高白陶瓷,包括高热稳定性高白坯料和透明釉料,
所述高热稳定性高白坯料包括以下重量份的原料:内蒙古钾长石40-55份、临沧高岭土15-25份、龙岩高岭土10-20份、膨润土4-6份、低膨胀剂10-18份;
所述透明釉料包括以下重量份的原料:江西钾长石40-50份、石英15-25份、龙岩高岭土5-10份、重钙3-6份、煅烧氧化锌2-4份、硫酸钡4-6份、煅烧滑石6-12份、调节剂4-8份。
所述低膨胀剂为重量比为1:0.5-2的锂辉石和透锂长石混合物,所述调节剂为重量比为1:0.5-2的透锂长石和碳酸锂混合物。
实施例1-8坯料的原料组成如表1所示,釉料的原料组成如表2所示:
表1本发明实施例1-8坯料的原料组成(wt%)
表2本发明实施例1-8釉料的原料组成(wt%)
高热稳定性高白陶瓷的制备方法,包括以下步骤:
步骤一:坯体的制备
(1)精选原料并进行预先粉碎,根据配料比分别称取内蒙古钾长石、临沧高岭土、龙岩高岭土、膨润土、低膨胀剂,加入0.3wt%的三聚磷酸钠作为解胶剂和0.5wt%的羟丙基甲基纤维素作为粘结剂,按照料:球:水比例为1:1.8-2.5:0.55-0.65进行研磨;
(2)泥浆经过除铁、脱水、真空练泥、陈腐后,得到泥料;
(3)泥料成型为坯体,经过晾干、利坯后,在750℃温度下烧制得到素坯,备用。
步骤二:釉浆的制备
(1)精选原料,根据配比量将龙岩高岭土、江西钾长石、石英、重钙、煅烧氧化锌、硫酸钡、煅烧滑石、调节剂分别置于球磨机中进行研磨;
(2)研磨后釉浆过150目网筛,用强磁铁棒对釉浆进行除铁,釉浆浓度采用婆美计进行测量,釉浆浓度控制为婆美度38-42,备用。
步骤三:施釉,采用浸渍法将釉浆施于素烧坯体上,晾干。
步骤四:烧制,采用氧化焰烧成,烧成制度包括以下几个关键点:900至1100℃阶段烧制3h以上,1260℃至最高烧成温度1290-1320℃,烧制3h以上,高火保温20-40min,保温结束后的高温段微开窑门,之后随窑冷却。烧成制度总升温时间保证11h以上。
实施例1-8部分制备工艺参数如表3所示。
表3实施例1-8部分制备工艺参数
经本发明制备的高热稳定性高白陶瓷的白度和抗热震性按照日用陶瓷白度测定方法QB/T 1503—2011和日用陶瓷器抗热震性测定方法GB/T 3298—2008进行检测,实施例1-8所测试的白度和热稳定性如表4所示。本发明所制备的高热稳定性高白陶瓷的白度均在81以上,热稳定性达到200℃-20℃热交换二次不裂,完全能达到日用瓷器国家标准GB/T3532-2009的要求,比市场上某两种品牌的白瓷性能指标均有较大的提高。
表4实施例1-8和对照例的白度和热稳定性
本发明不限于上述实施例,上述实施例和说明书中描述的细节只是说明本发明的原理,本领域技术人员应该知道,在不背离本发明的精神或基本特征的情况下,依然可以对上述各实施例所记载的技术方案进行修改,或者对其中部分技术特征进行等同替换,所作的任何修改、等同替换或改进均应包含在本发明保护范围内。
Claims (10)
1.一种高热稳定性高白陶瓷,其特征在于,包括高热稳定性高白坯料和透明釉料,
所述高热稳定性高白坯料包括以下重量份的原料:内蒙古钾长石40-55份、临沧高岭土15-25份、龙岩高岭土10-20份、膨润土4-6份、低膨胀剂10-18份;
所述透明釉料包括以下重量份的原料:江西钾长石40-50份、石英15-25份、龙岩高岭土5-10份、重钙3-6份、煅烧氧化锌2-4份、硫酸钡4-6份、煅烧滑石6-12份、调节剂4-8份。
2.根据权利要求1所述的高热稳定性高白陶瓷,其特征在于:所述低膨胀剂为重量比为1:0.5-2的锂辉石和透锂长石混合物。
3.根据权利要求1或3所述的高热稳定性高白陶瓷,其特征在于:所述调节剂为重量比为1:0.5-2的透锂长石和碳酸锂混合物。
4.一种高热稳定性高白陶瓷的制备方法,其特征在于:制备权利要求1-3中任意一项所述的高热稳定性高白陶瓷,包括如下步骤:
步骤1:坯体的制备
(1)精选原料并进行预先粉碎,根据配料比分别称取内蒙古钾长石、临沧高岭土、龙岩高岭土、膨润土、低膨胀剂,加入一定量的解胶剂和粘结剂;
(2)泥浆经过除铁、脱水、真空练泥、陈腐后,得到泥料;
(3)泥料成型为坯体,经过晾干、利坯后,在700-800℃温度下烧制得到素坯,备用;
步骤二:釉浆的制备
(1)精选原料,根据配比量将龙岩高岭土、江西钾长石、石英、重钙、煅烧氧化锌、硫酸钡、煅烧滑石、调节剂分别置于球磨机中进行研磨;
(2)研磨后釉浆过100-200目网筛,用强磁铁棒对釉浆进行除铁,并控制釉浆浓度,备用;
步骤三:施釉,在素坯上施釉,并晾干;
步骤四:烧制,采用氧化焰烧成,烧成制度总升温时间保证11小时以上,最高烧成温度1290-1320℃。
5.根据权利要求8所述的高热稳定性高白陶瓷的制备方法,其特征在于:所述步骤1中,制坯时,按照料:球:水比例为1:1.8-2.5:0.55-0.65进行研磨。
6.根据权利要求4所述的高热稳定性高白陶瓷的制备方法,其特征在于:所述步骤三中,采用浸渍法将釉浆施于素烧坯体上。
7.根据权利要求4所述的高热稳定性高白陶瓷的制备方法,其特征在于:所述步骤一中解胶剂为三聚磷酸钠,添加量为物料的0.3-0.5wt%。
8.根据权利要求4或7所述的高热稳定性高白陶瓷的制备方法,其特征在于:所述步骤一中粘结剂为羟丙基甲基纤维素,添加量为物料的0.4-0.8wt%。
9.根据权利要求4所述的高热稳定性高白陶瓷的制备方法,其特征在于:所述步骤二中制备的釉浆浓度为波美度38-42。
10.根据权利要求4所述的高热稳定性高白陶瓷的制备方法,其特征在于:所述烧成制度包括以下几个关键点:900至1100℃阶段烧制3小时以上,1260℃至最高烧成温度烧制3h以上,高火保温20-40min,保温结束后的高温段微开窑门,之后随窑冷却。
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