附录 D：陶瓷尺寸规格

下表给出了各制造商的陶瓷尺寸规格。

表 D1. PZT 陶瓷的机械公差

TYPE III DOD-STD-1376A	Branson Ultrasonics	CeramTec Catalogue (SP8)	Morgan Electro Ceramics Ruabon (PZT8)	Vernitron	TAMURA SA
厚度	±0.13mm	±0.05mm（不含镀层）	标准 — ±0.05mm （不含镀层）	±0.05mm（不含镀层）	标准 — -0/+0.05mm，高成本 — -0/+0.005mm，（不含镀层）
外径	±0.38mm	±0.1mm 至 ±0.3mm	标准 — ±0.15mm	±0.15mm	±0.4mm
内径	±0.38mm	±0.1mm 至 ±0.3mm	标准 — ±0.15mm	±0.15mm	±0.4mm
平行度 — 上、下表面	0.0254mm 至 0.0127mm	从 ≤0.02mm 到 ≤0.002mm	标准 — 0.012mm 以内研磨、镀银 — 0.007mm 以内	≤0.012mm	≤0.01mm
同心度	?	≤0.1mm	0.2mm T.I.R.	0.2mm T.I.R.	?
表面平面度	0.0254mm 至 0.0127mm	4 μm	标准 — ≤12 μm 研磨、镀银 — 2 μm 以内至 5 个光带	从 12 μm 至 5 个光带	≤10 μm
垂直度（棱边对面）	?	无规格	≤0.5°	≤0.5°	?
表面光洁度	0.9 μm （35 微英寸）	标准、抛光 K-Schliff	标准 — ≤3 μm 研磨镀银 — ≤0.5 μm	从 3 μm 至 0.3 μm	标准 — 抛光（#800）高成本 — 抛光（#2,000）（在印刷银电极之前）
粗糙度	?	≤1.6 μm（Ra 值）	?		?

注：

数据主要来自 Prokic，第 6‑9、6.1‑1 页。
TIR = total indicator reading（总指示读数）
1 个光带 = 0.000294 mm = 0.294 μm（采用钠光源）
K-Schliff = 仅磨出平整表面而不考虑外观的技术磨削（AUTANIA GRINDING TECHNOLOGIES）
Ra = 平均粗糙度
#2,000 = zzz
zzz 见 Prokic 评注第 6-10 页；我的笔记第 6-16 页

Appendix D: Ceramic dimensional specifications

The following table gives ceramic dimensional specifications from various manufacturers.

Table D1. Mechanical tolerances for PZT ceramics

TYPE III DOD-STD-1376A	Branson Ultrasonics	CeramTec Catalogue (SP8)	Morgan Electro Ceramics Ruabon (PZT8)	Vernitron	TAMURA SA
Thickness	±0.13mm	±0.05mm (without plating)	Standard — ±0.05mm (without plating)	±0.05mm (without plating)	Standard — -0/+0.05mm, High cost — -0/+0.005mm, (without plating)
Outer diameter	±0.38mm	±0.1mm to ±0.3mm	Standard — ±0.15mm	±0.15mm	±0.4mm
Inner Diameter	±0.38mm	±0.1mm to ±0.3mm	Standard — ±0.15mm	±0.15mm	±0.4mm
Parallelism — top and bottom surface	0.0254mm until 0.0127mm	from ≤0.02mm to ≤0.002mm	Standard — within 0.012mm Lapped, silver plated — within 0.007mm	≤0.012mm	≤0.01mm
Concentricity	?	≤0.1mm	0.2mm T.I.R.	0.2mm T.I.R.	?
Surface flatness	0.0254mm until 0.0127mm	4 μm	Standard — ≤12 μm Lapped, silver plated — Within 2 μm to 5 light bands	From 12 μm to 5 light bands	≤10 μm
Squareness (edge to face)	?	No specification	≤0.5°	≤0.5°	?
Surface finish	0.9 μm (35 micro‑inches)	Standard, Polished K-Schliff	Standard — ≤3 μm Lapped silver — ≤0.5 μm	From 3 μm until 0.3 μm	Standard — polished (#800) High cost — polished (#2,000) (before silver electrodes are printed)
Roughness	?	≤1.6 μm (Ra – value)	?		?

Notes:

Data is mainly from Prokic, pp. 6‑9, 6.1‑1.
TIR = total indicator reading
1 light band = 0.000294 mm = 0.294 μm with a sodium light source
K-Schliff = technical grinding that creates only a flat surface without consideration of the visual appearance (AUTANIA GRINDING TECHNOLOGIES)
Ra = Roughness, average
#2,000 = zzz
zzz See Prokic comments p. 6-10; my notes p. 6-16