CN1693291A - Low temp. red glaze for ceramics and mfg. method thereof - Google Patents

Abstract

A low-temp oriental red enamel for ceramics is proportionally prepared from Al2O3, CaO, Li2O, SiO2, ZnO, ZrO2, B2O3, Na2O, La2O3, PbO, K2O and SnO2 through mixing, smelting, quenching in water to become blocks, adding pigment and water, ball grinding and sieving.

Description

Pottery low temperature red glaze and manufacture method thereof

Technical field

The present invention relates to a kind of pottery low temperature red glaze and manufacture method thereof.

Background technology

At ceramic field, red glaze is decorated and is subjected to human consumer's favor with its noble quality, gorgeous, lucid and lively tone dark, but this kind glaze poor heat stability, not acidproof, when being used for daily utensil, its lead, cadmium stripping ultimate value can't meet the international hygiene standard.And the thermostability of red glaze and antiacid erosional competency are poor, plumbous, quantity of cadmium release ultimate value height.

Summary of the invention

The objective of the invention is to prepare a kind of domestic ceramics that is used for decorates, burn till fast in 760 ℃～800 ℃ that to have a colour generation lucid and lively, full, thermostability and acidproof ability are good, make its lead, cadmium stripping ultimate value meet the low temperature red glaze of international hygiene standard.

As everyone knows, cadmium sulfoselenide pigment could stably present big red color in rich sodium borosilicate glass, but the thermal expansivity of sodium borosilicate glass is generally 9～15 * 10 ^-6/ ℃ about, and the thermal expansivity of domestic ceramics base substrate is 3～5 * 10 ^-6/ ℃, both can't adapt to.

From the thermostability formula

$K=\frac{p}{\mathrm{aE}}\sqrt{\frac{\mathrm{\λ}}{\mathrm{cd}}}$

In the formula: the thermal stability factor of K-glass; The degree cel ^1/2The tensile strength limit of P-glass; Kgf/millimeter ²The linear expansivity of α-glass; The Young's modulus of E-glass; Kgf/millimeter ²The thermal conductivity of λ-glass; Card/cps degree; The thermal capacitance of c-glass; Card/gram degree; The density of d-glass; Gram per centimeter ³

Learn that thermostability had both depended on thermal expansivity consumingly, also depend on the tensile strength of material.Therefore improving the overglaze tensile strength can obtain the ideal glaze fit equally.Experiment is found with an amount of La ₂O ₃(2～5%) and ZrO ₂(1～4%) displacement SiO ₂, form LaB and Zr ₃B ₄Can greatly improve the tensile strength of glass, the corresponding thermostability that improves red glaze, thus reach the purpose that the base glaze mates.

It is to produce neutralization reaction by the metal ion in water and the glaze to generate oxyhydroxide that acid is corroded overglaze.If the top layer at glaze can form one deck acidic oxide, this reaction just can't be carried out so.Glass can produce noted phase separation phenomena in forming process as everybody knows, utilizes this phenomenon, adds some acidic oxide (as ZrO in glaze ₂, SnO ₂, ZrSiO ₄) make it at the glaze surface enrichment, thereby reach the acid proof purpose.

The objective of the invention is to realize with the following methods:

Raw material weight per-cent component when (1) pottery is manufactured with the low temperature red glaze is:

Al ₂O ₃??5～7.5％，????CaO??1～5％，?????Li ₂O??1～4％，

SiO ₂???35～45％，?????ZnO??1～5％，?????ZrO ₂??1～4％，

B ₂O ₃???7～16％，?????Na ₂O?3～6％，????La ₂O3?2～5％，

PbO????5～17％，????????K ₂O??1～4％，???SnO ₂??1～3％；

(2) with the accurately weighing to scale of above-mentioned raw materials component, mix, after 1250 ℃ of fusions, pour that quenching becomes frit in the water into;

(3) get 100 parts of above-mentioned frits, add 6 parts in color base, 50 parts in water is gone into ball mill ball milling 72 hours to through 250 mesh sieves, promptly prepares at 760 ℃～800 ℃ pottery that burns till fast low temperature red glazes.

The pottery made with manufacture method of the present invention is by Al with the low temperature red glaze ₂O ₃5～7.5%, CaO 1～5%, Li ₂O 1～4%, SiO ₂35～45%, ZnO 1～5, ZrO ₂1～4%, B ₂O ₃7～16%, Na ₂O 3～6%, La ₂O ₃2～5%, PbO 5～17%, K ₂O 1～4%, SnO ₂1～3% raw material is made.Glaze or glaze spraying technology are soaked in employing, burn till in 760 ℃～800 ℃.It is even, lucid and lively, full to burn the back color and luster, strikes up partnership in the porcelain base, and thermostability reaches international domestic ceramics standard, and plumbous, cadmium stripping ultimate value reaches the international hygiene standard.

Embodiment

By following prescription get the raw materials ready (weight %):

Component concentration	Al 2O 3	?SiO 2	?Na 2O	?K 2O	?B 2O 3	?ZrO 2	?SnO 2	?CaO	?La 2O 3	?PbO	?Li 2O	?ZnO
													Embodiment	7	?43.5	?6	?3	?13	?3	?3	?2.5	?2.5	?15	?0.5	?1

With the accurately weighing to scale of above-mentioned raw materials component, mix, after 1250 ℃ of fusions, pour that quenching becomes frit in the water into; Get 100 parts of above-mentioned frits, add 6 parts in color base, 50 parts in water is gone into the ball mill ball milling and was extremely promptly got 760 ℃～800 ℃ low temperature red glazes through 250 mesh sieves in 72 hours.

By above-mentioned processing requirement, 1124 ^#Glazing on the milk cup, after testing, product performance are as follows:

(1) colourimetric number (chromaticity coordinate value): saturation ratio (L) 36.31, red scale value (a) 58.75, blue degree value (b) 40.30.

(2) plumbous, cadmium stripping value: measured value (mg)

From the above, product meets the international hygiene standard fully, and it is the pottery low temperature red glaze that a kind of ideal meets the international hygiene standard.

Claims (2)

1, a kind of pottery manufacture method of low temperature red glaze is characterized in that:

Raw material weight per-cent component when (1) described pottery is manufactured with the low temperature red glaze is:

Al ₂O ₃??5～7.5％????CaO????1～5％???Li ₂O???1～4％

SiO ₂????35～45％????ZnO????1～5％???ZrO ₂???1～4％

B ₂O ₃???7～16％?????Na ₂O?3～6％???La ₂O ₃?2～5％

PbO???????5～17％?????K ₂O??1～4％???SnO ₂???1～3％

(2) with the accurately weighing to scale of above-mentioned raw materials component, mix, after 1250 ℃ of fusions, pour that quenching becomes frit in the water into;

(3) get 100 parts of above-mentioned frits, add 6 parts in color base, 50 parts in water is gone into the ball mill ball milling and was extremely promptly got 760 ℃～800 ℃ low temperature red glazes through 250 mesh sieves in 72 hours.

2, a kind of pottery low temperature red glaze made from claims 1 described method.