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Preparation method of calcium magnesium phosphate for ceramic

A calcium magnesium phosphate, ceramic technology, applied in chemical instruments and methods, phosphorus compounds, inorganic chemistry and other directions, can solve the problems of reducing product ornamental, single color, etc., to achieve stable glaze color, good thermal stability, fine and smooth glaze surface Effect

Active Publication Date: 2014-04-23
淄博华光国瓷科技文化有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the porcelain made from animal ashes can only be white and has a single color, which reduces the ornamental value of the product

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Ca(OH) 2 , MgCO 3 by weight Ca 2+ : Mg 2+ =7:3 ratio mixing, add to the reaction device at the same time, add water to dilute, stir for 20~30min, make solution A for later use;

[0024] Weigh phosphoric acid according to the molar ratio of Ca+Mg / P=1.15, pour it into a stainless steel container with water at a volume ratio of 1: 1.5, and dilute it into solution B with a concentration of 30% for later use;

[0025] Slowly titrate solution B into solution A to make it react evenly. The specific reaction formula is:

[0026] MgCO 3 + Ca(OH) 2 + H 3 PO 4 —→ Ca 2 Mg(PO 4 ) 2 + H 2 O + CO 2

[0027] MgCO 3 + Ca(OH) 2 + H 3 PO 4 —→CaMg(HPO 4 ) 2 + H 2 O + CO 2

[0028] After the reaction, the pH of the solution=6, let it stand for 3~10 hours to obtain MgCa 2 (PO 4 ) 2 and CaMg (HPO 4 ) 2 The solution C of solution C is press-filtered and dried to obtain a filter cake with a water content of less than 10%;

[0029] The filter cake is...

Embodiment 2

[0035] Ca(OH) 2 , MgCO 3 by weight Ca 2+ : Mg 2+ =6:4 ratio mixing, add to the reaction device at the same time, add water to dilute, stir for 20~30min, and make solution A;

[0036] Weigh phosphoric acid according to the molar ratio of Ca+Mg / P=1.2, pour it into a stainless steel container at a volume ratio of 1:2 with water, and dilute it into solution B with a concentration of 25%;

[0037] Slowly titrate solution B into solution A to make it react evenly, the pH of the solution after reaction is 7, let it stand for 3~10 hours to get MgCa 2 (PO 4 ) 2 and CaMg (HPO 4 ) 2 The solution C of solution C is press-filtered and dried to obtain a filter cake with a water content of less than 10%;

[0038] The filter cake is calcined under an oxidizing flame at 20~1260°C for 14~16 hours, then calcined at a weak reducing flame at 1260~1300°C for 2~3 hours, and the calcium magnesium phosphate salt is obtained after cooling.

[0039] Reaction principle and method of use are ...

Embodiment 3

[0041] Ca(OH) 2 , MgCO3 by weight Ca 2+ : Mg 2+ =8:2 ratio mixing, add to the reaction device at the same time, add water to dilute, stir for 20~30min, and make solution A;

[0042] Weigh phosphoric acid according to the molar ratio of Ca+Mg / P=1.3, pour it into a stainless steel container at a volume ratio of 1:1.75 with water, and dilute it into solution B with a concentration of 35%;

[0043] Slowly titrate solution B into solution A to make it react uniformly, the pH of the solution after reaction is 5, let it stand for 3-10 hours to obtain MgCa 2 (PO 4 ) 2 and CaMg (HPO 4 ) 2 The solution C of solution C is press-filtered and dried to obtain a filter cake with a water content of less than 10%;

[0044] The filter cake is calcined under an oxidizing flame at 20~1260°C for 14~16 hours, then calcined at a weak reducing flame at 1260~1300°C for 2~3 hours, and the calcium magnesium phosphate salt is obtained after cooling.

[0045] Reaction principle and method of u...

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Abstract

The invention relates to a preparation method of calcium magnesium phosphate for ceramic, belonging to the field of ceramic glass materials. The calcium magnesium phosphate for ceramic is characterized in that the calcium magnesium phosphate for ceramic is synthesized by using phosphoric acid, calcium hydroxide and magnesium carbonate through chemical reaction, and the chemical compositions of the calcium magnesium phosphate comprise MgCa2(PO4) and CaMg(HPO4)2, wherein the weight ratio of Ca<2> to Mg<2> is (6-9): (1-4). A ceramic product made of the calcium magnesium phosphate for ceramic which is used as a main material has the advantages that the ceramic glaze surface is fine and smooth, the glazing color is stable, nontoxic and environmental-friendly and the application scope is wide. By introducing a large quantity of magnesium oxide to replace partial calcium oxide, the produced ceramic product has the advantages that the entire body has light-blue gloss, the semi-transparency is higher, the refraction principle of light can be fully utilized, and the ceramic product is enabled to have attractive gloss with white in blue and blue in white.

Description

technical field [0001] The invention discloses a preparation method of calcium magnesium phosphate salt for ceramics, which belongs to the field of ceramic glass materials. Background technique [0002] Raw materials such as clay, feldspar, and quartz are the main components in the production of traditional porcelain. Porcelain fired with traditional raw materials has a single type of color and poor ornamental value. With the continuous improvement of people's living standards, the environmental protection and decoration of daily-use ceramic products have attracted much attention, especially some high-grade porcelains are more and more popular because of their clear porcelain and beautiful color. At present, many new varieties of daily-use ceramics have emerged, such as Luyu porcelain, steatite porcelain, high-quartz porcelain and bone china. development is gradually enriched. [0003] At present, the main components of high-grade ceramics are not limited to basic raw mate...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B25/45
Inventor 孟莉张宁陈娜
Owner 淄博华光国瓷科技文化有限公司
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