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Calcium aluminate titanate powder and preparation method thereof

A technology of calcium aluminate titanate and powder, which is applied in the field of calcium aluminate titanate, which can solve the problem that there are few reports on the preparation of calcium aluminate titanate powder, the absence of calcium aluminate titanate minerals, and no reports of calcium aluminate titanate. problems, to achieve the effect of saving labor resources, reducing preparation costs, and low prices

Inactive Publication Date: 2017-05-31
WUHAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But Al 2 o 3 -TiO 2 In the -CaO ternary system, the formation of compounds is complex and changeable due to factors such as composition, temperature and impurity content, and natural calcium aluminate minerals hardly exist, so the preparation of calcium aluminate powder is reported less
[0003] At present, the preparation of calcium aluminate titanate includes: "a calcium aluminate titanate prefabricated part for lining of reverberatory furnace for vanadium smelting and its preparation method" (CN201510469732.X) and "a ladle bottom castable and its preparation method" (CN201510311418.9); or "a calcium aluminate titanate-high alumina modified refractory material and its preparation method and application" (CN201510013589.3) supplemented with high alumina raw materials; or the introduction of binders and sintering aids ( Wang Lifeng, et al. "SiO 2 The effect of the amount of fine powder added on the sintering performance of calcium aluminate titanate", "Refractory Materials", 2016, 50(3): pp195~198+203), etc., after mixing molding and firing, the finished products with their own characteristics were obtained, but not See reports on the preparation of high-purity, single-phase calcium aluminate titanate

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A calcium aluminum titanate powder and a preparation method thereof. The steps of the preparation method described in this embodiment are:

[0024] The first step, according to slaked lime: ρ-Al 2 o 3 The mass ratio of micropowder:titanium dioxide is 1:(3.05~3.07):(3.15~3.19), and slaked lime, ρ-Al 2 o 3 The fine powder and titanium dioxide are put into a ball mill, and ball milled for 1-2 hours to obtain a mixed powder.

[0025] In the second step, the mixed powder is placed in a muffle furnace for calcination, the calcination temperature is 550-600° C., and the calcination time is 0.5-1 h, to obtain the light-calcined mixed powder.

[0026] Step 3: According to the light-burned mixed powder: water mass ratio of 1: (0.30~0.40), add water to the light-burned mixed powder, grind until the particle size is ≤ 60 μm, and obtain the precursor mixture .

[0027] The fourth step is to add the precursor mixture into the mud refining machine, vacuum squeeze the mud, and tr...

Embodiment 2

[0030] A calcium aluminum titanate powder and a preparation method thereof. The steps of the preparation method described in this embodiment are:

[0031] The first step, according to slaked lime: ρ-Al 2 o 3 The mass ratio of micropowder:titanium dioxide is 1:(3.06~3.08):(3.17~3.21), and slaked lime, ρ-Al 2 o 3 The fine powder and titanium dioxide are put into a ball mill, and ball milled for 1-2 hours to obtain a mixed powder.

[0032] In the second step, the mixed powder is placed in a muffle furnace for calcination, the calcination temperature is 550-600° C., and the calcination time is 0.5-1 h, to obtain the light-calcined mixed powder.

[0033] Step 3: According to the light-burned mixed powder: water mass ratio of 1: (0.30~0.40), add water to the light-burned mixed powder, grind until the particle size is ≤ 60 μm, and obtain the precursor mixture .

[0034] The fourth step is to add the precursor mixture into the mud refining machine, vacuum squeeze the mud, and tr...

Embodiment 3

[0037] A calcium aluminum titanate powder and a preparation method thereof. The steps of the preparation method described in this embodiment are:

[0038] The first step, according to slaked lime: ρ-Al 2 o 3 The mass ratio of micropowder:titanium dioxide is 1:(3.07~3.09):(3.19~3.23), slaked lime, ρ-Al 2 o 3 The fine powder and titanium dioxide are put into a ball mill, and ball milled for 1-2 hours to obtain a mixed powder.

[0039] In the second step, the mixed powder is placed in a muffle furnace for calcination, the calcination temperature is 550-600° C., and the calcination time is 0.5-1 h, to obtain the light-calcined mixed powder.

[0040] Step 3: According to the light-burned mixed powder: water mass ratio of 1: (0.35~0.45), add water to the light-burned mixed powder, grind until the particle size is ≤ 60 μm, and obtain the precursor mixture .

[0041] The fourth step is to add the precursor mixture into the mud refining machine, vacuum squeeze the mud, and trap t...

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Abstract

The invention relates to calcium aluminate titanate powder and a preparation method thereof. The preparation method comprises the following steps: adding slaked lime, (Rho)-Al2O3 micropowder and titanium dioxide in a mass ratio of 1:(3.05-3.10):(3.15-3.25) into a ball mill, and performing ball milling for 1-2 hours; putting the product in a muffle, and calcinating for 0.5-1h at 550-600 DEG C to obtain light-burnt mixed powder; adding water into the light-burnt mixed powder at a mass ratio between the light-burnt mixed powder and water of 1:(0.30-0.45), and levigating until the particle size is less than or equal to 60mu m; adding the product into a pug mill, performing vacuum extrusion moulding, and aging for 24-36 hours; and heating to 1,400-1,550 DEG C in a high-temperature furnace, preserving heat for 1-3 hours and breaking to obtain calcium aluminate titanate powder. The preparation method has the characteristics of simple technology and low cost; and the prepared calcium aluminate titanate powder has high conversion rate and good sintering property.

Description

technical field [0001] The invention belongs to the technical field of calcium aluminate titanate. Specifically relates to a calcium aluminate powder and a preparation method thereof. Background technique [0002] Calcium aluminum titanate is Al 2 o 3 -TiO 2 -The stable phase in the CaO ternary system has the characteristics of high refractoriness, small thermal conductivity and strong wear resistance. It is a high-quality high-temperature ceramic and refractory raw material. But Al 2 o 3 -TiO 2 In the -CaO ternary system, the formation of compounds is complex and changeable due to factors such as composition, temperature and impurity content, and natural calcium aluminate minerals hardly exist, so the preparation of calcium aluminate powder is reported less. [0003] At present, the preparation of calcium aluminate titanate includes: "a calcium aluminate titanate prefabricated part for lining of reverberatory furnace for vanadium smelting and its preparation method"...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66C04B35/462
CPCC04B35/66C04B35/462C04B2235/3206C04B2235/3217C04B2235/77
Inventor 张寒陈建威赵惠忠李静捷赵鹏达易萍
Owner WUHAN UNIV OF SCI & TECH
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