CN1040570A - The preparation method of lead-free gluzed enamel - Google Patents

Abstract

The invention discloses a kind of preparation method of novel lead-free gluzed enamel.This lead-free gluzed enamel is to be that basic components is formulated with 50～80% glass cullet and 10～50% ready-formed fritted glaze.Its preparation process is to adopt ceramic grinding machine that this leadless glaze batching is worn into dry powder.The water of adding 30-50% is modulated into glaze slip.Glaze slip imposes on the semifinished product, after the drying, just can be made into the colored glaze product of bright glaze colours such as peacock blue, yellow, green, purple, black through firing process.Adopt prescription of the present invention, not only do not have the harm of lead poisoning in the production process, and can significantly reduce production costs human body.

Description

The preparation method of lead-free gluzed enamel

The present invention relates to a kind of technical field of lead-free gluzed enamel goods, specifically, the present invention relates to a kind of to use glass cullet and ready-formed fritted glaze to prepare the method for lead-free gluzed enamel as main raw material.

Colored glaze product is a kind of traditional senior roofing of China and the constructional ornamental material of body of wall, is mainly used in some classical architectures of China, among the building in the style of the ancients in gardens and modern age, makes it to have higher art value.

The history that China produces colored glaze product had 700 years, the preparation method of colored glaze product mainly contains two kinds, and a kind of is the traditional high lead glaze prescriptions of the many employings of northern China colored glaze product factory, and its preparation method generally adopts firing process twice, temperature of glaze firing is lower, is generally 750～900 ℃.Existing problem is the lead poisoning serious harm workers'health that production process produces.Another kind is China south colored glaze product factory low lead or unleaded glaze formulas of adopting more, and its preparation method is to need all raw materials are prefabricated into fritted glaze, generally adopts once-firing, and firing temperature is 1100～1200 ℃.This firing temperature is higher, so be not suitable for the firing condition that adopt at some Liulichangs of northern China.

Adopting cheap glass cullet is main raw material, and the firing condition that the lead-free gluzed enamel that makes is suitable for China south and the employing of northern Liulichang simultaneously is a purpose of the present invention.

Realize that concrete grammar of the present invention is:

At first prepare the prefabricated fritted glaze of lead-free gluzed enamel of the present invention, the prescription of fritted glaze is: quartz sand 30～50%; Soda ash 30～50%, borax 0～30%.Its melting technology is: use with coal gas, Sweet natural gas or the diesel oil cell furnace as fuel, found into prefabricated fritted glaze under 1300～1400 ℃ condition.

The preparation of lead-free gluzed enamel goods

The prescription of lead-free gluzed enamel is: glass cullet 50～80%; Prefabricated fritted glaze 10～50%; Kaolin 1～10%; Quartz sand 0～10%; Triphane 0～10%; Tinting material (as cupric oxide, ferric oxide, cobalt oxide, manganese oxide, chromic oxide) 1～15%, glaze slip properties-correcting agent (as water glass, magnesium chloride, dextrin) 0.1～1%.

Preparation process is: adopt ceramic grinding machine that leadless glaze batching of the present invention is worn into dry powder, make its fineness reach the standard (the 0.08mm square hole tails over less than 7%) of cement.In powdered frit, add 30～50% tap water then and be modulated into glaze slip.The method that glaze slip can adopt and water, soaks and spray imposes on the base substrate, drying.

It is that various types of ceramic kilns of fuel burn till that the firing process of this lead-free gluzed enamel goods can adopt with diesel oil, firewood and coal.Change by glaze formula can make firing temperature selected arbitrarily in 850～1200 ℃ of scopes.In general, when adopting base and glaze single firing process, need higher firing temperature (1100～1200 ℃).When adopting base and twice firing process of glaze, can adopt 850～950 ℃ of lower temperature of glaze firing.For each selected glaze formula, firing range is 50～60 ℃.

Adopt lead-free gluzed enamel of the present invention, in the colored glaze product production process, avoided lead poisoning fully for the healthy harm of workman.The raw materials cost of this leadless glaze is approximately 25% of high lead glaze, and raw material sources are extensive, and preparation technology is simple, and simultaneous adaptation is in the existing various types of colored glaze product of northern China and south factory.Adopt lead-free gluzed enamel of the present invention to can be made into bright peacock orchid, Huang, glaze colours colored glaze product such as green, purple, black.

Claims (3)

1, a kind of preparation method of lead-free gluzed enamel is characterized in that the prescription of this lead-free gluzed enamel is:

Glass cullet 50～80%;

Ready-formed fritted glaze 10～50%;

Kaolin 1～10%;

Quartz sand 0～10%;

Triphane 0～10%;

Tinting material (as cupric oxide, ferric oxide, cobalt oxide, manganese oxide, chromic oxide) 1～15%;

Glaze slip properties-correcting agent is (as water glass, magnesium chloride: dextrin) 0.1～1%

2, ready-formed fritted glaze according to claim 1 is characterized in that the prescription of this fritted glaze is: quartz sand 30～50%, soda ash 30～50%, borax 0～30%.The glass melting temperature of fritted glaze is 1300～1400 ℃.

3, the preparation method of lead-free gluzed enamel according to claim 1 is characterized in that adopting dry grind process that leadless glaze batching is worn into powdered frit, adds 30～50% tap water again and is modulated into glaze slip.