Zircon-free anorthite-based opaque glaze and preparation method thereof

An opaque glaze and anorthite technology, applied in the field of ceramic glaze, can solve problems such as excessive radioactivity of products, damage to consumers' health, easy yellowing of the glaze surface, low cost, favorable promotion and application, and scope of application. wide effect

Active Publication Date: 2020-04-21
JINGDEZHEN CERAMIC INSTITUTE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Tin oxide opacifying glaze has a good opacifying effect, but the disadvantage is that it is expensive and sensitive to atmosphere. If fired in a reducing atmosphere, a transparent glaze will be obtained.
TiO in Titanium Oxide Opaque Glaze 2 Crystallization makes the glaze surface have a good opacity effect, but it is mainly suitable for low-temperature enamel glazes with a firing temperature of 750-850°C. When the firing temperature is ≥1000°C, the glaze surface is prone to yellowing
Zirconium silicate opaque glaze is the most widely us

Method used

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  • Zircon-free anorthite-based opaque glaze and preparation method thereof
  • Zircon-free anorthite-based opaque glaze and preparation method thereof

Examples

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Effect test

Embodiment 1

[0022] 1. A zirconium-free anorthite-based opacified glaze in this embodiment. The raw material composition is: clay 8wt%, potash feldspar 10wt%, albite 20wt%, quartz 15wt%, calcite 15wt%, wollastonite 5wt% %, alumina 8wt%, zinc oxide 3wt%, burnt talc 5wt%, glass powder 10wt%, nucleating agent 1wt% (TiO 2 0.5 wt%+B 2 O 3 0.5wt%). Among them, the raw material composition of glass powder is SiO 2 65 wt%, Al 2 O 3 4 wt%, CaO 8wt%, MgO 3wt%, K 2 O 5wt%, Na 2 O 15wt%.

[0023] 2. The method for preparing the above-mentioned zirconium-free anorthite-based opacified glaze in this embodiment includes the following steps:

[0024] (1) According to the raw material composition of the opal glaze, add water and wet ball milling (according to the mass ratio of materials: ball stone: water = 1:2:0.5) for 8 hours to obtain a glaze slurry with a particle size D90 of 8.3 μm;

[0025] (2) Add water to adjust the specific gravity of the glaze slurry to 1.75g / cm 3 , The flow rate is 25s / 100mL, and the ...

Embodiment 2

[0028] 1. In this embodiment, a zirconium-free anorthite-based opacified glaze, the raw material composition is: clay 8wt%, albite 30wt%, quartz 15wt%, calcite 20wt%, alumina 8.5wt%, zinc oxide 3wt% , Burned talc 6wt%, glass powder 9wt%, nucleating agent P 2 O 5 0.5 wt%. Among them, the raw material composition of glass powder is SiO 2 70 wt%, Al 2 O 3 3wt%, CaO 8wt%, MgO2wt%, K 2 O 4wt%, Na 2 O 13wt%.

[0029] 2. The method for preparing the above-mentioned zirconium-free anorthite-based opacified glaze in this embodiment includes the following steps:

[0030] (1) According to the raw material composition of the opal glaze, add water and wet ball milling (according to the mass ratio of materials: ball stone: water = 1:2:0.5) for 6 hours to obtain a glaze slurry with a particle size D90 of 9.5 μm;

[0031] (2) Add water to adjust the specific gravity of the glaze slurry to 1.50g / cm 3 , The flow rate is 20s / 100mL, and the glaze slurry is applied to the surface of the body by spraying...

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Abstract

The invention discloses a zircon-free anorthite-based opaque glaze, which comprises the following raw materials: 5-10 wt% of clay, 0-10 wt% of potassium feldspar, 20-40 wt% of albite, 5-20 wt% of quartz, 10-25 wt% of calcite, 0-10 wt% of wollastonite, 8-15 wt% of aluminum oxide, 1-10 wt% of zinc oxide, 3-8 wt% of calcined talc, 1-15 wt% of glass powder and 0.5-1.5 wt% of a nucleating agent. The invention also discloses a preparation method of the zircon-free anorthite-based opaque glaze. According to the invention, by using the low-cost raw materials and optimizing the formula system, flaky orblocky anorthite crystals are separated out from the interior of the glaze layer, and the three-dimensional crystallization is combined, so that the good glaze opacifying effect is achieved while thewhiteness and the hardness of the glaze are also improved, and the product performance is effectively improved; the raw materials do not contain radioactive elements and are harmless to the environment and human bodies; the opaque glaze is wide in application range and beneficial to popularization and application.

Description

Technical field [0001] The invention relates to the technical field of ceramic glazes, in particular to an anorthite-based opacified glaze and a preparation method thereof. Background technique [0002] In order to cover the poor coloring and defects of the green body and expand the source of raw materials, opal glaze with good decorative effect is widely used on the surface of architectural ceramics and sanitary ceramics. [0003] The opacification mechanism of opalescent glaze is that when there is a second phase (or multiphase) in the glaze layer with different properties from the basic glass, incident light passing through the glaze layer will be reflected, refracted and diffusely reflected at the multiphase interface And other phenomena, so that the glaze layer is devitrified and the opacifying effect is obtained. The opal glaze commonly used in the ceramic industry is tin oxide opal glaze, titanium oxide opal glaze and zirconium silicate opal glaze. Tin oxide opacified glaz...

Claims

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Application Information

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IPC IPC(8): C03C8/00C03C3/087C04B41/86C03C6/04
CPCC03C1/00C03C3/087C03C8/00C03C2205/02C04B41/5022C04B41/86C04B41/4539
Inventor 王少华汪永清李小女汪超张小珍常启兵
Owner JINGDEZHEN CERAMIC INSTITUTE
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