Translucent ceramic, method for manufacturing the same, optical component, and optical device

A technology of light transmission and ceramics, which is applied in the direction of optical elements, beam guiding devices, optical recording/reproduction, etc., can solve problems such as changes in refractive index and Abbe number, achieve increased light transmittance, and improve light transmittance The effect of high efficiency and excellent optical characteristics

Inactive Publication Date: 2008-04-16
MURATA MFG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Similarly, with Ba(Zn, Ta)O 3 It is also difficult to make a large change in the refractive index and Abbe number of the light-transmitting ceramics with the main component of type perovskite.

Method used

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  • Translucent ceramic, method for manufacturing the same, optical component, and optical device
  • Translucent ceramic, method for manufacturing the same, optical component, and optical device
  • Translucent ceramic, method for manufacturing the same, optical component, and optical device

Examples

Experimental program
Comparison scheme
Effect test

experiment example 1

[0084] As a raw material, prepare BaCO 3 , SrCO 3 , CaCO 3 , ZnO, MgCO 3 , Y 2 o 3 、In 2 o 3 、 Ta 2 o 5 , Nb 2 o 5 , SnO 2 , ZrO 2 and HfO 2 And other high-purity powder. Moreover, in order to obtain the general formula (Ba 1-s-t Sr s Ca t )(M x B1 y B2 z ) v o w (Wherein, M is at least one of Sn, Zr and Hf; B1 is at least one of Mg, Zn, Y and In; B2 is at least one of Ta and Nb; w is used to maintain electrical properties Any positive number of the property.) Indicated, various samples shown in Table 1 to Table 5, weigh various raw material powders, and then add SiO2 to various raw material powders. 2 , to make the content rate 100 mass ppm. This was followed by wet mixing with a ball mill for 16 hours. After the mixture was dried, it was calcined at a temperature of 1300° C. for 3 hours to obtain a calcined powder. The value of w after calcination is approximately 3.

[0085] [Table 1]

[0086] sample

Numbering

M's

...

experiment example 2

[0109] By the TMA method (thermomechanical analysis method), while setting the temperature increase rate at 5° C. / min, the shrinkage ratios of Sample 4 as a Comparative Example and Sample 19 as an Experimental Example prepared in the above-mentioned Experimental Example 1 were obtained. The shrinkage rate is based on the size before firing. Figure 7 shows the TMA curve with the shrinkage rate on the vertical axis and the temperature on the horizontal axis.

[0110] As can be seen from FIG. 7 , sample 19 as an example begins to shrink earlier than sample 4 as a comparative example, and the absolute value of the shrinkage rate also becomes larger when the shrinkage calms down. It can be considered that the difference in shrinkage behavior is reflected in the difference in pore volume ratio.

experiment example 3

[0112] As a raw material, prepare BaCO 3 , SrCO 3 , CaCO 3 , ZnO, MgCO 3 , Y 2 o 3 、In 2 o 3 、 Ta 2 o 5 , Nb 2 o 5 , SnO 2 , ZrO 2 and HfO 2 And other high-purity powder. Moreover, in order to obtain the general formula (Ba 1-s-t Sr s Ca t )(Ti x1 m x2 B1 y B2 z ) v o w (Wherein, M includes at least one of Sn, Zr and Hf; B1 is at least one of Mg, Zn, Y and In; B2 is at least one of Ta and Nb; w is used to maintain electrical properties Positive number of property.) Represented, various samples shown in Table 6 to Table 10, various raw material powders were weighed, and wet-mixed for 16 hours with a ball mill. After the mixture was dried, it was calcined at a temperature of 1300° C. for 3 hours to obtain a calcined powder. The value of w is close to 3 after calcination.

[0113] [Table 6]

[0114] sample

Numbering

M's

Element type

and content

B1's

Element type

and content

B2

Element t...

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Abstract

Disclosed is a light-transmitting ceramic having high light transmittance. Specifically disclosed is a light-transmitting ceramic mainly containing a perovskite compound having a chemical composition represented by the following general formula: (Ba1-s-tSrsCat)(MxB1yB2z)vOw (wherein M includes at least one of Sn, Zr and Hf; B1 represents at least one of Mg, Zn, Y and In; B2 represents at least one of Ta and Nb; 0 = s = 0.99; 0.01 = t = 0.45; x + y + z = 1; 0 < x = 0.9; 1.00 = z / y = 2.40; 0.97 = v = 1.05; and w represents a positive number required for maintaining electroneutrality). This light-transmitting ceramic can be advantageously used as an objective lens (2) for an optical pickup (9).

Description

technical field [0001] The present invention relates to a translucent ceramic used as a material for optical components such as lenses, a method for producing the same, an optical component and an optical device using the translucent ceramic. Background technique [0002] So far, as materials for optical components such as lenses mounted in optical devices such as optical pickups, for example, as described in Patent Document 1 and Patent Document 2, glass or plastics, or lithium niobate (LiNbO 3 ) and other single crystals. [0003] Because glass and plastic have high light transmittance and are easy to process into desired shapes, they are mainly used for optical components such as lenses. On the other hand, LiNbO 3 Such single crystals are mainly used in optical components such as optical waveguides by utilizing their electro-optical properties and birefringence. Optical devices such as optical pickups using such optical components are required to achieve further miniat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/00G02B1/00G11B7/135G11B7/1374
Inventor 金高祐仁吴竹悟志
Owner MURATA MFG CO LTD
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